Merge remote-tracking branch 'bbb/master'
This commit is contained in:
Joshua Bell
commit
ec94293ec9
|
|
@ -0,0 +1,3 @@
|
|||
# Generated files
|
||||
*.list
|
||||
*.SYS
|
||||
|
|
@ -0,0 +1,11 @@
|
|||
sudo: enabled
|
||||
os: osx
|
||||
language: c
|
||||
|
||||
install:
|
||||
- git clone https://github.com/cc65/cc65 /tmp/cc65 &&
|
||||
sudo make -C /tmp/cc65 ca65 ld65 avail &&
|
||||
ca65 --version
|
||||
|
||||
script:
|
||||
- make
|
||||
|
|
@ -0,0 +1,27 @@
|
|||
|
||||
CAFLAGS = --target apple2enh --list-bytes 0
|
||||
LDFLAGS = --config apple2-asm.cfg
|
||||
|
||||
TARGETS = bye.system.SYS buhbye.system.SYS quit.system.SYS
|
||||
|
||||
# For timestamps
|
||||
MM = $(shell date "+%-m")
|
||||
DD = $(shell date "+%-d")
|
||||
YY = $(shell date "+%-y")
|
||||
DEFINES = -D DD=$(DD) -D MM=$(MM) -D YY=$(YY)
|
||||
|
||||
.PHONY: clean all
|
||||
all: $(TARGETS)
|
||||
|
||||
HEADERS = $(wildcard *.inc)
|
||||
|
||||
clean:
|
||||
rm -f *.o
|
||||
rm -f $(TARGETS)
|
||||
|
||||
%.o: %.s $(HEADERS)
|
||||
ca65 $(CAFLAGS) $(DEFINES) --listing $(basename $@).list -o $@ $<
|
||||
|
||||
%.SYS: %.o
|
||||
ld65 $(LDFLAGS) -o $@ $<
|
||||
xattr -wx prodos.AuxType '00 20' $@
|
||||
|
|
@ -0,0 +1,69 @@
|
|||
# Bird's Better Bye - Disassembly (and improvements)
|
||||
|
||||
[](https://travis-ci.org/a2stuff/bbb)
|
||||
|
||||
The ProDOS operating system for the Apple II personal computer line
|
||||
supported a quit routine (invoked from BASIC with the `BYE` command)
|
||||
allowing the user to type the name of a system file to invoke once
|
||||
the previous system file had exited.
|
||||
|
||||
[Alan Bird](https://alanlbird.wordpress.com/products/) wrote a
|
||||
replacement called **Bird's Better Bye** that would patch itself into
|
||||
ProDOS, fitting into a tight 768 bytes. It provides a menu system,
|
||||
allowing selection of system files (with the arrow keys), directories
|
||||
(with the return key to enter and escape key to exit), and devices
|
||||
(with the tab key), with a minimal and stylish 80-column display using
|
||||
MouseText folder glyphs.
|
||||
|
||||
Later official versions of ProDOS replaced the previous quit routine
|
||||
with _Bird's Better Bye_.
|
||||
|
||||
## ProDOS 2.4 / Bitsy Bye
|
||||
|
||||
The new (unofficial) releases of
|
||||
[ProDOS 2.4](http://www.callapple.org/uncategorized/announcing-prodos-2-4-for-all-apple-ii-computers/)
|
||||
by John Brooks include a replacement quit routine called Bitsy Bye,
|
||||
a collaboration with Peter Ferrie. This new quit routine is far more
|
||||
powerful, allowing access to BASIC and binary files (and more), drive
|
||||
selection, type-down, more entries, and so on. It runs on older
|
||||
hardware than _Bird's Better Bye_ so uses only 40 columns, and does
|
||||
not require a 65C02 processor.
|
||||
|
||||
Impressed though I am with the power of Bitsy Bye, I am not a fan of
|
||||
its aesthetics - the display is "cluttered" to my eye.
|
||||
|
||||
## BYE.SYSTEM
|
||||
|
||||
Aeons ago, Dave Cotter created BYE.SYSTEM which would patch _Bird's
|
||||
Better Bye_ back into ProDOS if it had been replaced. It can be found
|
||||
at:
|
||||
|
||||
http://www.lazilong.com/apple_ii/bye.sys/bye.html
|
||||
|
||||
Since I really liked the look of _Bird's Better Bye_ I used this as
|
||||
the boot system for my virtual hard drive (occuring after some [clock
|
||||
drivers](https://github.com/a2stuff/cricket)).
|
||||
|
||||
## Buh-Bye
|
||||
|
||||
But... I really wanted a way to quickly scroll through my games list.
|
||||
So I set out to improve _Bird's Better Bye_ by disassembling it (and
|
||||
the `BYE.SYSTEM` installer), thus ending up with "Bell's Better Bird's
|
||||
Better Bye" or "Buh-Bye" for short.
|
||||
|
||||
The changes are so far pretty minimal since my 6502 skills are not,
|
||||
in fact, mad, and there are only 768 bytes to play with.
|
||||
|
||||
I replaced the directory enumeration logic with tighter code as
|
||||
outlined in the ProDOS Technical Reference Manual, and along with
|
||||
other optimizations I made enough room to add seeking if an
|
||||
alphabetical key is typed (hit 'C' and the list will scroll to the
|
||||
next file starting with 'C').
|
||||
|
||||
There are a few spare bytes to play with and more can be squeezed
|
||||
out, so perhaps further improvements can be made.
|
||||
|
||||
## QUIT.SYSTEM
|
||||
|
||||
This just invokes the ProDOS quit handler immediately. It can
|
||||
be used as the last in a chain of "driver" installers.
|
||||
|
|
@ -0,0 +1,706 @@
|
|||
;;; Disassembly of BYE.SYSTEM (Bird's Better Bye)
|
||||
;;; Modifications by Joshua Bell inexorabletash@gmail.com
|
||||
;;; (so this is Bell's Better Bird's Better Bye - Buh-Bye)
|
||||
;;; * alpha key advances to next matching filename
|
||||
;;; * replaced directory enumeration (smaller, per PDTRM)
|
||||
;;; * installs, then chains to next .SYSTEM file
|
||||
|
||||
.setcpu "65C02"
|
||||
.linecont +
|
||||
.feature string_escapes
|
||||
|
||||
.include "apple2.inc"
|
||||
.include "apple2.mac"
|
||||
|
||||
.include "inc/apple2.inc"
|
||||
.include "inc/macros.inc"
|
||||
.include "inc/prodos.inc"
|
||||
|
||||
;;; Miscellaneous
|
||||
|
||||
COL80HPOS := $57B
|
||||
|
||||
;;; I/O Soft Switches / Firmware
|
||||
|
||||
ROMINNW := $C082 ; Read ROM; no write
|
||||
ROMINWB1 := $C089 ; Read ROM; write RAM bank 1
|
||||
|
||||
SLOT3 := $C300
|
||||
|
||||
;;; Monitor
|
||||
|
||||
SETTXT := $FB39
|
||||
TABV := $FB5B
|
||||
SETPWRC := $FB6F
|
||||
BELL1 := $FBDD
|
||||
SETINV := $FE80
|
||||
|
||||
;;; ASCII/Key codes
|
||||
ASCII_TAB := $9
|
||||
ASCII_DOWN := $A ; down arrow
|
||||
ASCII_UP := $B ; up arrow
|
||||
ASCII_CR := $D
|
||||
ASCII_RIGHT := $15 ; right arrow
|
||||
ASCII_SYN := $16 ; scroll text window up
|
||||
ASCII_ETB := $17 ; scroll text window down
|
||||
ASCII_EM := $19 ; move cursor to upper left
|
||||
ASCII_ESCAPE := $1B
|
||||
|
||||
|
||||
;;; ************************************************************
|
||||
.include "driver_preamble.inc"
|
||||
;;; ************************************************************
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
;;; ProDOS Technical Reference Manual, 5.1.5.2:
|
||||
;;;
|
||||
;;; ProDOS MLI call $65, the QUIT call, moves addresses $D100 through
|
||||
;;; $D3FF from the second 4K bank of RAM of the language card to
|
||||
;;; $1000, and executes a JMP to $1000. What initially resides in that
|
||||
;;; area is Apple's dispatcher code.
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Installer
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
install_size := $300 ; must fit in $D100...$D3FF = $300
|
||||
|
||||
.proc maybe_install_driver
|
||||
|
||||
src := install_src
|
||||
end := install_src + install_size
|
||||
dst := $D100 ; Install location in ProDOS (bank 2)
|
||||
|
||||
src_ptr := $19
|
||||
dst_ptr := $1B
|
||||
|
||||
sta ALTZPOFF
|
||||
lda ROMIN ; write bank 2
|
||||
lda ROMIN
|
||||
|
||||
lda #<src ; src_ptr = src
|
||||
sta src_ptr
|
||||
lda #>src
|
||||
sta src_ptr+1
|
||||
|
||||
lda #<dst ; dst_ptr = dst
|
||||
sta dst_ptr
|
||||
lda #>dst
|
||||
sta dst_ptr+1
|
||||
|
||||
loop: lda (src_ptr) ; *src_ptr = *dst_ptr
|
||||
sta (dst_ptr)
|
||||
|
||||
inc src_ptr ; src_ptr++
|
||||
bne :+
|
||||
inc src_ptr+1
|
||||
|
||||
: inc dst_ptr ; dst_ptr++
|
||||
bne :+
|
||||
inc dst_ptr+1
|
||||
|
||||
: lda src_ptr+1 ; src_ptr == end ?
|
||||
cmp #>end
|
||||
bne loop
|
||||
lda src_ptr
|
||||
cmp #<end
|
||||
bne loop
|
||||
|
||||
sta ALTZPOFF
|
||||
sta ROMINWB1
|
||||
sta ROMINWB1
|
||||
|
||||
rts
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Selector
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
install_src := *
|
||||
|
||||
pushorg $1000
|
||||
.proc selector
|
||||
|
||||
prefix := $280 ; length-prefixed
|
||||
|
||||
filenames := $1400 ; each is length + 15 bytes
|
||||
read_buffer := $2000 ; Also, start location for launched SYS files
|
||||
|
||||
;; Device/Prefix enumeration
|
||||
next_device_num := $65 ; next device number to try
|
||||
prefix_depth := $6B ; 0 = root
|
||||
|
||||
;; Directory enumeration
|
||||
entry_pointer := $60 ; 2 bytes
|
||||
block_entries := $62
|
||||
active_entries := $63 ; 2 bytes
|
||||
|
||||
entry_length := $6E
|
||||
entries_per_block := $6F
|
||||
file_count := $70 ; 2 bytes
|
||||
|
||||
;; Found entries
|
||||
current_entry := $67 ; index of current entry
|
||||
num_entries := $68 ; length of |filenames| (max 128)
|
||||
curr_len := $69 ; length of current entry name
|
||||
curr_ptr := $6C ; address of current entry name (in |filenames|)
|
||||
types_table := $74 ; high bit clear = dir, set = sys
|
||||
|
||||
;; Entry display
|
||||
page_start := $73 ; index of first entry shown on screen
|
||||
row_count := $6A ; number of rows in this page
|
||||
top_row := 2 ; first row used on screen
|
||||
bottom_row := 21 ; last row used on screen
|
||||
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
cld ; ProDOS protocol for QUIT routine
|
||||
lda ROMINNW ; Page in ROM for reads, writes ignored
|
||||
|
||||
lda #$A0
|
||||
jsr SLOT3 ; Activate 80-Column Firmware
|
||||
|
||||
;; Update system bitmap
|
||||
ldx #BITMAP_SIZE-1 ; zero it all out
|
||||
: stz BITMAP,x
|
||||
dex
|
||||
bpl :-
|
||||
inc BITMAP+BITMAP_SIZE-1 ; protect ProDOS global page
|
||||
lda #%11001111 ; protect zp, stack, text page 1
|
||||
sta BITMAP
|
||||
|
||||
;; Find device
|
||||
lda DEVCNT ; max device num
|
||||
sta next_device_num
|
||||
lda DEVNUM
|
||||
bne check_device
|
||||
|
||||
next_device:
|
||||
ldx next_device_num
|
||||
lda DEVLST,x
|
||||
cpx #1
|
||||
bcs :+
|
||||
ldx DEVCNT
|
||||
inx
|
||||
: dex
|
||||
stx next_device_num
|
||||
|
||||
check_device:
|
||||
sta on_line_params_unit
|
||||
MLI_CALL ON_LINE, on_line_params
|
||||
bcs next_device
|
||||
|
||||
stz prefix_depth
|
||||
lda prefix+1
|
||||
and #$0F
|
||||
beq next_device
|
||||
adc #2
|
||||
tax
|
||||
|
||||
;; Resize prefix to length x and open the directory for reading
|
||||
.proc resize_prefix_and_open
|
||||
stx prefix
|
||||
lda #'/'
|
||||
sta prefix+1 ; ensure prefix is at least '/'
|
||||
sta prefix,x ; and ends with '/'
|
||||
stz prefix+1,x ; and is null terminated
|
||||
|
||||
stz num_entries
|
||||
|
||||
;;; Enumerate directory
|
||||
;;; Algorithm from ProDOS Technical Reference Manual B.2.5
|
||||
|
||||
;; Open the directory
|
||||
jsr do_open
|
||||
bcc :+
|
||||
|
||||
;; Open failed
|
||||
fail: lda prefix_depth ; root?
|
||||
beq next_device
|
||||
jsr pop_prefix ; and go up a level
|
||||
bra resize_prefix_and_open
|
||||
|
||||
;; Open succeeded
|
||||
: inc prefix_depth
|
||||
|
||||
;; Read a block (512 bytes) into buffer
|
||||
stz read_params_request
|
||||
lda #2
|
||||
sta read_params_request+1
|
||||
jsr do_read
|
||||
bcs fail
|
||||
|
||||
;; Store entry_length (byte), entries_per_block (byte), file_count (word)
|
||||
ldx #3
|
||||
: lda read_buffer + SubdirectoryHeader::entry_length,x
|
||||
sta entry_length,x
|
||||
dex
|
||||
bpl :-
|
||||
|
||||
;; Any entries?
|
||||
lda file_count
|
||||
ora file_count+1
|
||||
beq close_dir
|
||||
|
||||
;; Skip header entry
|
||||
clc
|
||||
lda #<(read_buffer+4) ; 4 bytes for prev/next pointers
|
||||
adc entry_length
|
||||
sta entry_pointer
|
||||
lda #>(read_buffer+4)
|
||||
adc #0 ; TODO: Can skip this if entry_length << 256
|
||||
sta entry_pointer+1
|
||||
|
||||
;; Prepare to process entry two (first "entry" is header)
|
||||
lda #2
|
||||
sta block_entries
|
||||
|
||||
while_loop:
|
||||
;; Check if entry is active
|
||||
lda (entry_pointer)
|
||||
beq done_entry
|
||||
|
||||
;; Check file type
|
||||
ldy #FileEntry::file_type
|
||||
lda (entry_pointer),y
|
||||
cmp #FT_DIRECTORY
|
||||
beq store_entry
|
||||
cmp #FT_SYSTEM
|
||||
bne done_active_entry
|
||||
|
||||
store_entry:
|
||||
;; Store type
|
||||
ldx num_entries
|
||||
sta types_table,x
|
||||
|
||||
;; Copy name into |filenames|
|
||||
jsr update_curr_ptr ; current entry in X
|
||||
ldy #15 ; max name length (length byte copied too)
|
||||
: lda (entry_pointer),y
|
||||
sta (curr_ptr),y
|
||||
dey
|
||||
bpl :-
|
||||
iny ; Y = 0; storage_type/name_length in A
|
||||
and #%00001111 ; mask off name_length (remove storage_type)
|
||||
sta (curr_ptr),y ; store length
|
||||
|
||||
inc num_entries
|
||||
|
||||
done_active_entry:
|
||||
dec file_count
|
||||
bpl :+
|
||||
dec file_count+1
|
||||
:
|
||||
|
||||
done_entry:
|
||||
;; Seen all active entries?
|
||||
lda file_count
|
||||
ora file_count+1
|
||||
beq close_dir
|
||||
|
||||
;; Seen all entries in this block?
|
||||
lda block_entries
|
||||
cmp entries_per_block
|
||||
bne next_in_block
|
||||
|
||||
;; Grab next block
|
||||
next_block:
|
||||
jsr do_read ; read another block
|
||||
bcs fail
|
||||
|
||||
lda #1 ; first entry in non-key block
|
||||
sta block_entries
|
||||
|
||||
lda #<(read_buffer+4) ; 4 bytes for prev/next pointers
|
||||
sta entry_pointer
|
||||
lda #>(read_buffer+4)
|
||||
sta entry_pointer+1
|
||||
|
||||
bra end_while
|
||||
|
||||
;; Next entry in current block
|
||||
next_in_block:
|
||||
clc
|
||||
lda entry_pointer
|
||||
adc entry_length
|
||||
sta entry_pointer
|
||||
lda entry_pointer+1
|
||||
adc #0
|
||||
sta entry_pointer+1
|
||||
|
||||
inc block_entries
|
||||
|
||||
end_while:
|
||||
;; Check to see if we have room
|
||||
bit num_entries ; max is 128
|
||||
bpl while_loop
|
||||
|
||||
close_dir:
|
||||
MLI_CALL CLOSE, close_params
|
||||
;; fall through
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc draw_screen
|
||||
jsr SETTXT ; TEXT
|
||||
jsr HOME ; HOME
|
||||
lda #23 ; VTAB 23
|
||||
jsr TABV
|
||||
|
||||
;; Print help text
|
||||
lda #20 ; HTAB 20
|
||||
sta CH
|
||||
ldy #(help_string - text_resources)
|
||||
jsr cout_string
|
||||
|
||||
;; Draw prefix
|
||||
jsr home
|
||||
ldx #0
|
||||
: lda prefix+1,x
|
||||
beq :+
|
||||
jsr ascii_cout
|
||||
inx
|
||||
bne :-
|
||||
|
||||
: stz current_entry
|
||||
stz page_start
|
||||
lda num_entries
|
||||
beq selection_loop_keyboard_loop ; no entries (empty directory)
|
||||
|
||||
;; Draw entries
|
||||
cmp #bottom_row ; more entries than fit?
|
||||
bcc :+
|
||||
lda #(bottom_row - top_row + 1)
|
||||
: sta row_count
|
||||
lda #top_row
|
||||
sta WNDTOP
|
||||
sta WNDLFT
|
||||
lda #bottom_row+1
|
||||
sta WNDWDTH
|
||||
sta WNDBTM
|
||||
loop: jsr draw_current_line
|
||||
inc current_entry
|
||||
dec row_count
|
||||
bne loop
|
||||
stz current_entry
|
||||
beq selection_loop
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
;; Remove level from prefix; returns new length in X
|
||||
.proc pop_prefix
|
||||
ldx prefix
|
||||
loop: dex
|
||||
lda prefix,x
|
||||
cmp #'/'
|
||||
bne loop
|
||||
cpx #1
|
||||
bne done
|
||||
ldx prefix
|
||||
done:
|
||||
;; Fall through...
|
||||
.endproc
|
||||
|
||||
handy_rts:
|
||||
rts
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc on_down
|
||||
jsr down_common
|
||||
bra selection_loop
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc on_up
|
||||
ldx current_entry ; first one?
|
||||
beq selection_loop
|
||||
dec current_entry ; go to previous
|
||||
|
||||
lda CV
|
||||
cmp #top_row ; at the top?
|
||||
bne selection_loop
|
||||
dec page_start ; yes, adjust page and
|
||||
lda #ASCII_SYN ; scroll screen up
|
||||
jsr COUT
|
||||
;; fall through
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc selection_loop
|
||||
jsr SETINV
|
||||
jsr draw_current_line
|
||||
|
||||
keyboard_loop:
|
||||
lda KBD
|
||||
bpl keyboard_loop
|
||||
sta KBDSTRB
|
||||
jsr SETNORM
|
||||
|
||||
cmp #HI(ASCII_TAB)
|
||||
beq next_drive
|
||||
cmp #HI(ASCII_ESCAPE)
|
||||
beq on_escape
|
||||
|
||||
ldx num_entries
|
||||
beq keyboard_loop ; if empty, no navigation
|
||||
|
||||
pha
|
||||
jsr draw_current_line
|
||||
pla
|
||||
|
||||
cmp #HI(ASCII_CR)
|
||||
beq on_return
|
||||
cmp #HI(ASCII_DOWN)
|
||||
beq on_down
|
||||
cmp #HI(ASCII_UP)
|
||||
beq on_up
|
||||
;; fall through
|
||||
.endproc
|
||||
selection_loop_keyboard_loop := selection_loop::keyboard_loop
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc on_alpha
|
||||
loop: jsr down_common
|
||||
jsr draw_current_line
|
||||
lda KBD
|
||||
and #$5F ; make ASCII and uppercase
|
||||
ldy #1
|
||||
cmp (curr_ptr),y ; key = first char ?
|
||||
beq selection_loop
|
||||
bra loop
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc on_escape
|
||||
jsr pop_prefix ; leaves length in X
|
||||
dec prefix_depth
|
||||
bra resize_prefix_and_open_jmp
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
.proc down_common
|
||||
lda current_entry
|
||||
inc a
|
||||
cmp num_entries ; past the limit?
|
||||
bcc :+
|
||||
pla ; yes - abort subroutine
|
||||
pla
|
||||
bra selection_loop
|
||||
|
||||
: sta current_entry ; go to next
|
||||
|
||||
lda CV
|
||||
cmp #bottom_row ; at the bottom?
|
||||
bne handy_rts
|
||||
inc page_start ; yes, adjust page and
|
||||
lda #ASCII_ETB ; scroll screen down
|
||||
jmp COUT ; implicit rts
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
next_drive: ; relay for branches
|
||||
jmp next_device
|
||||
|
||||
inc_resize_prefix_and_open:
|
||||
inx
|
||||
|
||||
resize_prefix_and_open_jmp:
|
||||
jmp resize_prefix_and_open
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc on_return
|
||||
MLI_CALL SET_PREFIX, set_prefix_params
|
||||
bcs next_drive
|
||||
ldx current_entry
|
||||
jsr update_curr_ptr
|
||||
|
||||
ldx prefix
|
||||
: iny
|
||||
lda (curr_ptr),y
|
||||
inx
|
||||
sta prefix,x
|
||||
cpy curr_len
|
||||
bcc :-
|
||||
stx prefix
|
||||
|
||||
ldy current_entry
|
||||
lda types_table,y
|
||||
bpl inc_resize_prefix_and_open ; is directory???
|
||||
;; nope, system file, so...
|
||||
|
||||
;; fall through
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc launch_sys_file
|
||||
jsr SETTXT
|
||||
jsr HOME
|
||||
lda #HI(ASCII_RIGHT) ; Right arrow ???
|
||||
jsr COUT
|
||||
|
||||
jsr do_open
|
||||
bcs next_drive
|
||||
lda #$FF ; Load up to $FFFF bytes
|
||||
sta read_params_request
|
||||
sta read_params_request+1
|
||||
jsr do_read
|
||||
php
|
||||
MLI_CALL CLOSE, close_params
|
||||
plp
|
||||
bcs next_drive
|
||||
jmp read_buffer ; Invoke the loaded code
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc cout_string
|
||||
loop: lda help_string,y
|
||||
beq handy_rts2
|
||||
jsr COUT
|
||||
iny
|
||||
bra loop
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
;; Compute address/length of curr_ptr/curr_len
|
||||
;; Call with entry index in X. Returns with Y = 0
|
||||
|
||||
.proc update_curr_ptr
|
||||
stz curr_ptr+1
|
||||
txa
|
||||
asl a
|
||||
rol curr_ptr+1
|
||||
asl a
|
||||
rol curr_ptr+1
|
||||
asl a
|
||||
rol curr_ptr+1
|
||||
asl a
|
||||
rol curr_ptr+1
|
||||
sta curr_ptr
|
||||
lda #>filenames
|
||||
clc
|
||||
adc curr_ptr+1
|
||||
sta curr_ptr+1
|
||||
ldy #0
|
||||
lda (curr_ptr),y
|
||||
sta curr_len
|
||||
;; fall through
|
||||
.endproc
|
||||
|
||||
handy_rts2:
|
||||
rts
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc draw_current_line
|
||||
lda #2 ; hpos = 2
|
||||
sta COL80HPOS
|
||||
|
||||
ldx current_entry ; vpos = entry - page_start + 2
|
||||
txa
|
||||
sec
|
||||
sbc page_start
|
||||
inc a
|
||||
inc a
|
||||
jsr TABV
|
||||
|
||||
lda types_table,x
|
||||
bmi name ; is sys file?
|
||||
|
||||
;; Draw folder glyph
|
||||
stz COL80HPOS
|
||||
lda INVFLG
|
||||
pha
|
||||
ldy #(folder_string - text_resources) ; Draw folder glyphs
|
||||
jsr cout_string
|
||||
pla
|
||||
sta INVFLG
|
||||
|
||||
;; Draw the name
|
||||
name: jsr space
|
||||
jsr update_curr_ptr
|
||||
loop: iny
|
||||
lda (curr_ptr),y
|
||||
jsr ascii_cout
|
||||
cpy curr_len
|
||||
bcc loop
|
||||
|
||||
space: lda #HI(' ')
|
||||
bne cout ; implicit RTS
|
||||
.endproc
|
||||
|
||||
home: lda #HI(ASCII_EM) ; move cursor to top left
|
||||
|
||||
;; Sets high bit before calling COUT
|
||||
ascii_cout:
|
||||
ora #$80
|
||||
cout: jmp COUT
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc do_open
|
||||
MLI_CALL OPEN, open_params
|
||||
lda open_params_ref_num
|
||||
sta read_params_ref_num
|
||||
rts
|
||||
.endproc
|
||||
|
||||
.proc do_read
|
||||
MLI_CALL READ, read_params
|
||||
rts
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
text_resources := *
|
||||
|
||||
.proc help_string
|
||||
scrcode "RETURN: Select | TAB: Chg Vol | ESC: Back"
|
||||
.byte 0
|
||||
.endproc
|
||||
|
||||
;; Mousetext sequence: Enable, folder left, folder right, disable
|
||||
.proc folder_string
|
||||
.byte $0F,$1B,$D8,$D9,$18,$0E
|
||||
.byte 0 ; null terminated
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
DEFINE_OPEN_PARAMS open_params, prefix, $1C00
|
||||
open_params_ref_num := open_params::ref_num
|
||||
|
||||
DEFINE_CLOSE_PARAMS close_params
|
||||
|
||||
DEFINE_ON_LINE_PARAMS on_line_params, $60, prefix+1
|
||||
on_line_params_unit := on_line_params::unit_num
|
||||
|
||||
DEFINE_SET_PREFIX_PARAMS set_prefix_params, prefix
|
||||
|
||||
DEFINE_READ_PARAMS read_params, read_buffer, 0
|
||||
read_params_ref_num := read_params::ref_num
|
||||
read_params_request := read_params::request_count
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.endproc
|
||||
.assert .sizeof(selector) <= install_size, error, "Must fit in $300 bytes"
|
||||
poporg
|
||||
|
||||
;;; ************************************************************
|
||||
.include "driver_postamble.inc"
|
||||
;;; ************************************************************
|
||||
|
|
@ -0,0 +1,723 @@
|
|||
;;; Disassembly of BYE.SYSTEM (Bird's Better Bye)
|
||||
|
||||
.setcpu "65C02"
|
||||
.include "apple2.inc"
|
||||
.include "prodos.inc"
|
||||
|
||||
;;; Miscellaneous
|
||||
|
||||
RESETVEC := $3F2
|
||||
|
||||
COL80HPOS := $57B
|
||||
|
||||
;;; I/O Soft Switches / Firmware
|
||||
|
||||
RAMRDOFF := $C002 ; If 80STORE Off: Read Main Mem $0200-$BFFF
|
||||
RAMRDON := $C003 ; If 80STORE Off: Read Aux Mem $0200-$BFFF
|
||||
RAMWRTOFF := $C004 ; If 80STORE Off: Write Main Mem $0200-$BFFF
|
||||
RAMWRTON := $C005 ; If 80STORE Off: Write Aux Mem $0200-$BFFF
|
||||
ALTZPOFF := $C008 ; Main Stack and Zero Page
|
||||
ALTZPON := $C009 ; Aux Stack and Zero Page
|
||||
ROMINNW := $C082 ; Read ROM; no write
|
||||
ROMINWB1 := $C089 ; Read ROM; write RAM bank 1
|
||||
|
||||
SLOT3 := $C300
|
||||
|
||||
;;; Monitor
|
||||
|
||||
SETTXT := $FB39
|
||||
TABV := $FB5B
|
||||
SETPWRC := $FB6F
|
||||
BELL1 := $FBDD
|
||||
HOME := $FC58
|
||||
COUT := $FDED
|
||||
SETINV := $FE80
|
||||
SETNORM := $FE84
|
||||
|
||||
;;; ASCII/Key codes
|
||||
ASCII_TAB := $9
|
||||
ASCII_DOWN := $A ; down arrow
|
||||
ASCII_UP := $B ; up arrow
|
||||
ASCII_CR := $D
|
||||
ASCII_RIGHT := $15 ; right arrow
|
||||
ASCII_SYN := $16 ; scroll text window up
|
||||
ASCII_ETB := $17 ; scroll text window down
|
||||
ASCII_EM := $19 ; move cursor to upper left
|
||||
ASCII_ESCAPE := $1B
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.define HI(char) (char|$80)
|
||||
|
||||
.macro HIASCII arg
|
||||
.repeat .strlen(arg), i
|
||||
.byte .strat(arg, i) | $80
|
||||
.endrep
|
||||
.endmacro
|
||||
|
||||
.macro HIASCIIZ arg
|
||||
HIASCII arg
|
||||
.byte 0
|
||||
.endmacro
|
||||
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
;;; ProDOS Technical Reference Manual, 5.1.5.2:
|
||||
;;;
|
||||
;;; ProDOS MLI call $65, the QUIT call, moves addresses $D100 through
|
||||
;;; $D3FF from the second 4K bank of RAM of the language card to
|
||||
;;; $1000, and executes a JMP to $1000. What initially resides in that
|
||||
;;; area is Apple's dispatcher code.
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Entry point
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
;; Loads at $2000 but executed at $1000.
|
||||
|
||||
.org $2000
|
||||
|
||||
jmp install_and_quit
|
||||
install_src := *
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Selector
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.org $1000
|
||||
.proc bbb
|
||||
|
||||
prefix := $280 ; length-prefixed
|
||||
|
||||
filenames := $1400 ; each is length + 15 bytes
|
||||
read_buffer := $2000 ; Also, start location for launched SYS files
|
||||
|
||||
mark_params := $60
|
||||
mark_ref_num := $61
|
||||
mark_position := $62 ; 3-bytes
|
||||
|
||||
next_device_num := $65 ; next device number to try
|
||||
|
||||
current_entry := $67 ; index of current entry
|
||||
num_entries := $68 ; length of |filenames|
|
||||
curr_len := $69 ; length of current entry name
|
||||
curr_ptr := $6C ; address of current entry name (in |filenames|)
|
||||
|
||||
prefix_depth := $6B ; 0 = root
|
||||
|
||||
entry_length := $6E
|
||||
entries_per_block := $6F
|
||||
file_count := $70 ; 2 bytes
|
||||
entry_num := $72
|
||||
page_start := $73 ; index of first entry shown on screen
|
||||
|
||||
max_entries := 128 ; max # of entries; more are ignored
|
||||
types_table := $74 ; high bit clear = dir, set = sys
|
||||
|
||||
top_row := 2 ; first row used on screen
|
||||
bottom_row := 21 ; last row used on screen
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
cld ; ProDOS protocol for QUIT routine
|
||||
lda ROMINNW ; Page in ROM for reads, writes ignored
|
||||
|
||||
;; Point reset vector at this routine
|
||||
stz RESETVEC
|
||||
lda #>bbb
|
||||
sta RESETVEC+1
|
||||
jsr SETPWRC ; update validity check byte
|
||||
|
||||
lda #$A0
|
||||
jsr SLOT3 ; Activate 80-Column Firmware
|
||||
|
||||
;; Update system bitmap
|
||||
ldx #BITMAP_SIZE-1 ; zero it all out
|
||||
: stz BITMAP,x
|
||||
dex
|
||||
bpl :-
|
||||
inc BITMAP+BITMAP_SIZE-1 ; protect ProDOS global page
|
||||
lda #%11001111 ; protect zp, stack, text page 1
|
||||
sta BITMAP
|
||||
|
||||
;; Find device
|
||||
lda #2
|
||||
sta mark_params
|
||||
ldx DEVCNT ; max device num
|
||||
stx next_device_num
|
||||
lda DEVNUM
|
||||
bne check_device
|
||||
|
||||
next_device:
|
||||
ldx next_device_num
|
||||
lda DEVLST,x
|
||||
cpx #1
|
||||
bcs :+
|
||||
ldx DEVCNT
|
||||
inx
|
||||
: dex
|
||||
stx next_device_num
|
||||
|
||||
check_device:
|
||||
sta on_line_params_unit
|
||||
MLI_CALL ON_LINE, on_line_params
|
||||
bcs next_device
|
||||
|
||||
stz prefix_depth
|
||||
lda prefix+1
|
||||
and #$0F
|
||||
beq next_device
|
||||
adc #2
|
||||
tax
|
||||
|
||||
;; Resize prefix to length x and open the directory for reading
|
||||
.proc resize_prefix_and_open
|
||||
stx prefix
|
||||
lda #'/'
|
||||
sta prefix+1
|
||||
sta prefix,x
|
||||
stz prefix+1,x
|
||||
|
||||
MLI_CALL OPEN, open_params
|
||||
bcc :+
|
||||
|
||||
;; Open failed
|
||||
lda prefix_depth ; root?
|
||||
beq next_device
|
||||
jsr BELL1 ; no, but failed; beep
|
||||
jsr pop_prefix ; and go up a level
|
||||
stx prefix
|
||||
jmp keyboard_loop
|
||||
|
||||
|
||||
;; Open succeeded
|
||||
: inc prefix_depth
|
||||
stz num_entries
|
||||
lda open_params_ref_num
|
||||
sta read_params_ref_num
|
||||
sta mark_ref_num
|
||||
lda #DirectoryHeader::size
|
||||
sta read_params_request
|
||||
stz read_params_request+1
|
||||
jsr do_read
|
||||
bcs finish_read2
|
||||
|
||||
;; Store entry_length/entries_per_block/file_count
|
||||
ldx #3
|
||||
: lda read_buffer + DirectoryHeader::entry_length,x
|
||||
sta entry_length,x
|
||||
dex
|
||||
bpl :-
|
||||
|
||||
sta read_params_request
|
||||
lda #1
|
||||
sta entry_num
|
||||
stz mark_position+1
|
||||
stz mark_position+2
|
||||
|
||||
lda file_count
|
||||
ora file_count+1
|
||||
bne next_file_entry ; any files?
|
||||
|
||||
finish_read2:
|
||||
bra finish_read
|
||||
|
||||
next_file_entry:
|
||||
bit file_count+1 ; wrap around?
|
||||
bmi finish_read2
|
||||
|
||||
|
||||
;; TODO: The math here is mysterious; understand and document
|
||||
floop: lda mark_position+1
|
||||
and #$FE
|
||||
sta mark_position+1
|
||||
ldy entry_num
|
||||
lda #0
|
||||
cpy entries_per_block
|
||||
bcc :+
|
||||
tay
|
||||
sty entry_num
|
||||
|
||||
inc mark_position+1
|
||||
carry: inc mark_position+1
|
||||
: dey
|
||||
clc
|
||||
bmi :+
|
||||
adc entry_length
|
||||
bcc :-
|
||||
bcs carry
|
||||
|
||||
: adc #4
|
||||
sta mark_position
|
||||
MLI_CALL SET_MARK, mark_params
|
||||
bcs finish_read2
|
||||
jsr do_read
|
||||
bcs finish_read2
|
||||
|
||||
inc entry_num
|
||||
lda read_buffer + FileEntry::storage_type
|
||||
and #$F0 ; mask off storage_type
|
||||
beq floop ; inactive file entry
|
||||
dec file_count
|
||||
bne :+
|
||||
dec file_count+1
|
||||
|
||||
;; Check read access
|
||||
: ror read_buffer + FileEntry::access
|
||||
bcc next_file_entry
|
||||
|
||||
;; Check file type
|
||||
lda read_buffer + FileEntry::file_type
|
||||
cmp #FileType::Directory
|
||||
beq :+
|
||||
cmp #FileType::System
|
||||
bne next_file_entry
|
||||
|
||||
;; Check to see if we have room
|
||||
: ldx num_entries
|
||||
cpx #max_entries
|
||||
bcs finish_read
|
||||
|
||||
;; Store type
|
||||
sta types_table,x
|
||||
|
||||
;; Copy name
|
||||
jsr update_curr_ptr
|
||||
ldy #$0F ; name length + 1 (includes length byte)
|
||||
: lda read_buffer,y
|
||||
sta (curr_ptr),y
|
||||
dey
|
||||
bpl :-
|
||||
iny ; Y = 0
|
||||
and #$0F ; mask off name length (remove storage_type)
|
||||
sta (curr_ptr),y ; store length
|
||||
|
||||
;; Next
|
||||
inc num_entries
|
||||
bne next_file_entry
|
||||
|
||||
next: jmp next_device
|
||||
|
||||
finish_read:
|
||||
MLI_CALL CLOSE, close_params
|
||||
bcs next
|
||||
;; fall through
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc draw_screen
|
||||
jsr SETTXT ; TEXT
|
||||
jsr HOME ; HOME
|
||||
lda #23 ; VTAB 23
|
||||
jsr TABV
|
||||
|
||||
;; Print help text
|
||||
ldy #0
|
||||
lda #20 ; HTAB 20
|
||||
jsr cout_string_hpos
|
||||
|
||||
;; Draw prefix
|
||||
jsr home
|
||||
ldx #0
|
||||
: lda prefix+1,x
|
||||
beq :+
|
||||
jsr ascii_cout
|
||||
inx
|
||||
bne :-
|
||||
|
||||
: stz current_entry
|
||||
stz page_start
|
||||
lda num_entries
|
||||
beq keyboard_loop ; no entries (empty directory)
|
||||
|
||||
row_count := $6A
|
||||
|
||||
cmp #bottom_row ; more entries than fit?
|
||||
bcc :+
|
||||
lda #(bottom_row - top_row + 1)
|
||||
: sta row_count
|
||||
lda #2
|
||||
sta WNDTOP
|
||||
sta WNDLFT
|
||||
lda #22
|
||||
sta WNDWDTH
|
||||
sta WNDBTM
|
||||
loop: jsr draw_current_line
|
||||
inc current_entry
|
||||
dec row_count
|
||||
bne loop
|
||||
stz current_entry
|
||||
beq draw_current_line_inv
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc on_up
|
||||
jsr draw_current_line ; clear inverse selection
|
||||
|
||||
ldx current_entry
|
||||
beq draw_current_line_inv ; first one? just redraw
|
||||
dec current_entry ; go to previous
|
||||
|
||||
lda CV
|
||||
cmp #top_row ; at the top?
|
||||
bne draw_current_line_inv ; if not, just draw
|
||||
dec page_start ; yes, adjust page and
|
||||
lda #ASCII_SYN ; scroll screen up
|
||||
bne draw_current_line_with_char
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc on_down
|
||||
jsr draw_current_line ; clear inverse selection
|
||||
|
||||
ldx current_entry
|
||||
inx
|
||||
cpx num_entries ; past the limit?
|
||||
bcs draw_current_line_inv ; yes, just redraw
|
||||
stx current_entry ; go to next
|
||||
|
||||
lda CV
|
||||
cmp #bottom_row ; at the bottom?
|
||||
bne draw_current_line_inv ; if not, just draw
|
||||
inc page_start ; yes, adjust page and
|
||||
lda #ASCII_ETB ; scroll screen down
|
||||
;; fall through
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
draw_current_line_with_char:
|
||||
jsr COUT
|
||||
|
||||
draw_current_line_inv:
|
||||
jsr SETINV
|
||||
jsr draw_current_line
|
||||
;; fall through
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc keyboard_loop
|
||||
lda KBD
|
||||
bpl keyboard_loop
|
||||
sta KBDSTRB
|
||||
jsr SETNORM
|
||||
ldx num_entries
|
||||
beq :+ ; no up/down/return if empty
|
||||
|
||||
cmp #HI(ASCII_CR)
|
||||
beq on_return
|
||||
cmp #HI(ASCII_DOWN)
|
||||
beq on_down
|
||||
cmp #HI(ASCII_UP)
|
||||
beq on_up
|
||||
|
||||
: cmp #HI(ASCII_TAB)
|
||||
beq next_drive
|
||||
cmp #HI(ASCII_ESCAPE)
|
||||
bne keyboard_loop
|
||||
;; fall through
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc on_escape
|
||||
jsr pop_prefix ; leaves length in X
|
||||
dec prefix_depth
|
||||
bra resize_prefix_and_open_jmp
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
;; Remove level from prefix; returns new length in X
|
||||
.proc pop_prefix
|
||||
ldx prefix
|
||||
loop: dex
|
||||
lda prefix,x
|
||||
cmp #'/'
|
||||
bne loop
|
||||
cpx #1
|
||||
bne done
|
||||
ldx prefix
|
||||
done: rts
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
next_drive:
|
||||
jmp next_device
|
||||
|
||||
inc_resize_prefix_and_open:
|
||||
inx
|
||||
|
||||
resize_prefix_and_open_jmp:
|
||||
jmp resize_prefix_and_open
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc on_return
|
||||
MLI_CALL SET_PREFIX, set_prefix_params
|
||||
bcs next_drive
|
||||
ldx current_entry
|
||||
jsr update_curr_ptr
|
||||
|
||||
ldx prefix
|
||||
: iny
|
||||
lda (curr_ptr),y
|
||||
inx
|
||||
sta prefix,x
|
||||
cpy curr_len
|
||||
bcc :-
|
||||
stx prefix
|
||||
|
||||
ldy current_entry
|
||||
lda types_table,y
|
||||
bpl inc_resize_prefix_and_open ; is directory???
|
||||
;; nope, system file, so...
|
||||
|
||||
;; fall through
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc launch_sys_file
|
||||
jsr SETTXT
|
||||
jsr HOME
|
||||
lda #HI(ASCII_RIGHT) ; Right arrow
|
||||
jsr COUT
|
||||
|
||||
MLI_CALL OPEN, open_params
|
||||
bcs next_drive
|
||||
lda open_params_ref_num
|
||||
sta read_params_ref_num
|
||||
lda #$FF ; Load up to $FFFF bytes
|
||||
sta read_params_request
|
||||
sta read_params_request+1
|
||||
jsr do_read
|
||||
php
|
||||
MLI_CALL CLOSE, close_params
|
||||
plp
|
||||
bcs next_drive
|
||||
jmp read_buffer ; Invoke the loaded code
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
cout_string_hpos:
|
||||
sta CH
|
||||
|
||||
.proc cout_string
|
||||
loop: lda help_string,y
|
||||
beq done
|
||||
jsr COUT
|
||||
iny
|
||||
bne loop
|
||||
done: rts
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
;; Compute address/length of curr_ptr/curr_len
|
||||
;; Call with entry index in X.
|
||||
|
||||
.proc update_curr_ptr
|
||||
stz curr_ptr+1
|
||||
txa
|
||||
asl a
|
||||
rol curr_ptr+1
|
||||
asl a
|
||||
rol curr_ptr+1
|
||||
asl a
|
||||
rol curr_ptr+1
|
||||
asl a
|
||||
rol curr_ptr+1
|
||||
sta curr_ptr
|
||||
lda #>filenames
|
||||
clc
|
||||
adc curr_ptr+1
|
||||
sta curr_ptr+1
|
||||
ldy #0
|
||||
lda (curr_ptr),y
|
||||
sta curr_len
|
||||
rts
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc draw_current_line
|
||||
lda #2 ; hpos = 2
|
||||
sta COL80HPOS
|
||||
|
||||
ldx current_entry ; vpos = entry - page_start + 2
|
||||
txa
|
||||
sec
|
||||
sbc page_start
|
||||
inc a
|
||||
inc a
|
||||
jsr TABV
|
||||
|
||||
lda types_table,x
|
||||
bmi name ; is sys file?
|
||||
|
||||
;; Draw folder glyph
|
||||
stz COL80HPOS
|
||||
lda INVFLG
|
||||
pha
|
||||
ldy #(folder_string - string_start) ; Draw folder glyphs
|
||||
jsr cout_string
|
||||
pla
|
||||
sta INVFLG
|
||||
|
||||
;; Draw the name
|
||||
name: jsr space
|
||||
jsr update_curr_ptr
|
||||
loop: iny
|
||||
lda (curr_ptr),y
|
||||
jsr ascii_cout
|
||||
cpy curr_len
|
||||
bcc loop
|
||||
|
||||
space: lda #HI(' ')
|
||||
bne cout ; implicit RTS
|
||||
;; fall through
|
||||
.endproc
|
||||
|
||||
home: lda #HI(ASCII_EM) ; move cursor to top left
|
||||
|
||||
;; Sets high bit before calling COUT
|
||||
ascii_cout:
|
||||
ora #$80
|
||||
cout: jmp COUT
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc do_read
|
||||
MLI_CALL READ, read_params
|
||||
rts
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
string_start := *
|
||||
.proc help_string
|
||||
HIASCIIZ "RETURN: Select | TAB: Chg Vol | ESC: Back"
|
||||
.endproc
|
||||
|
||||
;; Mousetext sequence: Enable, folder left, folder right, disable
|
||||
.proc folder_string
|
||||
.byte $0F,$1B,$D8,$D9,$18,$0E
|
||||
.byte 0 ; null terminated
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc open_params
|
||||
params: .byte 3
|
||||
path: .addr prefix
|
||||
buffer: .addr $1C00
|
||||
ref_num:.byte 0
|
||||
.endproc
|
||||
open_params_ref_num := open_params::ref_num
|
||||
|
||||
.proc close_params
|
||||
params: .byte 1
|
||||
ref_num:.byte 0
|
||||
.endproc
|
||||
|
||||
.proc on_line_params
|
||||
params: .byte 2
|
||||
unit: .byte $60
|
||||
buffer: .addr prefix+1
|
||||
.endproc
|
||||
on_line_params_unit := on_line_params::unit
|
||||
|
||||
.proc set_prefix_params
|
||||
params: .byte 1
|
||||
path: .addr prefix
|
||||
.endproc
|
||||
|
||||
.proc read_params
|
||||
params: .byte 4
|
||||
ref_num:.byte 1
|
||||
buffer: .word read_buffer
|
||||
request:.word 0
|
||||
trans: .word 0
|
||||
.endproc
|
||||
read_params_ref_num := read_params::ref_num
|
||||
read_params_request := read_params::request
|
||||
|
||||
.assert read_params::request - bbb <= $300, error, "Must fit in $300 bytes"
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.res $13FF-*-2, 0
|
||||
.byte $48,$AD ; 72, 173 ???
|
||||
|
||||
.endproc
|
||||
.assert .sizeof(bbb) = $3FF, error, "Expected size is $3FF"
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Installer
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.org $2402
|
||||
|
||||
.proc install_and_quit
|
||||
jsr install
|
||||
MLI_CALL QUIT, params
|
||||
|
||||
.proc params
|
||||
params: .byte 4
|
||||
type: .byte 0
|
||||
res1: .word 0
|
||||
res2: .byte 0
|
||||
res3: .addr 0
|
||||
.endproc
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
.proc install
|
||||
src := install_src
|
||||
end := install_src + .sizeof(bbb)
|
||||
dst := $D100 ; Install location in ProDOS (bank 2)
|
||||
|
||||
src_ptr := $19
|
||||
dst_ptr := $1B
|
||||
|
||||
sta ALTZPOFF
|
||||
lda ROMIN
|
||||
lda ROMIN
|
||||
lda #>src
|
||||
sta src_ptr+1
|
||||
lda #<src
|
||||
sta src_ptr
|
||||
lda #>dst
|
||||
sta dst_ptr+1
|
||||
lda #<dst
|
||||
sta dst_ptr
|
||||
|
||||
loop: lda (src_ptr)
|
||||
sta (dst_ptr)
|
||||
inc src_ptr
|
||||
bne :+
|
||||
inc src_ptr+1
|
||||
: inc dst_ptr
|
||||
bne :+
|
||||
inc dst_ptr+1
|
||||
: lda src_ptr+1
|
||||
cmp #>end
|
||||
bne loop
|
||||
lda src_ptr
|
||||
cmp #<end
|
||||
bne loop
|
||||
lda (src_ptr) ; WTF??
|
||||
sta (dst_ptr)
|
||||
sta ALTZPOFF
|
||||
sta ROMINWB1
|
||||
sta ROMINWB1
|
||||
rts
|
||||
.endproc
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
|
||||
poporg
|
||||
reloc_end := *
|
||||
|
|
@ -0,0 +1,458 @@
|
|||
;;; ------------------------------------------------------------
|
||||
|
||||
;; SYS files load at $2000; relocates self to $1000
|
||||
.org SYS_ADDR
|
||||
dst_addr := $1000
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
jmp relocate
|
||||
|
||||
.byte MM, DD, YY ; version date stamp
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Relocate this code from $2000 (.SYSTEM start location) to $1000
|
||||
;;; and start executing there. This is done so that the next .SYSTEM
|
||||
;;; file can be loaded/run at $2000.
|
||||
|
||||
.proc relocate
|
||||
src := reloc_start
|
||||
dst := dst_addr
|
||||
|
||||
ldx #(reloc_end - reloc_start + $FF) / $100 ; pages
|
||||
ldy #0
|
||||
load: lda src,y ; self-modified
|
||||
load_hi := *-1
|
||||
sta dst,y ; self-modified
|
||||
store_hi := *-1
|
||||
iny
|
||||
bne load
|
||||
inc load_hi
|
||||
inc store_hi
|
||||
dex
|
||||
bne load
|
||||
|
||||
jmp main
|
||||
.endproc
|
||||
|
||||
;;; ============================================================
|
||||
;;; Start of relocated code
|
||||
|
||||
reloc_start := *
|
||||
pushorg dst_addr
|
||||
|
||||
;;; ============================================================
|
||||
;;; Main routine
|
||||
;;; ============================================================
|
||||
|
||||
.proc main
|
||||
jsr save_chain_info
|
||||
jsr init_system
|
||||
jsr maybe_install_driver
|
||||
jmp launch_next
|
||||
.endproc
|
||||
|
||||
;;; ============================================================
|
||||
;;; Preserve state needed to chain to next file
|
||||
;;; ============================================================
|
||||
|
||||
.proc save_chain_info
|
||||
;; --------------------------------------------------
|
||||
;; Save most recent device for later, when chaining
|
||||
;; to next .SYSTEM file.
|
||||
lda DEVNUM
|
||||
sta devnum
|
||||
|
||||
;; --------------------------------------------------
|
||||
;; Identify the name of this SYS file, which should be present at
|
||||
;; $280 with or without a path prefix. Search pathname buffer
|
||||
;; backwards for '/', then copy name into |self_name|.
|
||||
|
||||
;; Find '/' (which may not be present, prefix is optional)
|
||||
ldx PATHNAME
|
||||
beq no_name
|
||||
ldy #0 ; Y = length
|
||||
: lda PATHNAME,x
|
||||
and #$7f ; ignore high bit
|
||||
cmp #'/'
|
||||
beq copy_name
|
||||
iny
|
||||
dex
|
||||
bne :-
|
||||
|
||||
;; Copy name into |self_name| buffer
|
||||
copy_name:
|
||||
cpy #0
|
||||
beq no_name
|
||||
sty self_name
|
||||
|
||||
ldx PATHNAME
|
||||
: lda PATHNAME,x
|
||||
sta self_name,y
|
||||
dex
|
||||
dey
|
||||
bne :-
|
||||
|
||||
;; Done
|
||||
rts
|
||||
|
||||
no_name:
|
||||
lda #0
|
||||
sta self_name
|
||||
rts
|
||||
.endproc
|
||||
|
||||
devnum: .byte 0
|
||||
self_name: .res 16
|
||||
|
||||
;;; ============================================================
|
||||
;;; Init system state
|
||||
;;; ============================================================
|
||||
|
||||
;;; Before installing, get the system to a known state.
|
||||
|
||||
.proc init_system
|
||||
cld
|
||||
bit ROMIN2
|
||||
|
||||
;; Update reset vector - ProDOS QUIT
|
||||
lda #<quit
|
||||
sta $03F2
|
||||
lda #>quit
|
||||
sta $03F3
|
||||
eor #$A5
|
||||
sta $03F4
|
||||
|
||||
;; Quit 80-column firmware
|
||||
lda #$95 ; Ctrl+U (quit 80 col firmware)
|
||||
jsr COUT
|
||||
|
||||
;; Reset I/O
|
||||
sta CLR80VID
|
||||
sta CLRALTCHAR
|
||||
jsr SETVID
|
||||
jsr SETKBD
|
||||
jsr SETNORM
|
||||
jsr INIT
|
||||
jsr HOME
|
||||
|
||||
;; Update System Bit Map
|
||||
ldx #BITMAP_SIZE-1
|
||||
lda #%00000001 ; protect page $BF
|
||||
: sta BITMAP,x
|
||||
lda #%00000000 ; nothing else protected until...
|
||||
dex
|
||||
bne :-
|
||||
lda #%11001111 ; ZP ($00), stack ($01), text page 1 ($04-$07)
|
||||
sta BITMAP
|
||||
|
||||
;; Determine lowercase support
|
||||
lda MACHID
|
||||
and #$88 ; IIe or IIc (or IIgs) ?
|
||||
bne :+
|
||||
lda #$DF
|
||||
sta lowercase_mask ; lower case to upper case
|
||||
|
||||
: rts
|
||||
.endproc
|
||||
|
||||
;;; ============================================================
|
||||
;;; Find and invoke the next .SYSTEM file
|
||||
;;; ============================================================
|
||||
|
||||
online_buf := $1C00
|
||||
io_buf := $1C00
|
||||
dir_buf := $2000
|
||||
block_len = $200
|
||||
|
||||
DEFINE_ON_LINE_PARAMS on_line_params,,online_buf
|
||||
DEFINE_OPEN_PARAMS open_params, PATHNAME, io_buf
|
||||
DEFINE_READ_PARAMS read_params, SYS_ADDR, SYS_LEN
|
||||
DEFINE_READ_PARAMS read_block_params, dir_buf, block_len
|
||||
DEFINE_CLOSE_PARAMS close_params
|
||||
|
||||
|
||||
.proc launch_next
|
||||
;; Read directory and look for .SYSTEM files; find this
|
||||
;; one, and invoke the following one.
|
||||
|
||||
ptr := $A5
|
||||
num := $A7
|
||||
len := $A8
|
||||
|
||||
;; --------------------------------------------------
|
||||
;; Own name found? If not, just quit
|
||||
lda self_name
|
||||
bne :+
|
||||
jmp quit
|
||||
|
||||
;; --------------------------------------------------
|
||||
;; Find name of boot device, copy into PATHNAME
|
||||
: lda devnum
|
||||
sta on_line_params::unit_num
|
||||
MLI_CALL ON_LINE, on_line_params
|
||||
bcc :+
|
||||
jmp on_error
|
||||
|
||||
: lda #'/' ; Prefix by '/'
|
||||
sta PATHNAME+1
|
||||
lda online_buf
|
||||
and #$0F ; Mask off length
|
||||
sta PATHNAME
|
||||
ldx #0 ; Copy name
|
||||
: lda online_buf+1,x
|
||||
sta PATHNAME+2,x
|
||||
inx
|
||||
cpx PATHNAME
|
||||
bne :-
|
||||
inx ; One more for '/' prefix
|
||||
stx PATHNAME
|
||||
|
||||
;; Open directory
|
||||
MLI_CALL OPEN, open_params
|
||||
bcc :+
|
||||
jmp on_error
|
||||
: lda open_params::ref_num
|
||||
sta read_block_params::ref_num
|
||||
sta close_params::ref_num
|
||||
|
||||
;; Read first "block"
|
||||
MLI_CALL READ, read_block_params
|
||||
bcc :+
|
||||
jmp on_error
|
||||
|
||||
;; Get sizes out of header
|
||||
: lda dir_buf + VolumeDirectoryHeader::entry_length
|
||||
sta entry_length_mod
|
||||
lda dir_buf + VolumeDirectoryHeader::entries_per_block
|
||||
sta entries_per_block_mod
|
||||
lda #1
|
||||
sta num
|
||||
|
||||
;; Set up pointers to entry
|
||||
lda #<(dir_buf + .sizeof(VolumeDirectoryHeader))
|
||||
sta ptr
|
||||
lda #>(dir_buf + .sizeof(VolumeDirectoryHeader))
|
||||
sta ptr+1
|
||||
|
||||
;; Process directory entry
|
||||
entry: ldy #FileEntry::file_type ; file_type
|
||||
lda (ptr),y
|
||||
cmp #$FF ; type=SYS
|
||||
bne next
|
||||
ldy #FileEntry::storage_type_name_length
|
||||
lda (ptr),y
|
||||
and #$30 ; regular file (not directory, pascal)
|
||||
beq next
|
||||
lda (ptr),y
|
||||
and #$0F ; name_length
|
||||
sta len
|
||||
tay
|
||||
|
||||
;; Compare suffix - is it .SYSTEM?
|
||||
ldx suffix
|
||||
: lda (ptr),y
|
||||
cmp suffix,x
|
||||
bne next
|
||||
dey
|
||||
dex
|
||||
bne :-
|
||||
|
||||
;; Yes; is it *this* .SYSTEM file?
|
||||
ldy self_name
|
||||
cpy len
|
||||
bne handle_sys_file
|
||||
: lda (ptr),y
|
||||
cmp self_name,y
|
||||
bne handle_sys_file
|
||||
dey
|
||||
bne :-
|
||||
sec
|
||||
ror found_self_flag
|
||||
|
||||
;; Move to the next entry
|
||||
next: lda ptr
|
||||
clc
|
||||
adc #$27 ; self-modified: entry_length
|
||||
entry_length_mod := *-1
|
||||
sta ptr
|
||||
bcc :+
|
||||
inc ptr+1
|
||||
: inc num
|
||||
lda num
|
||||
cmp #$0D ; self-modified: entries_per_block
|
||||
entries_per_block_mod := *-1
|
||||
bcc entry
|
||||
|
||||
;; Read next "block"
|
||||
MLI_CALL READ, read_block_params
|
||||
bcs not_found
|
||||
|
||||
;; Set up pointers to entry
|
||||
lda #0
|
||||
sta num
|
||||
lda #<(dir_buf + $04)
|
||||
sta ptr
|
||||
lda #>(dir_buf + $04)
|
||||
sta ptr+1
|
||||
jmp entry
|
||||
|
||||
;; --------------------------------------------------
|
||||
;; Found a .SYSTEM file which is not this one; invoke
|
||||
;; it if follows this one.
|
||||
handle_sys_file:
|
||||
bit found_self_flag
|
||||
bpl next
|
||||
|
||||
MLI_CALL CLOSE, close_params
|
||||
|
||||
;; Compose the path to invoke.
|
||||
ldx PATHNAME
|
||||
inx
|
||||
lda #'/'
|
||||
sta PATHNAME,x
|
||||
ldy #0
|
||||
: iny
|
||||
inx
|
||||
lda (ptr),y
|
||||
sta PATHNAME,x
|
||||
cpy len
|
||||
bcc :-
|
||||
stx PATHNAME
|
||||
|
||||
jmp invoke_system_file
|
||||
|
||||
not_found:
|
||||
jsr zstrout
|
||||
scrcode "\r\r* Unable to find next '.SYSTEM' file *\r"
|
||||
.byte 0
|
||||
|
||||
bit KBDSTRB
|
||||
: lda KBD
|
||||
bpl :-
|
||||
bit KBDSTRB
|
||||
jmp quit
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Load/execute the system file in PATHNAME
|
||||
|
||||
.proc invoke_system_file
|
||||
MLI_CALL OPEN, open_params
|
||||
bcs on_error
|
||||
|
||||
lda open_params::ref_num
|
||||
sta read_params::ref_num
|
||||
sta close_params::ref_num
|
||||
|
||||
MLI_CALL READ, read_params
|
||||
bcs on_error
|
||||
|
||||
MLI_CALL CLOSE, close_params
|
||||
bcs on_error
|
||||
|
||||
jmp SYS_ADDR ; Invoke loaded SYSTEM file
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Error handler - invoked if any ProDOS error occurs.
|
||||
|
||||
.proc on_error
|
||||
pha
|
||||
jsr zstrout
|
||||
scrcode "\r\r* Disk Error $"
|
||||
.byte 0
|
||||
|
||||
pla
|
||||
jsr PRBYTE
|
||||
|
||||
jsr zstrout
|
||||
scrcode " *\r"
|
||||
.byte 0
|
||||
|
||||
bit KBDSTRB
|
||||
: lda KBD
|
||||
bpl :-
|
||||
bit KBDSTRB
|
||||
jmp quit
|
||||
.endproc
|
||||
|
||||
.proc quit
|
||||
MLI_CALL QUIT, quit_params
|
||||
brk ; crash if QUIT fails
|
||||
|
||||
DEFINE_QUIT_PARAMS quit_params
|
||||
.endproc
|
||||
|
||||
;;; ============================================================
|
||||
;;; Data
|
||||
|
||||
suffix:
|
||||
PASCAL_STRING ".SYSTEM"
|
||||
|
||||
found_self_flag:
|
||||
.byte 0
|
||||
|
||||
;;; ============================================================
|
||||
;;; Common Routines
|
||||
;;; ============================================================
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Output a high-ascii, null-terminated string.
|
||||
;;; String immediately follows the JSR.
|
||||
|
||||
.proc zstrout
|
||||
ptr := $A5
|
||||
|
||||
pla ; read address from stack
|
||||
sta ptr
|
||||
pla
|
||||
sta ptr+1
|
||||
bne skip ; always (since data not on ZP)
|
||||
|
||||
next: cmp #HI('a') ; lower-case?
|
||||
bcc :+
|
||||
and lowercase_mask ; make upper-case if needed
|
||||
: jsr COUT
|
||||
skip: inc ptr
|
||||
bne :+
|
||||
inc ptr+1
|
||||
: ldy #0
|
||||
lda (ptr),y
|
||||
bne next
|
||||
|
||||
lda ptr+1 ; restore address to stack
|
||||
pha
|
||||
lda ptr
|
||||
pha
|
||||
rts
|
||||
.endproc
|
||||
|
||||
lowercase_mask:
|
||||
.byte $FF ; Set to $DF on systems w/o lower-case
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; COUT a 2-digit number in A
|
||||
|
||||
.proc cout_number
|
||||
ldx #HI('0')
|
||||
cmp #10 ; >= 10?
|
||||
bcc tens
|
||||
|
||||
;; divide by 10, dividend(+'0') in x remainder in a
|
||||
: sbc #10
|
||||
inx
|
||||
cmp #10
|
||||
bcs :-
|
||||
|
||||
tens: pha
|
||||
cpx #HI('0')
|
||||
beq units
|
||||
txa
|
||||
jsr COUT
|
||||
|
||||
units: pla
|
||||
ora #HI('0')
|
||||
jsr COUT
|
||||
rts
|
||||
.endproc
|
||||
|
|
@ -0,0 +1,54 @@
|
|||
;;; ============================================================
|
||||
;;;
|
||||
;;; More Apple II Symbols
|
||||
;;;
|
||||
;;; ============================================================
|
||||
|
||||
;;; ============================================================
|
||||
;;; Soft Switches
|
||||
;;; ============================================================
|
||||
|
||||
RAMRDOFF := $C002
|
||||
RAMRDON := $C003
|
||||
RAMWRTOFF := $C004
|
||||
RAMWRTON := $C005
|
||||
ALTZPOFF := $C008
|
||||
ALTZPON := $C009
|
||||
|
||||
CLR80VID := $C00C
|
||||
SET80VID := $C00D
|
||||
RDALTZP := $C016
|
||||
RD80STORE := $C018
|
||||
RDPAGE2 := $C01C
|
||||
|
||||
BANKSEL := $C073 ; Select RamWorks bank
|
||||
|
||||
ROMIN2 := $C082 ; Read ROM; no write
|
||||
RWRAM1 := $C08B ; Read/write RAM bank 1
|
||||
|
||||
;;; ============================================================
|
||||
;;; I/O Registers (for Slot 2)
|
||||
;;; ============================================================
|
||||
|
||||
TDREG := $C088 + $20 ; ACIA Transmit Register (write)
|
||||
RDREG := $C088 + $20 ; ACIA Receive Register (read)
|
||||
STATUS := $C089 + $20 ; ACIA Status/Reset Register
|
||||
COMMAND := $C08A + $20 ; ACIA Command Register (read/write)
|
||||
CONTROL := $C08B + $20 ; ACIA Control Register (read/write)
|
||||
|
||||
;;; ============================================================
|
||||
;;; Monitor ROM routines
|
||||
;;; ============================================================
|
||||
|
||||
INIT := $FB2F
|
||||
HOME := $FC58
|
||||
GETLN := $FD6A ; with prompt character
|
||||
GETLN2 := $FD6F ; no prompt character
|
||||
CROUT := $FD8E
|
||||
PRBYTE := $FDDA
|
||||
COUT := $FDED
|
||||
SETNORM := $FE84
|
||||
SETKBD := $FE89
|
||||
SETVID := $FE93
|
||||
|
||||
INPUT_BUFFER := $200
|
||||
|
|
@ -0,0 +1,123 @@
|
|||
;;; ============================================================
|
||||
;;; Generic Macros
|
||||
;;; ============================================================
|
||||
|
||||
.define _is_immediate(arg) (.match (.mid (0, 1, {arg}), #))
|
||||
.define _is_register(arg) (.match ({arg}, x) .or .match ({arg}, y))
|
||||
.define _is_y_register(arg) (.match ({arg}, y))
|
||||
.define _immediate_value(arg) (.right (.tcount ({arg})-1, {arg}))
|
||||
|
||||
.macro _op_lo op, arg
|
||||
.if _is_immediate {arg}
|
||||
op #<_immediate_value {arg}
|
||||
.else
|
||||
op arg
|
||||
.endif
|
||||
.endmacro
|
||||
|
||||
.macro _op_hi op, arg
|
||||
.if _is_immediate {arg}
|
||||
op #>_immediate_value {arg}
|
||||
.else
|
||||
op arg+1
|
||||
.endif
|
||||
.endmacro
|
||||
|
||||
;;; ============================================================
|
||||
;;; Temporary org change, for relocated routines
|
||||
|
||||
__pushorg_depth__ .set 0
|
||||
|
||||
.macro pushorg addr
|
||||
::__pushorg_depth__ .set ::__pushorg_depth__ + 1
|
||||
.ident(.sprintf("__pushorg_saved__%d", ::__pushorg_depth__)) := *
|
||||
.org addr
|
||||
.ident(.sprintf("__pushorg_start__%d", ::__pushorg_depth__)) := *
|
||||
.endmacro
|
||||
|
||||
.macro poporg
|
||||
.org .ident(.sprintf("__pushorg_saved__%d", ::__pushorg_depth__)) + (* - .ident(.sprintf("__pushorg_start__%d", ::__pushorg_depth__)))
|
||||
::__pushorg_depth__ .set ::__pushorg_depth__ - 1
|
||||
.endmacro
|
||||
|
||||
;;; ============================================================
|
||||
;;; Length-prefixed string
|
||||
;;;
|
||||
;;; Can include control chars by using:
|
||||
;;;
|
||||
;;; PASCAL_STRING {"abc",$0D,"def"}
|
||||
|
||||
.macro PASCAL_STRING str,res
|
||||
.local data
|
||||
.local end
|
||||
.byte end - data
|
||||
data: .byte str
|
||||
end:
|
||||
.if .paramcount > 1
|
||||
.res res - (end - data), 0
|
||||
.endif
|
||||
.endmacro
|
||||
|
||||
|
||||
;;; ============================================================
|
||||
;;; Common patterns
|
||||
|
||||
.macro copy arg1, arg2, arg3, arg4
|
||||
.if _is_register {arg2} && _is_register {arg4}
|
||||
;; indexed load/indexed store
|
||||
lda arg1,arg2
|
||||
sta arg3,arg4
|
||||
.elseif _is_register {arg2}
|
||||
;; indexed load variant (arg2 is x or y)
|
||||
lda arg1,arg2
|
||||
sta arg3
|
||||
.elseif _is_register {arg3}
|
||||
;; indexed store variant (arg3 is x or y)
|
||||
lda arg1
|
||||
sta arg2,arg3
|
||||
.else
|
||||
lda arg1
|
||||
sta arg2
|
||||
.endif
|
||||
.endmacro
|
||||
|
||||
|
||||
|
||||
;;; Copy 16-bit value
|
||||
;;; copy16 #$1111, $2222 ; immediate, absolute
|
||||
;;; copy16 $1111, $2222 ; absolute, absolute
|
||||
;;; copy16 $1111,x, $2222 ; indirect load, absolute store
|
||||
;;; copy16 $1111, $2222,x ; absolute load, indirect store
|
||||
;;; copy16 $1111,x $2222,x ; indirect load, indirect store
|
||||
;;; copy16 #$1111, $2222,x ; immediate load, indirect store
|
||||
.macro copy16 arg1, arg2, arg3, arg4
|
||||
.if _is_register {arg2} && _is_register {arg4}
|
||||
;; indexed load/indexed store
|
||||
lda arg1,arg2
|
||||
sta arg3,arg4
|
||||
lda arg1+1,arg2
|
||||
sta arg3+1,arg4
|
||||
.elseif _is_register {arg2}
|
||||
;; indexed load variant (arg2 is x or y)
|
||||
lda arg1,arg2
|
||||
sta arg3
|
||||
lda arg1+1,arg2
|
||||
sta arg3+1
|
||||
.elseif _is_register {arg3}
|
||||
;; indexed store variant (arg3 is x or y)
|
||||
_op_lo lda, {arg1}
|
||||
sta arg2,arg3
|
||||
_op_hi lda, {arg1}
|
||||
sta arg2+1,arg3
|
||||
.else
|
||||
_op_lo lda, {arg1}
|
||||
sta arg2
|
||||
_op_hi lda, {arg1}
|
||||
sta arg2+1
|
||||
.endif
|
||||
.endmacro
|
||||
|
||||
;;; ============================================================
|
||||
|
||||
;;; Set the high bit on the passed byte
|
||||
.define HI(c) ((c)|$80)
|
||||
|
|
@ -0,0 +1,477 @@
|
|||
;;; ============================================================
|
||||
;;;
|
||||
;;; ProDOS MLI
|
||||
;;;
|
||||
;;; ============================================================
|
||||
|
||||
;;; Entry point / Global Page
|
||||
MLI := $BF00 ; Entry point
|
||||
DATETIME := $BF06 ; JMP to clock routine
|
||||
DEVADR := $BF10 ; Device driver addresses ($BF10-$BF2F)
|
||||
NODEV := $BF10 ; "No Device Connected" entry (slot 0)
|
||||
DEVNUM := $BF30 ; Most recent accessed device
|
||||
DEVCNT := $BF31 ; Number of on-line devices minus 1
|
||||
DEVLST := $BF32 ; Up to 14 units ($BF32-$BF3F)
|
||||
BITMAP := $BF58 ; System memory bitmap
|
||||
BITMAP_SIZE = $18 ; Bits for pages $00 to $BF
|
||||
DATELO := $BF90 ; Date lo
|
||||
DATEHI := $BF91 ; Date hi
|
||||
TIMELO := $BF92 ; Time lo
|
||||
TIMEHI := $BF93 ; Time hi
|
||||
LEVEL := $BF94 ; File level
|
||||
MACHID := $BF98 ; Machine ID
|
||||
SLTBYT := $BF99 ; '1' bits indicate rom in slot (bit#)
|
||||
IVERSION := $BFFD ; Interpreter Version
|
||||
KVERSION := $BFFF ; ProDOS Kernel Version
|
||||
|
||||
;;; Patch Locations
|
||||
SELECTOR := $D100
|
||||
|
||||
BLOCK_SIZE = $200
|
||||
|
||||
PATHNAME := $280
|
||||
SYS_ADDR := $2000 ; Load address for SYS files
|
||||
SYS_LEN = $BF00 - SYS_ADDR ; Maximum SYS file length
|
||||
|
||||
;;; ============================================================
|
||||
;;; MLI Calls
|
||||
;;; ============================================================
|
||||
|
||||
;;; Housekeeping Calls
|
||||
CREATE = $C0
|
||||
DESTROY = $C1
|
||||
RENAME = $C2
|
||||
SET_FILE_INFO = $C3
|
||||
GET_FILE_INFO = $C4
|
||||
ON_LINE = $C5
|
||||
SET_PREFIX = $C6
|
||||
GET_PREFIX = $C7
|
||||
|
||||
;;; Filing Calls
|
||||
OPEN = $C8
|
||||
NEWLINE = $C9
|
||||
READ = $CA
|
||||
WRITE = $CB
|
||||
CLOSE = $CC
|
||||
FLUSH = $CD
|
||||
SET_MARK = $CE
|
||||
GET_MARK = $CF
|
||||
SET_EOF = $D0
|
||||
GET_EOF = $D1
|
||||
SET_BUF = $D2
|
||||
GET_BUF = $D3
|
||||
|
||||
;;; System Calls
|
||||
GET_TIME = $82
|
||||
ALLOC_INTERRUPT = $40
|
||||
DEALLOC_INTERRUPT = $41
|
||||
QUIT = $65
|
||||
|
||||
;;; Direct Disk Access Commands
|
||||
READ_BLOCK = $80
|
||||
WRITE_BLOCK = $81
|
||||
|
||||
;;; ============================================================
|
||||
;;; File Types
|
||||
;;; ============================================================
|
||||
|
||||
FT_TYPELESS = $00
|
||||
FT_BAD = $01
|
||||
FT_TEXT = $04 ; ASCII Text File *
|
||||
FT_BINARY = $06 ; Generic Binary File *
|
||||
FT_GRAPHICS = $08 ; Graphics File
|
||||
FT_DIRECTORY = $0F ; Directory *
|
||||
FT_ADB = $19 ; AppleWorks Database *
|
||||
FT_AWP = $1A ; AppleWorks Word Processing *
|
||||
FT_ASP = $1B ; AppleWorks Spreadsheet *
|
||||
FT_SRC = $B0 ; IIgs system type; re-used?
|
||||
FT_S16 = $B3 ; IIgs Application Program
|
||||
FT_PAS = $EF ; Pascal Area *
|
||||
FT_CMD = $F0 ; ProDOS Command File *
|
||||
FT_INT = $FA ; Integer BASIC Program *
|
||||
FT_IVR = $FB ; Integer BASIC Variable File *
|
||||
FT_BASIC = $FC ; Applesoft BASIC Program *
|
||||
FT_VAR = $FD ; Applesoft BASIC Variable File *
|
||||
FT_REL = $FE ; EDASM/Contiki Relocatable File *
|
||||
FT_SYSTEM = $FF ; ProDOS System File *
|
||||
|
||||
;;; Types marked with * are known to BASIC.SYSTEM and have an
|
||||
;;; associated three-letter abbreviation.
|
||||
|
||||
;;; ============================================================
|
||||
;;; Access
|
||||
;;; ============================================================
|
||||
|
||||
ACCESS_DEFAULT = %11000011
|
||||
ACCESS_LOCKED = %00100001
|
||||
|
||||
;;; ============================================================
|
||||
;;; Storage Types
|
||||
;;; ============================================================
|
||||
|
||||
ST_STANDARD_FILE = $01
|
||||
ST_LINKED_DIRECTORY = $0D
|
||||
ST_VOLUME_DIRECTORY = $0F
|
||||
|
||||
;;; ============================================================
|
||||
;;; Errors
|
||||
;;; ============================================================
|
||||
|
||||
ERR_DEVICE_NOT_CONNECTED = $28
|
||||
ERR_WRITE_PROTECTED = $2B
|
||||
ERR_INVALID_PATHNAME = $40
|
||||
ERR_INVALID_REFERENCE = $43
|
||||
ERR_PATH_NOT_FOUND = $44
|
||||
ERR_VOL_NOT_FOUND = $45
|
||||
ERR_FILE_NOT_FOUND = $46
|
||||
ERR_DUPLICATE_FILENAME= $47
|
||||
ERR_OVERRUN_ERROR = $48
|
||||
ERR_VOLUME_DIR_FULL = $49
|
||||
ERR_END_OF_FILE = $4C
|
||||
ERR_ACCESS_ERROR = $4E
|
||||
ERR_DUPLICATE_VOLUME = $57
|
||||
ERR_NETWORK_ERROR = $88
|
||||
|
||||
;;; ============================================================
|
||||
;;; Directory Structures
|
||||
;;; ============================================================
|
||||
|
||||
STORAGE_TYPE_MASK = $F0
|
||||
NAME_LENGTH_MASK = $0F
|
||||
|
||||
;;; Volume Directory Header structure
|
||||
.struct VolumeDirectoryHeader
|
||||
prev_block .word
|
||||
next_block .word
|
||||
storage_type_name_length .byte
|
||||
file_name .byte 15
|
||||
reserved .byte 8
|
||||
creation_date .word
|
||||
creation_time .word
|
||||
version .byte
|
||||
min_version .byte
|
||||
access .byte
|
||||
entry_length .byte
|
||||
entries_per_block .byte
|
||||
file_count .word
|
||||
;; same through here ---------
|
||||
bit_map_pointer .word
|
||||
total_blocks .word
|
||||
.endstruct
|
||||
.assert .sizeof(VolumeDirectoryHeader) = $2B, error, "incorrect struct size"
|
||||
|
||||
;;; Subdirectory Header structure
|
||||
.struct SubdirectoryHeader
|
||||
prev_block .word
|
||||
next_block .word
|
||||
storage_type_name_length .byte
|
||||
file_name .byte 15
|
||||
reserved .byte 8
|
||||
creation_date .word
|
||||
creation_time .word
|
||||
version .byte
|
||||
min_version .byte
|
||||
access .byte
|
||||
entry_length .byte
|
||||
entries_per_block .byte
|
||||
file_count .word
|
||||
;; same through here ---------
|
||||
parent_pointer .word
|
||||
parent_entry_number .byte
|
||||
parent_entry_length .byte
|
||||
.endstruct
|
||||
.assert .sizeof(SubdirectoryHeader) = $2B, error, "incorrect struct size"
|
||||
|
||||
;; File Entry structure
|
||||
.struct FileEntry
|
||||
storage_type_name_length .byte
|
||||
file_name .byte 15
|
||||
file_type .byte
|
||||
key_pointer .word
|
||||
blocks_used .word
|
||||
eof .faraddr
|
||||
creation_date .word
|
||||
creation_time .word
|
||||
version .byte
|
||||
min_version .byte
|
||||
access .byte
|
||||
aux_type .word
|
||||
mod_date .word
|
||||
mod_time .word
|
||||
header_pointer .word
|
||||
.endstruct
|
||||
.assert .sizeof(FileEntry) = $27, error, "incorrect struct size"
|
||||
|
||||
;;; ============================================================
|
||||
;;; ProDOS Driver Protocol
|
||||
;;; ============================================================
|
||||
|
||||
;;; Addresses for command parameters
|
||||
DRIVER_COMMAND := $42
|
||||
DRIVER_UNIT_NUMBER := $43
|
||||
DRIVER_BUFFER := $44
|
||||
DRIVER_BLOCK_NUMBER := $46
|
||||
|
||||
;;; Commands
|
||||
DRIVER_COMMAND_STATUS = 0
|
||||
DRIVER_COMMAND_READ = 1
|
||||
DRIVER_COMMAND_WRITE = 2
|
||||
DRIVER_COMMAND_FORMAT = 3
|
||||
|
||||
|
||||
;;; ============================================================
|
||||
;;; Macros
|
||||
;;; ============================================================
|
||||
|
||||
.macro MLI_CALL op, addr
|
||||
jsr MLI
|
||||
.byte op
|
||||
.addr addr
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_OPEN_PARAMS name, pn, io, rn
|
||||
.if .xmatch(.string(pn), "pathname")
|
||||
;; If 'pathname' is passed then expansion yields a circular reference.
|
||||
.error "Can't pass 'pathname' label to DEFINE_*_PARAMS"
|
||||
.endif
|
||||
.if .xmatch(.string(io), "io_buffer")
|
||||
.error "Can't pass 'io_buffer' label to DEFINE_*_PARAMS"
|
||||
.endif
|
||||
.proc name
|
||||
param_count: .byte 3
|
||||
pathname: .addr pn
|
||||
io_buffer: .addr io
|
||||
.ifnblank rn
|
||||
ref_num: .byte rn
|
||||
.else
|
||||
ref_num: .byte 0
|
||||
.endif
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_READ_PARAMS name, db, rc
|
||||
.proc name
|
||||
param_count: .byte 4
|
||||
ref_num: .byte 0
|
||||
data_buffer: .addr db
|
||||
request_count: .word rc
|
||||
trans_count: .word 0
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_WRITE_PARAMS name, db, rc
|
||||
.proc name
|
||||
param_count: .byte 4
|
||||
ref_num: .byte 0
|
||||
data_buffer: .addr db
|
||||
request_count: .word rc
|
||||
trans_count: .word 0
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_CLOSE_PARAMS name
|
||||
.proc name
|
||||
param_count: .byte 1
|
||||
ref_num: .byte 0
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_FLUSH_PARAMS name
|
||||
.proc name
|
||||
param_count: .byte 1
|
||||
ref_num: .byte 0
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_GET_FILE_INFO_PARAMS name, pn
|
||||
.if .xmatch(.string(pn), "pathname")
|
||||
;; If 'pathname' is passed then expansion yields a circular reference.
|
||||
.error "Can't pass 'pathname' label to DEFINE_*_PARAMS"
|
||||
.endif
|
||||
.proc name
|
||||
param_count: .byte $A
|
||||
pathname: .addr pn
|
||||
access: .byte 0
|
||||
file_type: .byte 0
|
||||
aux_type: .word 0
|
||||
storage_type: .byte 0
|
||||
blocks_used: .word 0
|
||||
mod_date: .word 0
|
||||
mod_time: .word 0
|
||||
create_date: .word 0
|
||||
create_time: .word 0
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_SET_MARK_PARAMS name, pos
|
||||
.proc name
|
||||
param_count: .byte 2
|
||||
ref_num: .byte 0
|
||||
position: .faraddr pos
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_ON_LINE_PARAMS name, un, db
|
||||
.proc name
|
||||
param_count: .byte 2
|
||||
|
||||
.ifnblank un
|
||||
unit_num: .byte un
|
||||
.else
|
||||
unit_num: .byte 0
|
||||
.endif
|
||||
|
||||
data_buffer: .addr db
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_READ_BLOCK_PARAMS name, db, bn
|
||||
.proc name
|
||||
param_count: .byte 3
|
||||
unit_num: .byte 0
|
||||
data_buffer: .addr db
|
||||
block_num: .word bn
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
|
||||
.macro DEFINE_WRITE_BLOCK_PARAMS name, db, bn
|
||||
.proc name
|
||||
param_count: .byte 3
|
||||
unit_num: .byte 0
|
||||
data_buffer: .addr db
|
||||
block_num: .word bn
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_ALLOC_INTERRUPT_PARAMS name, ic
|
||||
.proc alloc_interrupt_params
|
||||
param_count: .byte 2
|
||||
int_num: .byte 0
|
||||
int_code: .addr ic
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_DEALLOC_INTERRUPT_PARAMS name
|
||||
.proc dealloc_interrupt_params
|
||||
param_count: .byte 1
|
||||
int_num: .byte 0
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_QUIT_PARAMS name, ext, pathname
|
||||
.proc name
|
||||
param_count: .byte 4
|
||||
.ifnblank ext
|
||||
.byte ext
|
||||
.else
|
||||
.byte 0
|
||||
.endif
|
||||
.ifnblank pathname
|
||||
.word pathname
|
||||
.else
|
||||
.word 0
|
||||
.endif
|
||||
.byte 0
|
||||
.word 0
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_SET_PREFIX_PARAMS name, pn
|
||||
.if .xmatch(.string(pn), "pathname")
|
||||
;; If 'pathname' is passed then expansion yields a circular reference.
|
||||
.error "Can't pass 'pathname' label to DEFINE_*_PARAMS"
|
||||
.endif
|
||||
.proc name
|
||||
param_count: .byte 1
|
||||
pathname: .addr pn
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_GET_PREFIX_PARAMS name, pn
|
||||
.if .xmatch(.string(pn), "pathname")
|
||||
;; If 'pathname' is passed then expansion yields a circular reference.
|
||||
.error "Can't pass 'pathname' label to DEFINE_*_PARAMS"
|
||||
.endif
|
||||
.proc name
|
||||
param_count: .byte 1
|
||||
pathname: .addr pn
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_DESTROY_PARAMS name, pn
|
||||
.if .xmatch(.string(pn), "pathname")
|
||||
;; If 'pathname' is passed then expansion yields a circular reference.
|
||||
.error "Can't pass 'pathname' label to DEFINE_*_PARAMS"
|
||||
.endif
|
||||
.proc name
|
||||
param_count: .byte 1
|
||||
pathname: .addr pn
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_CREATE_PARAMS name, pn, ac, ft, at, st
|
||||
.if .xmatch(.string(pn), "pathname")
|
||||
;; If 'pathname' is passed then expansion yields a circular reference.
|
||||
.error "Can't pass 'pathname' label to DEFINE_*_PARAMS"
|
||||
.endif
|
||||
.proc name
|
||||
param_count: .byte 7
|
||||
pathname: .addr pn
|
||||
|
||||
.ifnblank ac
|
||||
access: .byte ac
|
||||
.else
|
||||
access: .byte 0
|
||||
.endif
|
||||
|
||||
.ifnblank ft
|
||||
file_type: .byte ft
|
||||
.else
|
||||
file_type: .byte 0
|
||||
.endif
|
||||
|
||||
.ifnblank at
|
||||
aux_type: .word at
|
||||
.else
|
||||
aux_type: .word 0
|
||||
.endif
|
||||
|
||||
.ifnblank st
|
||||
storage_type: .byte st
|
||||
.else
|
||||
storage_type: .byte 0
|
||||
.endif
|
||||
|
||||
create_date: .word 0
|
||||
create_time: .word 0
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_SET_EOF_PARAMS name, eo
|
||||
.proc name
|
||||
param_count: .byte 2
|
||||
ref_num: .byte 0
|
||||
eof: .faraddr eo
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_GET_EOF_PARAMS name
|
||||
.proc name
|
||||
param_count: .byte 2
|
||||
ref_num: .byte 0
|
||||
eof: .faraddr 0
|
||||
.endproc
|
||||
.endmacro
|
||||
|
||||
.macro DEFINE_RENAME_PARAMS name, pn, np
|
||||
.if .xmatch(.string(pn), "pathname")
|
||||
;; If 'pathname' is passed then expansion yields a circular reference.
|
||||
.error "Can't pass 'pathname' label to DEFINE_*_PARAMS"
|
||||
.endif
|
||||
.proc name
|
||||
param_count: .byte 2
|
||||
pathname: .addr pn
|
||||
new_pathname: .addr np
|
||||
.endproc
|
||||
.endmacro
|
||||
|
|
@ -0,0 +1,102 @@
|
|||
;;; ------------------------------------------------------------
|
||||
;;; ProDOS MLI
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; ProDOS Global Page
|
||||
|
||||
MLI := $BF00 ; Entry point
|
||||
DEVNUM := $BF30 ; Most recent accessed device
|
||||
DEVCNT := $BF31 ; Number of on-line devices minus 1
|
||||
DEVLST := $BF32 ; Up to 14 units
|
||||
BITMAP := $BF58
|
||||
BITMAP_SIZE := $18 ; Bits for pages $00 to $BF
|
||||
DATELO := $BF90 ; Date lo
|
||||
DATEHI := $BF91 ; Date hi
|
||||
TIMELO := $BF92 ; Time lo
|
||||
TIMEHI := $BF93 ; Time hi
|
||||
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; MLI Calls
|
||||
|
||||
;;; Housekeeping Calls
|
||||
CREATE := $C0
|
||||
DESTROY := $C1
|
||||
RENAME := $C2
|
||||
SET_FILE_INFO := $C3
|
||||
GET_FILE_INFO := $C4
|
||||
ON_LINE := $C5
|
||||
SET_PREFIX := $C6
|
||||
GET_PREFIX := $C7
|
||||
|
||||
;;; Filing Calls
|
||||
OPEN := $C8
|
||||
NEWLINE := $C9
|
||||
READ := $CA
|
||||
WRITE := $CB
|
||||
CLOSE := $CC
|
||||
FLUSH := $CD
|
||||
SET_MARK := $CE
|
||||
GET_MARK := $CF
|
||||
SET_EOF := $D0
|
||||
GET_EOF := $D1
|
||||
SET_BUF := $D2
|
||||
GET_BUF := $D3
|
||||
|
||||
;;; System Calls
|
||||
GET_TIME := $82
|
||||
ALLOC_INTERRUPT := $40
|
||||
DEALLOC_INTERRUPT := $41
|
||||
QUIT := $65
|
||||
|
||||
;;; Direct Disk Access Commands
|
||||
READ_BLOCK := $80
|
||||
WRITE_BLOCK := $71
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; File Types
|
||||
|
||||
FT_TYPELESS := $00
|
||||
FT_BAD := $01
|
||||
FT_TEXT := $04
|
||||
FT_BINARY := $06
|
||||
FT_DIRECTORY := $0F
|
||||
FT_SRC := $B0 ; IIgs system type; re-used?
|
||||
FT_BASIC := $FC
|
||||
FT_SYSTEM := $FF
|
||||
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Macros
|
||||
|
||||
.macro MLI_CALL op, addr
|
||||
jsr MLI
|
||||
.byte op
|
||||
.addr addr
|
||||
.endmacro
|
||||
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Structures
|
||||
|
||||
.scope DirectoryHeader
|
||||
entry_length := $23
|
||||
entries_per_block := $24
|
||||
file_count := $25
|
||||
|
||||
size := $2B
|
||||
.endscope
|
||||
|
||||
.scope FileEntry
|
||||
storage_type := $00 ; high nibble
|
||||
name_length := $00 ; low nibble
|
||||
file_name := $01
|
||||
file_type := $10
|
||||
access := $1E
|
||||
.endscope
|
||||
|
||||
.scope FileType
|
||||
Directory := $0F
|
||||
System := $FF
|
||||
.endscope
|
||||
|
|
@ -0,0 +1,35 @@
|
|||
|
||||
.setcpu "6502"
|
||||
.include "apple2.inc"
|
||||
.include "prodos.inc"
|
||||
|
||||
.org $2000
|
||||
|
||||
CLR80VID := $C00C
|
||||
ROMIN2 := $C082
|
||||
SETVID := $FE93
|
||||
SETKBD := $FE89
|
||||
INIT := $FB2F
|
||||
HOME := $FC58
|
||||
SETNORM := $FE84
|
||||
|
||||
cld
|
||||
bit ROMIN2
|
||||
sta CLR80VID
|
||||
sta CLRALTCHAR
|
||||
sta CLR80COL
|
||||
jsr SETVID
|
||||
jsr SETKBD
|
||||
jsr SETNORM
|
||||
jsr INIT
|
||||
jsr HOME
|
||||
|
||||
MLI_CALL QUIT, quit_params
|
||||
brk
|
||||
|
||||
quit_params:
|
||||
.byte 4
|
||||
.byte 0
|
||||
.word 0
|
||||
.byte 0
|
||||
.word 0
|
||||
Loading…
Reference in New Issue