702 lines
19 KiB
ArmAsm
702 lines
19 KiB
ArmAsm
;;; Enhancements to the 80-column ProDOS 8 Selector ("BYE") found in
|
|
;;; ProDOS 1.9 and 2.0.x.
|
|
;;;
|
|
;;; Modifications by Joshua Bell inexorabletash@gmail.com
|
|
;;; * 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"
|
|
.include "../inc/ascii.inc"
|
|
|
|
;;; ************************************************************
|
|
.include "../inc/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
|
|
;;; ------------------------------------------------------------
|
|
|
|
max_size = $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 ; TODO: Necessary?
|
|
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 ; TODO: Necessary?
|
|
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
|
|
cur_device_num := $65 ; 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 := $6A ; number of rows in this page
|
|
top_row := 2 ; first row used on screen
|
|
bottom_row := 21 ; last row used on screen
|
|
|
|
|
|
;;; ------------------------------------------------------------
|
|
|
|
cld ; ProDOS protocol for QUIT routine
|
|
lda ROMIN2 ; Page in ROM for reads, writes ignored
|
|
|
|
bit KBDSTRB ; Clear keyboard strobe
|
|
|
|
lda #$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
|
|
ldx DEVCNT
|
|
: lda DEVLST,x
|
|
and #%11110000
|
|
cmp DEVNUM
|
|
beq check_device
|
|
dex
|
|
bra :-
|
|
|
|
next_device:
|
|
ldx cur_device_num
|
|
dex
|
|
bpl :+
|
|
ldx DEVCNT
|
|
: lda DEVLST,x
|
|
|
|
check_device:
|
|
stx cur_device_num
|
|
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 :-
|
|
; storage_type/name_length in A
|
|
and #%00001111 ; mask off name_length (remove storage_type)
|
|
sta (curr_ptr) ; 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
|
|
bcc :+
|
|
inc 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 COL80HPOS
|
|
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
|
|
lda (curr_ptr)
|
|
sta curr_len
|
|
ldy #0 ; needed by caller
|
|
;; 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
|
|
|
|
;; Work around MouseText deactivation bug on Franklin ACE 2X00/500
|
|
;; The Apple IIe/IIc/IIgs and the Franklin ACE 2X00/500 all use the
|
|
;; screen hole address $4FB to store a video firmware operating
|
|
;; mode byte, e.g. whether or not MouseText output is active. For
|
|
;; the Apple IIe and IIgs, see the Apple IIe Technical Reference
|
|
;; Manual, Appendix J Monitor Firmware Listing for the definition.
|
|
;; (Bit 0 is set when MouseText is inactive and clear when active.)
|
|
;; The Apple IIc also uses bit 0 the same way, but bits 3 and 7 are
|
|
;; also normally set. The Franklin Ace 2X00 and 500 set bit 6
|
|
;; when MouseText mode is activated by printing $1B, but fails to
|
|
;; clear it when printing $18, so MouseText remains active. This
|
|
;; seems to be a bug in the firmware. Work around it by detecting
|
|
;; the unique byte signature left behind and resetting it.
|
|
lda $4FB ; $4FB = $30 normally (V flag clear)
|
|
cmp #$40 ; $4FB = $70 if MT is active (V flag set)
|
|
bne :+ ; $4FB = $40 if you try to disable MT!
|
|
lda #$30 ; Bug in firmware? We're not sure yet.
|
|
sta $4FB ; Any way, set it manually.
|
|
:
|
|
|
|
;; 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) <= max_size, error, .sprintf("Must fit in $300 bytes, is: $%x", .sizeof(selector))
|
|
install_size = .sizeof(selector)
|
|
poporg
|
|
|
|
;;; ************************************************************
|
|
.include "../inc/driver_postamble.inc"
|
|
;;; ************************************************************
|