Apple-2-SW/prodos-drivers
1
0
Fork 0
mirror of https://github.com/a2stuff/prodos-drivers.git synced 2024-11-19 17:31:30 +00:00
Code Issues Projects Releases Wiki Activity
73ac9cbfc0
prodos-drivers/selectors/selector.system.s

500 lines
12 KiB
ArmAsm
Raw Normal View History

Rejiggered the selectors, added actual 40-column Bird's Better Bye. I discovered that Bird's Better Bye and the ProDOS 1.9 selector are different. Documentation updated with the history to the best of my knowledge.
2020-12-23 22:35:08 +00:00
;;; Disassembly of ProDOS QUIT handler (program selector)
;;; This is a 40-column selector that prompts for prefix/pathname,
;;; installed by default except on 80-column systems in 1.9 and
;;; later.
;;;
;;; Installer wrapper added by Joshua Bell inexorabletash@gmail.com
Add SELECTOR.SYSTEM capturing the behavior of ProDOS 1.x. Fixes #5 Mostly just for historical interest.
2020-12-21 04:30:30 +00:00
.setcpu "6502"
.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
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: ldy #0
lda (src_ptr),y
sta (dst_ptr),y
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),y
sta (dst_ptr),y
sta ALTZPOFF
sta ROMINWB1
sta ROMINWB1
rts
.endproc
;;; ------------------------------------------------------------
;;; Selector
;;; ------------------------------------------------------------
install_src := *
pushorg $1000
.proc selector
PREFIX := $280
;;; ============================================================
;;; Code
;;; ============================================================
;; Page in normal banks, reset screen to 40 columns.
lda ROMIN2
sta CLR80VID
sta CLRALTCHAR
sta CLR80COL
jsr SETNORM
jsr INIT
jsr SETVID
jsr SETKBD
;; Clear system bitmap
ldx #$17
lda #$01
sta BITMAP,x
dex
lda #$00
: sta BITMAP,x
dex
bpl :-
lda #$CF
sta BITMAP
;;; ============================================================
.proc PromptForPrefix
jsr HOME
jsr CROUT
ldx #msg_enter_prefix
jsr ShowMessage
lda #$03
sta CV
jsr CROUT
MLI_CALL GET_PREFIX, get_prefix_params
ldx PREFIX
lda #$00
sta $0281,x
ldx PREFIX
beq L105D
L1052: lda PREFIX,x
ora #$80
sta $05FF,x
dex
bne L1052
L105D: ldx #$00
dec CV
jsr CROUT
input_loop:
jsr RDKEY
cmp #HI(ASCII_CR)
beq try_set_prefix
pha
jsr CLREOL
pla
cmp #HI(ASCII_ESCAPE)
beq PromptForPrefix
cmp #HI(ASCII_CLEAR)
reprompt_for_prefix: ; used as a relay
beq PromptForPrefix
cmp #HI(ASCII_TAB)
beq bad_prefix_key
cmp #HI(ASCII_DELETE)
beq :+
cmp #HI(ASCII_LEFT)
bne not_backspace
: cpx #$00
beq :+
dec CH
dex
: jsr CLREOL
jmp input_loop
not_backspace:
bcs maybe_alphanumeric
bad_prefix_key:
jsr BELL
jmp input_loop
maybe_alphanumeric:
cmp #HI('Z')+1
bcc :+
and #%11011111 ; convert uppercase to lowercase
: cmp #HI('.')
bcc bad_prefix_key
cmp #HI('Z')+1
bcs bad_prefix_key
cmp #HI('9')+1
bcc :+
cmp #HI('A')
bcc bad_prefix_key
;; Place character, if it fits
: inx
cpx #39 ; screen max
bcs reprompt_for_prefix
sta PREFIX,x
jsr COUT
jmp input_loop
try_set_prefix:
cpx #0
beq PromptForPathname
stx PREFIX
MLI_CALL SET_PREFIX, get_prefix_params
bcc PromptForPathname
jsr BELL
lda #$00
reprompt_for_prefix_relay:
beq reprompt_for_prefix ; used as a relay
.endproc
;;; ============================================================
.proc PromptForPathname
jsr HOME
jsr CROUT
ldx #msg_enter_pathname
jsr ShowMessage
reset_pathname:
lda #3
sta CV
jsr CROUT
ldx #0
input_loop:
jsr RDKEY
cmp #HI(ASCII_ESCAPE)
bne :+
lda CH
bne PromptForPathname
beq PromptForPrefix::reprompt_for_prefix_relay
: cmp #HI(ASCII_CLEAR)
reprompt_for_pathname: ; used as a relay
beq PromptForPathname
cmp #HI(ASCII_TAB)
beq bad_pathname_key
cmp #HI(ASCII_DELETE)
beq :+
cmp #HI(ASCII_LEFT)
bne not_backspace2
: jmp backspace
not_backspace2:
bcs maybe_alphanumeric2
bad_pathname_key:
jsr BELL
jmp input_loop
maybe_alphanumeric2:
cmp #HI(ASCII_CR)
beq try_launch_file
cmp #HI('Z')+1
bcc :+
and #%11011111 ; convert uppercase to lowercase
: cmp #HI('.')
bcc bad_pathname_key
cmp #HI('Z')+1
bcs bad_pathname_key
cmp #HI('9')+1
bcc :+
cmp #HI('A')
bcc bad_pathname_key
;; Place character, if it fits
: pha
jsr CLREOL
pla
jsr COUT
inx
cpx #39 ; screen max
bcs reprompt_for_pathname
sta PREFIX,x
jmp input_loop
;;; --------------------------------------------------
try_launch_file:
lda #HI(' ')
jsr COUT
stx PREFIX
MLI_CALL GET_FILE_INFO, get_file_info_params
bcc :+
jmp HandleError
: lda get_file_info_file_type
cmp #FT_SYSTEM
beq :+
lda #$01
jmp HandleError
: lda #$00
sta close_ref_num
MLI_CALL CLOSE, close_params
bcc :+
jmp HandleError
: lda get_file_info_access
and #$01
bne :+
lda #ERR_IO_ERROR
jmp HandleError
: MLI_CALL OPEN, open_params
bcc :+
jmp HandleError
: lda open_ref_num
sta read_ref_num
sta get_eof_ref_num
MLI_CALL GET_EOF, get_eof_params
bcs HandleError
lda get_eof_eof+2
beq :+
lda #ERR_IO_ERROR
bne HandleError
: lda get_eof_eof
sta read_request_count
lda get_eof_eof+1
sta read_request_count+1
MLI_CALL READ, read_params
php
MLI_CALL CLOSE, close_params
bcc launch
: plp
bne HandleError
plp
launch: bcs :-
jmp SYS_ADDR
backspace:
lda CH
beq :+
dex
lda #HI(' ')
jsr COUT
dec CH
dec CH
jsr COUT
dec CH
: jmp input_loop
.endproc
;;; ============================================================
.proc ShowMessage
loop: lda message_table,x
beq done
jsr COUT
inx
bne loop
done: rts
.endproc
;;; ============================================================
.proc HandleError
tmp := $DE
sta tmp
lda #12
sta CV
jsr CROUT
lda tmp
cmp #$01
bne :+
ldx #msg_not_sys
bne show ; always
: cmp #ERR_INVALID_PATHNAME
beq not_found
cmp #ERR_PATH_NOT_FOUND
beq not_found
cmp #ERR_VOL_NOT_FOUND
beq not_found
cmp #ERR_FILE_NOT_FOUND
beq not_found
ldx #msg_io_error
bne show
not_found:
ldx #msg_not_found
show: jsr ShowMessage
jmp PromptForPathname::reset_pathname
.endproc
;;; ============================================================
;;; Messages
;;; ============================================================
message_table:
msg_enter_prefix := * - message_table
scrcode "ENTER PREFIX (PRESS \"RETURN\" TO ACCEPT)"
.byte 0
msg_enter_pathname := * - message_table
scrcode "ENTER PATHNAME OF NEXT APPLICATION"
.byte 0
msg_not_sys := * - message_table
.byte HI(ASCII_BELL)
scrcode "NOT A TYPE \"SYS\" FILE"
.byte 0
msg_io_error := * - message_table
.byte HI(ASCII_BELL)
scrcode "I/O ERROR "
.byte 0
msg_not_found := * - message_table
.byte HI(ASCII_BELL)
scrcode "FILE/PATH NOT FOUND "
.byte 0
;;; ============================================================
;;; ProDOS MLI Call Parameters
;;; ============================================================
;;; GET_FILE_INFO params
get_file_info_params:
.byte $A
get_file_info_pathname:
.addr PREFIX
get_file_info_access:
.byte 0
get_file_info_file_type:
.byte 0
get_file_info_aux_type: .word 0
get_file_info_storage_type: .byte 0
get_file_info_blocks_used: .word 0
get_file_info_mod_date: .word 0
get_file_info_mod_time: .word 0
get_file_info_create_date: .word 0
get_file_info_create_time: .word 0
;;; OPEN params
open_params:
.byte 3
open_pathname:
.addr PREFIX
open_io_buffer:
.addr $1800
open_ref_num:
.byte 0
;;; CLOSE params
close_params:
.byte 1
close_ref_num:
.byte 0
;;; READ params
read_params:
.byte 4
read_ref_num:
.byte 0
read_data_buffer:
.addr SYS_ADDR
read_request_count:
.word 0
read_trans_count:
.word 0
;;; GET_EOF params
get_eof_params:
.byte 2
get_eof_ref_num:
.byte 0
get_eof_eof:
.faraddr 0
;;; GET_PREFIX params
get_prefix_params:
.byte 1
get_prefix_pathname:
.addr PREFIX
;;; ============================================================
.endproc
install_size = $300
poporg
;;; ************************************************************
.include "../inc/driver_postamble.inc"
;;; ************************************************************
Reference in New Issue Copy Permalink