a2d/desk.acc/show.image.file.s
2018-11-17 20:34:17 -08:00

700 lines
16 KiB
ArmAsm

.setcpu "65C02"
.include "apple2.inc"
.include "../inc/apple2.inc"
.include "../inc/prodos.inc"
.include "../mgtk.inc"
.include "../desktop.inc"
.include "../macros.inc"
;;; ============================================================
.org $800
start: jmp copy2aux
save_stack:.byte 0
;;; Copy $800 through $13FF (the DA) to aux
.proc copy2aux
tsx
stx save_stack
sta RAMWRTON
ldy #0
src: lda start,y ; self-modified
dst: sta start,y ; self-modified
dey
bne src
sta RAMWRTOFF
inc src+2
inc dst+2
sta RAMWRTON
lda dst+2
cmp #$14
bne src
.endproc
call_main_trampoline := $20 ; installed on ZP, turns off auxmem and calls...
call_main_addr := call_main_trampoline+7 ; address patched in here
;;; Copy the following "call_main_template" routine to $20
.scope
sta RAMWRTON
sta RAMRDON
ldx #sizeof_routine
loop: lda routine,x
sta call_main_trampoline,x
dex
bpl loop
jmp call_init
.endscope
.proc routine
sta RAMRDOFF
sta RAMWRTOFF
jsr $1000 ; overwritten (in zp version)
sta RAMRDON
sta RAMWRTON
rts
.endproc
sizeof_routine := * - routine ; can't .sizeof(proc) before declaration
;; https://github.com/cc65/cc
.proc call_init
;; run the DA
jsr init
;; tear down/exit
sta ALTZPON
lda LCBANK1
lda LCBANK1
sta RAMRDOFF
sta RAMWRTOFF
ldx save_stack
txs
rts
.endproc
;;; ============================================================
;;; ProDOS MLI calls
.proc open_file
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL OPEN, open_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
.proc get_file_eof
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL GET_EOF, get_eof_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
.proc read_file
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL READ, read_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
.proc close_file
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL CLOSE, close_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
;;; ============================================================
;;; Copies param blocks from Aux to Main
.proc copy_params_aux_to_main
ldy #(params_end - params_start + 1)
sta RAMWRTOFF
loop: lda params_start - 1,y
sta params_start - 1,y
dey
bne loop
sta RAMRDOFF
rts
.endproc
;;; Copies param blocks from Main to Aux
.proc copy_params_main_to_aux
pha
php
sta RAMWRTON
ldy #(params_end - params_start + 1)
loop: lda params_start - 1,y
sta params_start - 1,y
dey
bne loop
sta RAMRDON
plp
pla
rts
.endproc
;;; ----------------------------------------
params_start:
;;; This block gets copied between main/aux
;;; ProDOS MLI param blocks
hires := $2000
hires_size := $2000
DEFINE_OPEN_PARAMS open_params, pathbuff, $C00
DEFINE_GET_EOF_PARAMS get_eof_params
DEFINE_READ_PARAMS read_params, hires, hires_size
DEFINE_CLOSE_PARAMS close_params
.proc pathbuff ; 1st byte is length, rest is full path
length: .byte $00
data: .res 64, 0
.endproc
params_end:
;;; ----------------------------------------
da_window_id := 100
.proc line_pos
left: .word 0
base: .word 0
.endproc
.proc event_params ; queried to track mouse-up
kind: .byte $00
;;; if state is MGTK::EventKind::key_down
key := *
modifiers := *+1
;;; otherwise
xcoord := *
ycoord := *+2
.res 4 ; space for both
.endproc
default_width := 560
default_height := 192
default_left := 0
default_top := 0
.proc window_title
.byte 0 ; length
.endproc
.proc winfo
window_id: .byte da_window_id ; window identifier
options: .byte MGTK::Option::dialog_box
title: .addr window_title
hscroll:.byte MGTK::Scroll::option_none
vscroll:.byte MGTK::Scroll::option_none
hthumbmax: .byte 32
hthumbpos: .byte 0
vthumbmax: .byte 32
vthumbpos: .byte 0
status: .byte 0
reserved: .byte 0
mincontwidth: .word default_width
mincontlength: .word default_height
maxcontwidth: .word default_width
maxcontlength: .word default_height
.proc port
viewloc: DEFINE_POINT default_left, default_top
mapbits: .addr MGTK::screen_mapbits
mapwidth: .word MGTK::screen_mapwidth
maprect: DEFINE_RECT 0, 0, default_width, default_height
.endproc
pattern:.res 8, 0
colormasks: .byte MGTK::colormask_and, MGTK::colormask_or
penloc: DEFINE_POINT 0, 0
penwidth: .byte 1
penheight: .byte 1
penmode: .byte 0
textback: .byte $7F
textfont: .addr DEFAULT_FONT
nextwinfo: .addr 0
.endproc
.proc init
sta ALTZPON
lda LCBANK1
lda LCBANK1
lda #0
sta mode
;; Get filename by checking DeskTop selected window/icon
;; Check that an icon is selected
lda #0
sta pathbuff::length
lda selected_file_count
beq abort ; some file properties?
lda path_index ; prefix index in table
bne :+
abort: rts
;; Copy path (prefix) into pathbuff buffer.
: src := $06
dst := $08
asl a ; (since address table is 2 bytes wide)
tax
copy16 path_table,x, src
ldy #0
lda (src),y
tax
inc src
bne :+
inc src+1
: copy16 #(pathbuff::data), dst
jsr copy_pathbuff ; copy x bytes (src) to (dst)
;; Append separator.
lda #'/'
ldy #0
sta (dst),y
inc pathbuff::length
inc dst
bne :+
inc dst+1
;; Get file entry.
: lda selected_file_list ; file index in table
asl a ; (since table is 2 bytes wide)
tax
copy16 file_table,x, src
;; Exit if a directory.
ldy #2 ; 2nd byte of entry
lda (src),y
and #$70 ; check that one of bits 4,5,6 is set ???
;; some vague patterns, but unclear
;; basic = $32,$33, text = $52, sys = $11,$14,??, bin = $23,$24,$33
;; dir = $01 (so not shown)
bne :+
rts ; abort ???
;; Append filename to path.
: ldy #9
lda (src),y ; grab length
tax ; name has spaces before/after
dex ; so subtract 2 to get actual length
dex
clc
lda src
adc #11 ; 9 = length, 10 = space, 11 = name
sta src
bcc :+
inc src+1
: jsr copy_pathbuff ; copy x bytes (src) to (dst)
jmp open_file_and_init_window
.proc copy_pathbuff ; copy x bytes from src to dst
ldy #0 ; incrementing path length and dst
loop: lda (src),y
sta (dst),y
iny
inc pathbuff::length
dex
bne loop
tya
clc
adc dst
sta dst
bcc end
inc dst+1
end: rts
.endproc
.endproc
.proc open_file_and_init_window
jsr open_file
lda open_params::ref_num
sta get_eof_params::ref_num
sta read_params::ref_num
sta close_params::ref_num
MGTK_CALL MGTK::HideCursor
jsr stash_menu
MGTK_CALL MGTK::OpenWindow, winfo
MGTK_CALL MGTK::SetPort, winfo::port
jsr set_color_mode
jsr show_file
MGTK_CALL MGTK::ShowCursor
MGTK_CALL MGTK::FlushEvents
MGTK_CALL MGTK::ObscureCursor
;; fall through
.endproc
;;; ============================================================
;;; Main Input Loop
.proc input_loop
MGTK_CALL MGTK::GetEvent, event_params
lda event_params::kind
cmp #MGTK::EventKind::button_down ; was clicked?
beq exit
cmp #MGTK::EventKind::key_down ; any key?
beq on_key
bne input_loop
on_key:
lda event_params::modifiers
bne input_loop
lda event_params::key
cmp #CHAR_ESCAPE
beq exit
cmp #' '
bne :+
jsr toggle_mode
: jmp input_loop
exit:
jsr set_bw_mode
MGTK_CALL MGTK::HideCursor
MGTK_CALL MGTK::CloseWindow, winfo
DESKTOP_CALL DT_REDRAW_ICONS
jsr unstash_menu
MGTK_CALL MGTK::ShowCursor
rts ; exits input loop
.endproc
.proc show_file
jsr get_file_eof
;; If bigger than $2000, assume DHR
lda get_eof_params::eof ; fancy 3-byte unsigned compare
cmp #<(hires_size+1)
lda get_eof_params::eof+1
sbc #>(hires_size+1)
lda get_eof_params::eof+2
sbc #^(hires_size+1)
bcs dhr
jsr show_hr_file
jmp close
dhr: jsr show_dhr_file
close: jsr close_file
rts
.endproc
.proc show_hr_file
sta PAGE2OFF
jsr read_file
jsr close_file
jsr hr_to_dhr
rts
.endproc
.proc show_dhr_file
;; AUX memory half
sta PAGE2ON
jsr read_file
;; MAIN memory half
sta PAGE2OFF
jsr read_file
;; TODO: Restore PAGE2 state?
rts
.endproc
;;; ============================================================
;;; Convert single hires to double hires
;;; Assumes the image is loaded to MAIN $2000 and
;;; relies on the hr_to_dhr.inc table.
.proc hr_to_dhr
ptr := $06
rows := 192
cols := 40
spill := $08 ; spill-over
lda #0 ; row
rloop: pha
tax
lda hires_table_lo,x
sta ptr
lda hires_table_hi,x
sta ptr+1
ldy #cols-1 ; col
lda #0
sta spill ; spill-over
cloop: lda (ptr),y
tax
bmi hibitset
;; complex case - need to spill in bit from prev col and store
lda hr_to_dhr_aux,x
sta PAGE2ON
sta (ptr),y
lda hr_to_dhr_main,x
ora spill ; apply previous spill bit (to bit 6)
sta PAGE2OFF
sta (ptr),y
ror ; move high bit to bit 6
and #(1 << 6)
sta spill
jmp next
hibitset:
;; simple case - no bit spillage
lda hr_to_dhr_aux,x
sta PAGE2ON
sta (ptr),y
lda hr_to_dhr_main,x
sta PAGE2OFF
sta (ptr),y
lda #0 ; no spill bit
sta spill
next:
dey
bpl cloop
pla
inc
cmp #rows
bne rloop
;; TODO: Restore PAGE2 state?
done: sta PAGE2OFF
rts
.endproc
;;; ============================================================
;;; Stash/Unstash Menu Bar
;;; Have not yet figured out how to force the menu to
;;; redraw, so instead we save the top 13 rows of the
;;; screen to a scratch buffer and restore after
;;; destroying the window.
stash := $1200 ; Past DA code
rows = 13
cols = 40
.proc stash_menu
src := $08
dst := $06
copy16 #stash, dst
sta PAGE2ON
jsr inner
sta PAGE2OFF
inner:
lda #0 ; row #
rloop: pha
tax
lda hires_table_lo,x
sta src
lda hires_table_hi,x
sta src+1
ldy #cols-1
cloop: lda (src),y
sta (dst),y
dey
bpl cloop
clc ; src += cols
lda src
adc #<cols
sta src
lda src+1
adc #>cols
sta src+1
clc ; dst += cols
lda dst
adc #<cols
sta dst
lda dst+1
adc #>cols
sta dst+1
pla
inc
cmp #rows
bcc rloop
rts
.endproc
.proc unstash_menu
src := $08
dst := $06
copy16 #stash, src
sta PAGE2ON
jsr inner
sta PAGE2OFF
inner:
lda #0 ; row #
rloop: pha
tax
lda hires_table_lo,x
sta dst
lda hires_table_hi,x
sta dst+1
ldy #cols-1
cloop: lda (src),y
sta (dst),y
dey
bpl cloop
clc ; src += cols
lda src
adc #<cols
sta src
lda src+1
adc #>cols
sta src+1
clc ; dst += cols
lda dst
adc #<cols
sta dst
lda dst+1
adc #>cols
sta dst+1
pla
inc
cmp #rows
bcc rloop
rts
.endproc
;;; ============================================================
;;; Color/B&W Toggle
mode: .byte 0 ; 0 = B&W, $80 = color
.proc toggle_mode
lda mode
bne set_bw_mode
;; fall through
.endproc
.proc set_color_mode
lda mode
bne done
lda #$80
sta mode
;; AppleColor Card - Mode 2 (Color 140x192)
sta SET80VID
lda AN3_OFF
lda AN3_ON
lda AN3_OFF
lda AN3_ON
lda AN3_OFF
;; IIgs?
jsr test_iigs
bcc iigs
;; Le Chat Mauve - COL140 mode
;; (AN3 off, HR1 off, HR2 off, HR3 off)
;; Skip on IIgs since emulators (KEGS/GSport/GSplus) crash.
sta HR2_OFF
sta HR3_OFF
bcs done
;; Apple IIgs - DHR Color
iigs: lda NEWVIDEO
and #<~(1<<5) ; Color
sta NEWVIDEO
done: rts
.endproc
.proc set_bw_mode
lda mode
beq done
lda #0
sta mode
;; AppleColor Card - Mode 1 (Monochrome 560x192)
sta CLR80VID
lda AN3_OFF
lda AN3_ON
lda AN3_OFF
lda AN3_ON
sta SET80VID
lda AN3_OFF
;; IIgs?
jsr test_iigs
bcc iigs
;; Le Chat Mauve - BW560 mode
;; (AN3 off, HR1 off, HR2 on, HR3 on)
;; Skip on IIgs since emulators (KEGS/GSport/GSplus) crash.
sta HR2_ON
sta HR3_ON
bcs done
;; Apple IIgs - DHR B&W
iigs: lda NEWVIDEO
ora #(1<<5) ; B&W
sta NEWVIDEO
done: rts
.endproc
;;; Returns with carry clear if IIgs, set otherwise.
.proc test_iigs
lda ROMIN2
sec
jsr ID_BYTE_FE1F
lda LCBANK1
lda LCBANK1
rts
.endproc
.include "inc/hires_table.inc"
.include "inc/hr_to_dhr.inc"