mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-08-20 06:29:39 +00:00
467 lines
6.8 KiB
ArmAsm
467 lines
6.8 KiB
ArmAsm
;============================
|
|
; Draw Lineart around edges
|
|
;============================
|
|
setup_edges:
|
|
lda FORTYCOL
|
|
bne fortycol_lineart
|
|
|
|
eightycol_lineart:
|
|
|
|
; Draw top line
|
|
|
|
lda #' '+$80
|
|
sta dal_first+1
|
|
lda #'-'+$80
|
|
sta dal_second+1
|
|
jsr draw_ascii_line
|
|
|
|
; Draw columns
|
|
|
|
ldy #20
|
|
|
|
lda #'|'+$80
|
|
sta dal_first+1
|
|
lda #' '+$80
|
|
sta dal_second+1
|
|
line_loop:
|
|
jsr draw_ascii_line
|
|
dey
|
|
bne line_loop
|
|
|
|
; Draw bottom line
|
|
|
|
lda #' '+$80
|
|
sta dal_first+1
|
|
lda #'-'+$80
|
|
sta dal_second+1
|
|
jsr draw_ascii_line
|
|
|
|
jsr word_bounds
|
|
|
|
rts
|
|
|
|
fortycol_lineart:
|
|
|
|
jsr word_bounds
|
|
rts
|
|
|
|
|
|
;=====================
|
|
; Draw ascii line art
|
|
;
|
|
; trashes A,X
|
|
|
|
draw_ascii_line:
|
|
|
|
dal_first:
|
|
lda #'|'+$80
|
|
jsr COUT1
|
|
|
|
ldx #38
|
|
dal_second:
|
|
lda #' '+$80
|
|
dal_loop:
|
|
jsr COUT1
|
|
dex
|
|
bne dal_loop
|
|
|
|
lda dal_first+1
|
|
jsr COUT1
|
|
|
|
lda #13+$80
|
|
jsr COUT1
|
|
|
|
rts
|
|
|
|
|
|
;=============================
|
|
; Draw ASCII art
|
|
;=============================
|
|
; Eventually will be LZ4 encoded to save room
|
|
; It's 7063 bytes of data unencoded
|
|
; A is which one to draw
|
|
draw_ascii_art:
|
|
|
|
|
|
sty TEMPY
|
|
|
|
asl ; point to ascii art we want
|
|
tay
|
|
dey
|
|
dey
|
|
|
|
lda ascii_art,Y
|
|
sta OUTL
|
|
lda ascii_art+1,Y
|
|
sta OUTH
|
|
|
|
lda FORTYCOL
|
|
bne fortycol_ascii_art
|
|
|
|
;======================================================================
|
|
;======================================================================
|
|
eightycol_ascii_art:
|
|
|
|
ldy #2 ; put it at line 1 (2-byte addresses)
|
|
|
|
|
|
art_line_loop80:
|
|
|
|
lda #$00
|
|
sta DRAW_PAGE
|
|
|
|
clc
|
|
lda gr_offsets,Y ; load offset of line
|
|
adc #20 ; start second half of screen
|
|
sta GBASL
|
|
lda gr_offsets+1,Y
|
|
sta GBASH
|
|
|
|
iny
|
|
iny
|
|
sty YY
|
|
|
|
ldy #0
|
|
ascii_loop80:
|
|
lda (OUTL),Y ; see if done
|
|
beq done_ascii_total80
|
|
|
|
cmp #13+$80 ; see if line feed
|
|
beq done_ascii_line80
|
|
|
|
jsr store80
|
|
iny
|
|
jmp ascii_loop80
|
|
done_ascii_line80:
|
|
iny
|
|
tya ; bump art pointer by Y
|
|
clc
|
|
adc OUTL
|
|
sta OUTL
|
|
lda #0
|
|
adc OUTH
|
|
sta OUTH
|
|
|
|
lda #' '+$80
|
|
ascii_pad80: ; pad out with spaces for 40 columns
|
|
cpy #41
|
|
bcs done_pad80
|
|
jsr store80
|
|
iny
|
|
jmp ascii_pad80
|
|
|
|
done_pad80:
|
|
ldy YY ; load Y value
|
|
jmp art_line_loop80
|
|
|
|
done_ascii_total80:
|
|
|
|
ldy TEMPY
|
|
rts
|
|
|
|
;======================
|
|
store80:
|
|
sty DISP_PAGE
|
|
ldy #0
|
|
bit DRAW_PAGE
|
|
bmi store80_odd
|
|
store80_even:
|
|
bit PAGE1
|
|
sta (GBASL),Y
|
|
dec DRAW_PAGE
|
|
jmp store80_done
|
|
store80_odd:
|
|
bit PAGE0
|
|
sta (GBASL),Y
|
|
inc GBASL
|
|
inc DRAW_PAGE
|
|
store80_done:
|
|
ldy DISP_PAGE
|
|
rts
|
|
|
|
;======================================================================
|
|
;======================================================================
|
|
fortycol_ascii_art:
|
|
|
|
ldy #8 ; put it at line 4 (2-byte addresses)
|
|
|
|
art_line_loop:
|
|
lda gr_offsets,Y ; load offset of line
|
|
sta GBASL
|
|
lda gr_offsets+1,Y
|
|
sta GBASH
|
|
|
|
iny
|
|
iny
|
|
sty YY
|
|
|
|
ldy #0
|
|
ascii_loop:
|
|
lda (OUTL),Y ; see if done
|
|
beq done_ascii_total
|
|
|
|
cmp #13+$80 ; see if line feed
|
|
beq done_ascii_line
|
|
|
|
sta (GBASL),Y ; if not, just draw
|
|
|
|
iny ; point to next char
|
|
|
|
jmp ascii_loop
|
|
done_ascii_line:
|
|
iny
|
|
tya ; bump art pointer by Y
|
|
clc
|
|
adc OUTL
|
|
sta OUTL
|
|
lda #0
|
|
adc OUTH
|
|
sta OUTH
|
|
|
|
lda #' '+$80
|
|
ascii_pad: ; pad out with spaces for 40 columns
|
|
cpy #40
|
|
bcs done_pad
|
|
sta (GBASL),Y
|
|
iny
|
|
jmp ascii_pad
|
|
|
|
done_pad:
|
|
ldy YY ; load Y value
|
|
jmp art_line_loop
|
|
|
|
done_ascii_total:
|
|
|
|
ldy TEMPY
|
|
rts
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
.if 0
|
|
|
|
;=======================
|
|
; art update y
|
|
; set output to point at right row on screen
|
|
|
|
|
|
art_update_y:
|
|
pha
|
|
sty TEMPY ; save Y (FIXME: always 0? so no need to save)
|
|
; (just set to 0 when done?)
|
|
|
|
ldy YY
|
|
lda gr_offsets,Y ; load offset of line
|
|
sta GBASL
|
|
lda gr_offsets+1,Y
|
|
sta GBASH
|
|
|
|
iny
|
|
iny
|
|
sty YY
|
|
|
|
ldy TEMPY
|
|
pla
|
|
rts
|
|
|
|
|
|
|
|
; LZ4 decode Art
|
|
; Based on Code by Peter Ferrie (qkumba) (peter.ferrie@gmail.com)
|
|
|
|
;======================
|
|
; LZ4 decode art
|
|
;======================
|
|
; input buffer in LZ4_SRC
|
|
; output buffer is both $800 (graphics page2, for delta lookups)
|
|
; as well as screen
|
|
|
|
lz4_decode_art:
|
|
draw_ascii_art:
|
|
|
|
asl ; point to ascii art we want
|
|
tay
|
|
dey
|
|
dey
|
|
|
|
lda ascii_art,Y
|
|
sta LZ4_SRC
|
|
lda ascii_art+1,Y
|
|
sta LZ4_SRC+1
|
|
|
|
lda #0 ; store output to $800
|
|
sta LZ4_DST
|
|
lda #8
|
|
sta LZ4_DST+1
|
|
|
|
; Also write to graphics mem
|
|
ldy #8 ; Start at line 4 (2-byte addresses)
|
|
sty YY
|
|
jsr art_update_y
|
|
|
|
|
|
; begin LZ4 code
|
|
art_unpmain:
|
|
ldy #0 ; used to index, always zero
|
|
sty LZ4_DONE
|
|
|
|
art_parsetoken:
|
|
jsr getsrc ; get next token
|
|
pha ; save for later (need bottom 4 bits)
|
|
|
|
lsr ; number of literals in top 4 bits
|
|
lsr ; so shift into place
|
|
lsr
|
|
lsr
|
|
beq art_copymatches ; if zero, then no literals
|
|
; jump ahead and copy
|
|
|
|
jsr buildcount ; add up all the literal sizes
|
|
; result is in ram[count+1]-1:A
|
|
tax ; now in ram[count+1]-1:X
|
|
jsr docopy_art ; copy the literals
|
|
|
|
; we end on 0, not on size
|
|
|
|
lda LZ4_DONE
|
|
bne done_lz4_art
|
|
|
|
; lda LZ4_SRC ; 16-bit compare
|
|
; cmp LZ4_END ; to see if we have reached the end
|
|
; lda LZ4_SRC+1
|
|
; sbc LZ4_END+1
|
|
; bcs done_lz4_art
|
|
|
|
art_copymatches:
|
|
|
|
jsr getsrc ; get 16-bit delta value
|
|
sta DELTA
|
|
jsr getsrc
|
|
sta DELTA+1
|
|
|
|
pla ; restore token
|
|
and #$0f ; get bottom 4 bits
|
|
; match count. 0 means 4
|
|
; 15 means 19+, must be calculated
|
|
|
|
jsr buildcount ; add up count bits, in ram[count+1]-:A
|
|
|
|
clc
|
|
adc #4 ; adjust count by 4 (minmatch)
|
|
|
|
tax ; now in ramp[count+1]-1:X
|
|
|
|
beq art_copy_no_adjust ; BUGFIX, don't increment if
|
|
; exactly a multiple of 0x100
|
|
bcc art_copy_no_adjust
|
|
|
|
inc COUNT+1 ; increment if we overflowed
|
|
art_copy_no_adjust:
|
|
|
|
lda LZ4_SRC+1 ; save src on stack
|
|
pha
|
|
lda LZ4_SRC
|
|
pha
|
|
|
|
sec ; subtract delta
|
|
lda LZ4_DST ; from destination, make new src
|
|
sbc DELTA
|
|
sta LZ4_SRC
|
|
lda LZ4_DST+1
|
|
sbc DELTA+1
|
|
sta LZ4_SRC+1
|
|
|
|
jsr docopy_art ; do the copy
|
|
|
|
pla ; restore the src
|
|
sta LZ4_SRC
|
|
pla
|
|
sta LZ4_SRC+1
|
|
|
|
jmp art_parsetoken ; back to parsing tokens
|
|
|
|
done_lz4_art:
|
|
pla
|
|
rts
|
|
|
|
|
|
;============
|
|
; getput_art
|
|
;============
|
|
; gets a byte, then puts the byte
|
|
getput_art:
|
|
jsr getsrc
|
|
; fallthrough to putdst
|
|
|
|
;=============
|
|
; putdst_art
|
|
;=============
|
|
; store A into destination
|
|
putdst_art:
|
|
cmp #0
|
|
bne putdst_check_cr
|
|
|
|
lda #1
|
|
sta LZ4_DONE
|
|
rts
|
|
|
|
putdst_check_cr:
|
|
cmp #13+$80
|
|
bne putdst_normal_art
|
|
|
|
jsr art_update_y ; FIXME: inline?
|
|
jmp putdst_notext_art
|
|
|
|
putdst_normal_art:
|
|
sta (GBASL), Y ; store to text page
|
|
|
|
inc GBASL ; increment 16-bit pointer
|
|
bne putdst_end_art2 ; if overflow, increment top byte
|
|
inc GBASL+1
|
|
putdst_end_art2:
|
|
|
|
putdst_notext_art:
|
|
sta (LZ4_DST), Y ; store A into destination
|
|
|
|
inc LZ4_DST ; increment 16-bit pointer
|
|
bne putdst_end_art ; if overflow, increment top byte
|
|
inc LZ4_DST+1
|
|
putdst_end_art:
|
|
|
|
rts
|
|
|
|
;=============================
|
|
; docopy_art
|
|
;=============================
|
|
; copies ram[count+1]-1:X bytes
|
|
; from src to dst
|
|
docopy_art:
|
|
|
|
docopy_loop_art:
|
|
jsr getput_art ; get/put byte
|
|
dex ; decrement count
|
|
bne docopy_loop_art ; if not zero, loop
|
|
dec COUNT+1 ; if zero, decrement high byte
|
|
bne docopy_loop_art ; if not zero, loop
|
|
|
|
rts
|
|
.endif
|