mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-01 01:06:33 +00:00
658 lines
11 KiB
ArmAsm
658 lines
11 KiB
ArmAsm
mod7_table = $1c00
|
|
div7_table = $1d00
|
|
hposn_low = $1e00
|
|
hposn_high = $1f00
|
|
|
|
|
|
;==========================
|
|
; draw box scene
|
|
;==========================
|
|
; data in INL/INH
|
|
|
|
SET_COLOR = $C0 ; special case, color 0..15 in bottom nybble
|
|
|
|
END = $80 ; 0 :
|
|
CLEAR = $81 ; 0 : clear screen to black (0)
|
|
BOX = $82 ; 4 : x1,y1 to x2,y2
|
|
HLIN = $83 ; 3 : x1,x2 at y1
|
|
VLIN = $84 ; 3 : at x1 from y1 to y2
|
|
PLOT = $85 ; 2 : x1,y1
|
|
HLIN_ADD= $86 ; 2 : x1,x2 at prev_y1+1
|
|
HLIN_ADD_LSAME= $87 ; 1 : prev_x1,x2 at prev_y1+1
|
|
HLIN_ADD_RSAME= $88 ; 1 : x1,prev_x2 at prev_y1+1
|
|
BOX_ADD= $89 ; 3 : x1,prev_y1+1, x2, y2
|
|
BOX_ADD_LSAME= $8A ; 2 : prev_x1,prev_y1+1, x2, y2
|
|
BOX_ADD_RSAME= $8B ; 2 : x1,prev_y1+1, prev_x2, y2
|
|
VLIN_ADD= $8C ; 2 : at prev_x1+1 from y1 to y2
|
|
|
|
BLACK = $00
|
|
RED = $01
|
|
DARK_BLUE = $02
|
|
MAGENTA = $03
|
|
GREEN = $04
|
|
GREY1 = $05
|
|
MEDIUM_BLUE = $06
|
|
LIGHT_BLUE = $07
|
|
BROWN = $08
|
|
ORANGE = $09
|
|
GREY2 = $0A
|
|
PINK = $0B
|
|
LIGHT_GREEN = $0C
|
|
YELLOW = $0D
|
|
AQUA = $0E
|
|
WHITE = $0f
|
|
|
|
; top bit not set, command
|
|
; top bit set, repeat last command
|
|
|
|
|
|
; ??xx xxxx
|
|
|
|
; 00 = co-ord
|
|
; 10 = new command
|
|
; 11 = new-color
|
|
|
|
|
|
draw_scene:
|
|
|
|
lda #0 ; always clear to black
|
|
; sta COLOR
|
|
sta clear_all_color+1
|
|
jsr clear_all
|
|
|
|
draw_scene_loop:
|
|
|
|
wait_delay_smc:
|
|
lda #200
|
|
jsr wait
|
|
|
|
ldy #0
|
|
lda (INL),Y ; load next byte
|
|
|
|
bpl repeat_last ; if top bit 0, repeat last
|
|
; command
|
|
|
|
asl ; clear top bit
|
|
bmi set_color ; if negative, color
|
|
lsr ; shift back down
|
|
|
|
sta LAST_TYPE ; store last type
|
|
|
|
jsr inc_inl ; 16 bit increment
|
|
|
|
repeat_last:
|
|
lda LAST_TYPE
|
|
|
|
beq done_scene ; if 0, END
|
|
|
|
|
|
; use jump table for rest
|
|
and #$3f
|
|
tax
|
|
dex ; types start at 1
|
|
lda draw_table_h,X
|
|
sta table_jsr_smc+2
|
|
; pha
|
|
lda draw_table_l,X
|
|
; pha
|
|
sta table_jsr_smc+1
|
|
|
|
table_jsr_smc:
|
|
jsr $FFFF
|
|
|
|
;========================================
|
|
; adds A to input pointer and continues
|
|
update_pointer:
|
|
ldx LAST_TYPE
|
|
lda bytes_used,X
|
|
|
|
update_pointer_already_in_a:
|
|
clc
|
|
adc INL
|
|
sta INL
|
|
lda #0
|
|
adc INH
|
|
sta INH
|
|
bcc draw_scene_loop ; bra (would only be set if wrap $FFFF)
|
|
|
|
|
|
;============================
|
|
; done scene
|
|
;============================
|
|
; return
|
|
done_scene:
|
|
rts
|
|
|
|
|
|
;============================
|
|
; set color
|
|
;============================
|
|
; color is A*2h
|
|
|
|
set_color:
|
|
; make top and bottom byte the same
|
|
|
|
lsr ; shift back down
|
|
and #$f
|
|
sta COLOR
|
|
asl
|
|
asl
|
|
asl
|
|
asl
|
|
adc COLOR
|
|
sta COLOR
|
|
|
|
; special case as we are encoded differently from
|
|
; the actions
|
|
|
|
lda #1 ; we were one byte long
|
|
bne update_pointer_already_in_a ; bra
|
|
|
|
bytes_used:
|
|
.byte 0,0,4,3 ; END, CLEAR, BOX, HLIN
|
|
.byte 3,2,2,1 ; VLIN, PLOT, HLIN_ADD, HLIN_ADD_LSAME
|
|
.byte 1,3,2,2 ; HLIN_ADD_RSAME, BOX_ADD, BOX_ADD_LSAME
|
|
.byte 2,2 ; BOX_ADD_RSAME, VLIN_ADD
|
|
|
|
draw_table_l:
|
|
.byte <(clear_screen),<(draw_box),<(draw_hlin),<(draw_vlin)
|
|
.byte <(draw_plot)
|
|
.byte <(draw_hlin_add),<(draw_hlin_add_lsame),<(draw_hlin_add_rsame)
|
|
.byte <(draw_box_add),<(draw_box_add_lsame),<(draw_box_add_rsame)
|
|
.byte <(draw_vlin_add)
|
|
draw_table_h:
|
|
.byte >(clear_screen),>(draw_box),>(draw_hlin),>(draw_vlin)
|
|
.byte >(draw_plot)
|
|
.byte >(draw_hlin_add),>(draw_hlin_add_lsame),>(draw_hlin_add_rsame)
|
|
.byte >(draw_box_add),>(draw_box_add_lsame),>(draw_box_add_rsame)
|
|
.byte >(draw_vlin_add)
|
|
|
|
;=================================
|
|
;=================================
|
|
; clear screen
|
|
;=================================
|
|
;=================================
|
|
clear_screen:
|
|
lda COLOR
|
|
sta clear_all_color+1
|
|
jmp clear_all ; tail call
|
|
|
|
;=================================
|
|
;=================================
|
|
; draw box
|
|
;=================================
|
|
;=================================
|
|
|
|
; blurgh. Cases
|
|
; Y1=EVEN, Y2=ODD -> loop Y1/2 to Y2/2, inclusive
|
|
; Y1=ODD, Y2=ODD -> HLIN, loop (Y1/2)+1 to Y2/2 inclusive
|
|
; Y1=EVEN, Y2=EVEN-> loop Y1/2 to (Y2/2)-1, HLIN
|
|
; Y1=ODD, Y2=EVEN -> HLIN, loop (Y1/2)+1 to (Y2/2)-1, HLIN
|
|
; 2/3 case, 1 to 1
|
|
; 3/5 case, (>1) 2 to 2
|
|
; 2/4 case, 1 to 1 (<2)
|
|
; 3/4 case, 2 to 1 (!)
|
|
; 3/6 case, 2 to 2
|
|
draw_box:
|
|
lda (INL),Y
|
|
sta X1
|
|
iny
|
|
lda (INL),Y
|
|
sta Y1
|
|
iny
|
|
|
|
draw_box_common_x2:
|
|
|
|
lda (INL),Y
|
|
sta X2
|
|
|
|
;==================================
|
|
; draw box common
|
|
;==================================
|
|
|
|
draw_box_common:
|
|
iny
|
|
lda (INL),Y
|
|
sta Y2 ; keep even though not necessary
|
|
|
|
lsr
|
|
; if even, go to one less
|
|
; else, fine
|
|
bcs odd_bottom_draw_box
|
|
even_bottom_draw_box:
|
|
sec
|
|
sbc #1
|
|
|
|
odd_bottom_draw_box:
|
|
|
|
sta draw_box_yend_smc+1
|
|
|
|
; see if we start at multiple of two
|
|
|
|
lda Y1
|
|
lsr
|
|
tay
|
|
bcc even_draw_box_start
|
|
|
|
; we're odd, need to call HLIN
|
|
|
|
jsr hlin_mask_odd
|
|
iny
|
|
|
|
|
|
even_draw_box_start:
|
|
|
|
draw_box_yloop:
|
|
|
|
draw_box_yend_smc:
|
|
cpy #0
|
|
bcc bbbb
|
|
beq bbbb
|
|
jmp done_draw_box_yloop ; bge
|
|
|
|
bbbb:
|
|
lda gr_offsets_l,Y
|
|
sta draw_box_xloop_smc+1
|
|
|
|
lda gr_offsets_h,Y
|
|
clc
|
|
adc DRAW_PAGE
|
|
sta draw_box_xloop_smc+2
|
|
|
|
lda COLOR
|
|
ldx X2
|
|
draw_box_xloop:
|
|
draw_box_xloop_smc:
|
|
sta $400,X
|
|
dex
|
|
cpx X1
|
|
bpl draw_box_xloop ; bge (signed)
|
|
|
|
iny
|
|
|
|
jmp draw_box_yloop
|
|
|
|
done_draw_box_yloop:
|
|
; done
|
|
|
|
; if Y2 was even we need to fixup and draw one more line
|
|
|
|
lda Y2
|
|
lsr
|
|
bcs definitely_odd_bottom
|
|
|
|
jsr hlin_mask_even
|
|
|
|
definitely_odd_bottom:
|
|
; done
|
|
|
|
rts
|
|
|
|
|
|
;=================================
|
|
;=================================
|
|
; draw hlin
|
|
;=================================
|
|
;=================================
|
|
draw_hlin:
|
|
|
|
lda (INL),Y
|
|
sta X1
|
|
iny
|
|
lda (INL),Y
|
|
sta X2
|
|
iny
|
|
lda (INL),Y
|
|
|
|
sta Y1 ; needed for HLIN_ADD
|
|
|
|
|
|
;===================================
|
|
;===================================
|
|
; hlin common code
|
|
;===================================
|
|
;===================================
|
|
; X1, X2 set up
|
|
; Y-coord is in A
|
|
; Y is A/2
|
|
|
|
hlin_common:
|
|
|
|
lsr
|
|
tay
|
|
bcc hlin_mask_even
|
|
|
|
hlin_mask_odd:
|
|
lda #$0F
|
|
.byte $2C ; bit trick
|
|
hlin_mask_even:
|
|
lda #$F0
|
|
sta MASK
|
|
eor #$FF
|
|
and COLOR
|
|
sta COLOR2
|
|
|
|
lda gr_offsets_l,Y
|
|
sta draw_hlin_l_xloop_smc+1
|
|
sta draw_hlin_s_xloop_smc+1
|
|
|
|
lda gr_offsets_h,Y
|
|
clc
|
|
adc DRAW_PAGE
|
|
sta draw_hlin_l_xloop_smc+2
|
|
sta draw_hlin_s_xloop_smc+2
|
|
|
|
ldx X2
|
|
draw_hlin_xloop:
|
|
draw_hlin_l_xloop_smc:
|
|
lda $400,X
|
|
and MASK
|
|
ora COLOR2
|
|
draw_hlin_s_xloop_smc:
|
|
sta $400,X
|
|
dex
|
|
cpx X1
|
|
bpl draw_hlin_xloop ; bge
|
|
done_hlin_xloop:
|
|
rts
|
|
|
|
|
|
|
|
;=================================
|
|
;=================================
|
|
; draw hlin add
|
|
;=================================
|
|
;=================================
|
|
; increment Y1
|
|
draw_hlin_add:
|
|
|
|
lda (INL),Y
|
|
sta X1
|
|
iny
|
|
|
|
draw_hlin_add_lsame:
|
|
lda (INL),Y
|
|
sta X2
|
|
|
|
hlin_inc_y1:
|
|
inc Y1
|
|
lda Y1
|
|
|
|
jmp hlin_common
|
|
|
|
|
|
;=================================
|
|
;=================================
|
|
; draw hlin add_lsame
|
|
;=================================
|
|
;=================================
|
|
; increment Y1
|
|
; use old left value
|
|
;draw_hlin_add_lsame:
|
|
|
|
; lda (INL),Y
|
|
; sta X2
|
|
|
|
; jmp hlin_inc_y1
|
|
|
|
|
|
;=================================
|
|
;=================================
|
|
; draw hlin add_rsame
|
|
;=================================
|
|
;=================================
|
|
; increment Y1
|
|
; use old right value
|
|
draw_hlin_add_rsame:
|
|
|
|
lda (INL),Y
|
|
sta X1
|
|
|
|
jmp hlin_inc_y1
|
|
|
|
|
|
;=================================
|
|
;=================================
|
|
; draw box add
|
|
;=================================
|
|
;=================================
|
|
; increment Y2, put into Y1
|
|
draw_box_add:
|
|
lda Y2
|
|
sta Y1
|
|
inc Y1
|
|
|
|
lda (INL),Y
|
|
sta X1
|
|
iny
|
|
|
|
jmp draw_box_common_x2
|
|
|
|
|
|
;=================================
|
|
;=================================
|
|
; draw box add_lsame
|
|
;=================================
|
|
;=================================
|
|
; increment Y2, store in Y1
|
|
; use old X1 value
|
|
draw_box_add_lsame:
|
|
|
|
lda Y2
|
|
sta Y1
|
|
inc Y1
|
|
|
|
jmp draw_box_common_x2
|
|
|
|
|
|
;=================================
|
|
;=================================
|
|
; draw box add_rsame
|
|
;=================================
|
|
;=================================
|
|
; increment Y2, put in Y1
|
|
; use old right value X2
|
|
draw_box_add_rsame:
|
|
|
|
lda Y2
|
|
sta Y1
|
|
inc Y1
|
|
|
|
lda (INL),Y
|
|
sta X1
|
|
|
|
jmp draw_box_common
|
|
|
|
|
|
;=================================
|
|
;=================================
|
|
; draw vlin add
|
|
;=================================
|
|
;=================================
|
|
draw_vlin_add:
|
|
inc X1 ; X1 is prev_X1+1
|
|
|
|
bne draw_vlin_skip_x1 ; bra
|
|
|
|
|
|
;=================================
|
|
;=================================
|
|
; draw vlin
|
|
;=================================
|
|
;=================================
|
|
draw_vlin:
|
|
lda (INL),Y
|
|
sta X1
|
|
iny
|
|
draw_vlin_skip_x1:
|
|
lda (INL),Y
|
|
sta Y1
|
|
iny
|
|
lda (INL),Y
|
|
sta Y2
|
|
|
|
;================================
|
|
draw_vlin_common:
|
|
lda Y2
|
|
lsr
|
|
; if even, go to one less
|
|
; else, fine
|
|
bcs odd_bottom_vlin
|
|
even_bottom_vlin:
|
|
sec
|
|
sbc #1
|
|
|
|
odd_bottom_vlin:
|
|
|
|
sta vlin_yend_smc+1
|
|
|
|
; handle top
|
|
; see if we start at multiple of two
|
|
|
|
lda Y1
|
|
lsr
|
|
tay ; needed! Sets Y for vlin_yloop
|
|
bcc even_vlin_start
|
|
|
|
odd_vlin_start:
|
|
; we're odd, need to call PLOT
|
|
lda Y1
|
|
jsr plot_common
|
|
|
|
iny ; update Y for vlin_yloop
|
|
|
|
|
|
even_vlin_start:
|
|
|
|
vlin_yloop:
|
|
vlin_yend_smc:
|
|
cpy #0
|
|
bcc cccc
|
|
beq cccc
|
|
jmp done_vlin_yloop ;
|
|
|
|
cccc:
|
|
|
|
lda gr_offsets_l,Y
|
|
sta vlin_xloop_smc+1
|
|
|
|
lda gr_offsets_h,Y
|
|
clc
|
|
adc DRAW_PAGE
|
|
sta vlin_xloop_smc+2
|
|
|
|
lda COLOR
|
|
ldx X1
|
|
|
|
vlin_xloop_smc:
|
|
sta $400,X
|
|
|
|
iny
|
|
|
|
jmp vlin_yloop
|
|
|
|
; done
|
|
done_vlin_yloop:
|
|
|
|
; if Y2 was even we need to fixup and draw one more line
|
|
|
|
lda Y2
|
|
lsr
|
|
bcs definitely_odd_vlin
|
|
|
|
lda Y2
|
|
jmp plot_common ; plot_mask_even (tail call)
|
|
|
|
definitely_odd_vlin:
|
|
; done
|
|
|
|
rts
|
|
|
|
|
|
|
|
|
|
;=================================
|
|
;=================================
|
|
; draw plot
|
|
;=================================
|
|
;=================================
|
|
draw_plot:
|
|
lda (INL),Y
|
|
sta X1
|
|
|
|
iny
|
|
lda (INL),Y
|
|
sta Y1 ; needed for HLIN_ADD
|
|
|
|
|
|
; fallthrough
|
|
|
|
|
|
;===================================
|
|
;===================================
|
|
; plot common code
|
|
;===================================
|
|
;===================================
|
|
; X-coord in X1
|
|
; Y-coord in A
|
|
; Y is Y-coord/2 at end
|
|
plot_common:
|
|
|
|
lsr ; need Y-coord/2 because 2 rows per byte
|
|
tay
|
|
bcc plot_mask_even
|
|
plot_mask_odd:
|
|
lda #$0F
|
|
.byte $2C ; bit trick
|
|
plot_mask_even:
|
|
lda #$F0
|
|
sta MASK
|
|
eor #$FF
|
|
and COLOR
|
|
sta COLOR2
|
|
|
|
lda gr_offsets_l,Y
|
|
sta plot_l_smc+1
|
|
sta plot_s_smc+1
|
|
|
|
lda gr_offsets_h,Y
|
|
clc
|
|
adc DRAW_PAGE
|
|
sta plot_l_smc+2
|
|
sta plot_s_smc+2
|
|
|
|
ldx X1
|
|
plot_l_smc:
|
|
lda $400,X
|
|
and MASK
|
|
ora COLOR2
|
|
plot_s_smc:
|
|
sta $400,X
|
|
|
|
rts
|
|
|
|
;===========================
|
|
; 16-bit increment of INL
|
|
; inline this?
|
|
inc_inl:
|
|
inc INL
|
|
bne done_inc_inl
|
|
inc INH
|
|
done_inc_inl:
|
|
rts
|
|
|
|
;.include "gr_fast_clear.s"
|
|
|
|
gr_offsets_l:
|
|
.byte <$400,<$480,<$500,<$580,<$600,<$680,<$700,<$780
|
|
.byte <$428,<$4a8,<$528,<$5a8,<$628,<$6a8,<$728,<$7a8
|
|
.byte <$450,<$4d0,<$550,<$5d0,<$650,<$6d0,<$750,<$7d0
|
|
|
|
gr_offsets_h:
|
|
.byte >$400,>$480,>$500,>$580,>$600,>$680,>$700,>$780
|
|
.byte >$428,>$4a8,>$528,>$5a8,>$628,>$6a8,>$728,>$7a8
|
|
.byte >$450,>$4d0,>$550,>$5d0,>$650,>$6d0,>$750,>$7d0
|
|
|
|
;0123456789012345678901234567890123456789
|
|
|