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demos: more putting things back

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This commit is contained in:
Vince Weaver 2022-02-03 01:28:16 -05:00
parent a1beb7b2f2
commit 1e7a64719d
3 changed files with 33 additions and 57 deletions
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2
graphics/hgr/circles/horror.s
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@ -175,5 +175,5 @@ done:
jsr HCOLOR1 ; use as color
; cpx #48 ; run until R=48
bne draw_next ; loop (GOTO 1)
jmp draw_next ; loop (GOTO 1)

2
graphics/hgr/circles/orb_tiny.s
View File

@ -191,7 +191,7 @@ done:
jsr HCOLOR1 ; use as color
; cpx #48 ; run until R=48
bne draw_next ; loop (GOTO 1)
jmp draw_next ; loop (GOTO 1)

86
graphics/hgr/wires/staggered.s
View File

@ -1,82 +1,58 @@
; wires -- Apple II Hires
; shimmery blue pattern
INDEXL = $F6
INDEXH = $F7
HGR2 = $F3D8 ; set hires page2 and clear $4000-$5fff
WAIT = $FCA8 ; delay 1/2(26+27A+5A^2) us
; D0+ used by HGR routines
HGR_COLOR = $E4
HGR_PAGE = $E6
staggered:
jsr HGR2 ; after, A=0, Y=0
GBASL = $26
GBASH = $27
COUNT = $FE
FRAME = $FF
; soft-switches
; ROM routines
HGR2 = $F3D8 ; set hires page2 and clear $4000-$5fff
HGR = $F3E2 ; set hires page1 and clear $2000-$3fff
HPLOT0 = $F457 ; plot at (Y,X), (A)
HCOLOR1 = $F6F0 ; set HGR_COLOR to value in X
COLORTBL = $F6F6
PLOT = $F800 ; PLOT AT Y,A (A colors output, Y preserved)
NEXTCOL = $F85F ; COLOR=COLOR+3
SETCOL = $F864 ; COLOR=A
SETGR = $FB40 ; set graphics and clear LO-RES screen
BELL2 = $FBE4
WAIT = $FCA8 ; delay 1/2(26+27A+5A^2) us
wires:
jsr HGR2
tax ; init X to 0
stx INDEXL ; set INDEXL to 0
; pulse loop horizontal
lda #$00
tay
tax
sta GBASL
outer_loop:
lda #$40
sta GBASH
lda #$40 ; reset INDEXH to begin page2
sta INDEXH
inner_loop:
lda even_lookup,X
sta (GBASL),Y
lda even_lookup,X ; get even color
sta (INDEXL),Y ; store it to memory
iny
lda odd_lookup,X
sta (GBASL),Y
lda odd_lookup,X ; get odd color
sta (INDEXL),Y ; store it to memory
iny
bne inner_loop
inc GBASH
bne inner_loop ; repeat for 256
inx
txa
inc INDEXH ; point to next page
inx ; point to next lookup
txa ; wrap to 0..7
and #$7
tax
lda #$60
cmp GBASH
lda #$60 ; see if done
cmp INDEXH
bne inner_loop
; lda #100
jsr WAIT
; lda #100 ; A is $60 here
jsr WAIT ; pause a bit
inx
; A is 0 here
inx ; offset next FRAME
jmp outer_loop
even_lookup:
.byte $D7,$DD,$F5,$D5, $D5,$D5,$D5,$D5
odd_lookup:
.byte $AA,$AA,$AA,$AB, $AB,$AE,$BA,$EA