Apple-2-SW/dos33fsprogs
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hgr: oval bot

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This commit is contained in:
Vince Weaver 2021-10-25 17:13:29 -04:00
parent 0527513905
commit d491f6ddca
2 changed files with 11 additions and 15 deletions
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4
graphics/hgr/plasma/Makefile
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@ -15,7 +15,7 @@ plasma_hgr.dsk: HELLO OVAL PURPLE_WAVES ZEBRA JAWS TWIST OVAL_BOT
$(DOS33) -y plasma_hgr.dsk BSAVE -a 0xc00 ZEBRA
$(DOS33) -y plasma_hgr.dsk BSAVE -a 0xc00 JAWS
$(DOS33) -y plasma_hgr.dsk BSAVE -a 0xc00 TWIST
$(DOS33) -y plasma_hgr.dsk BSAVE -a 0x378 OVAL_BOT
$(DOS33) -y plasma_hgr.dsk BSAVE -a 0x3F5 OVAL_BOT
###
@ -33,7 +33,7 @@ oval.o: oval.s
###
OVAL_BOT: oval_bot.o
ld65 -o OVAL_BOT oval_bot.o -C $(LINKERSCRIPTS)/apple2_378.inc
ld65 -o OVAL_BOT oval_bot.o -C $(LINKERSCRIPTS)/apple2_3f5.inc
oval_bot.o: oval_bot.s
ca65 -o oval_bot.o oval_bot.s -l oval_bot.lst

22
graphics/hgr/plasma/oval_bot.s
View File

@ -86,12 +86,10 @@ draw_oval:
inc FRAME
lda #191 ; YY
; sta HGR_Y
create_yloop:
; dec HGR_Y
; HGR_Y (YY) is in A here
; lda HGR_Y
; ldx #39 ; X is don't care?
ldy #0
@ -99,8 +97,6 @@ create_yloop:
; restore values
ldy #39 ; XX
lda HGR_Y ; YY
calcsine_div2:
@ -113,7 +109,7 @@ calcsine_div2:
ldx HGR_Y ; YY
ldy #39 ; XX
create_xloop:
;=====================
@ -147,6 +143,7 @@ ror_nop_smc:
dec HGR_Y
lda HGR_Y
cmp #$ff
bne create_yloop
; we skip drawing line 0 as it makes it easier
@ -155,13 +152,13 @@ flip_pages:
; Y should be $FF here
iny
; iny
lda HGR_PAGE
cmp #$20
beq done_page
iny
bne done_page
dey
done_page:
ldx PAGE1,Y ; set display page to PAGE1 or PAGE2
ldx PAGE1-$FE,Y ; set display page to PAGE1 or PAGE2
eor #$60 ; flip draw page between $400/$800
sta HGR_PAGE
@ -185,9 +182,8 @@ sinetable_base:
; for bot
; 3F5 - 7d = 378
jmp oval
; jmp oval
sinetable=$6000
gbasl = $6100
gbash = $6200