mirror of
https://github.com/deater/dos33fsprogs.git
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77 lines
1.4 KiB
ArmAsm
77 lines
1.4 KiB
ArmAsm
; combo -- Apple II Hires
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; 280 bytes -- initial combo
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; 276 bytes -- shave some bytes
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; 275 bytes -- common HLINRL function (thought it would save more)
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; 271 bytes -- optimize circle draw code
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; 268 bytes -- circle code now <128 so use bne instead of jmp
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; zero page
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GBASL = $26
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GBASH = $27
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; D0+ used by HGR routines
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HGR_COLOR = $E4
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HGR_PAGE = $E6
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COUNT = $F6
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XX = $F7
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MINUSXX = $F8
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YY = $F9
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MINUSYY = $FA
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D = $FB
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R = $FC
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DADD = $FD
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FRAME = $FF
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; soft-switches
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KEYPRESS = $C000
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KEYRESET = $C010
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; ROM routines
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HGR2 = $F3D8 ; set hires page2 and clear $4000-$5fff
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HGR = $F3E2 ; set hires page1 and clear $2000-$3fff
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HPOSN = $F411
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HPLOT0 = $F457 ; plot at (Y,X), (A)
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HLINRL = $F530 ; line to (X,A), (Y)
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HCOLOR1 = $F6F0 ; set HGR_COLOR to value in X
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COLORTBL = $F6F6
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PLOT = $F800 ; PLOT AT Y,A (A colors output, Y preserved)
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NEXTCOL = $F85F ; COLOR=COLOR+3
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SETCOL = $F864 ; COLOR=A
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SETGR = $FB40 ; set graphics and clear LO-RES screen
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BELL2 = $FBE4
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WAIT = $FCA8 ; delay 1/2(26+27A+5A^2) us
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combo:
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lda #$20
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sta FRAME
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jsr HGR2 ; after, A=0, Y=0
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.include "orb.s"
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.include "staggered.s"
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.include "boxes.s"
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; sadly this only saves a byte
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combo_hlinrl:
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ldy #0
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ldx #0
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jmp HLINRL ; plot relative (X,A), (Y)
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even_lookup:
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.byte $D7,$DD,$F5,$D5, $D5,$D5,$D5,$D5
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odd_lookup:
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.byte $AA,$AA,$AA,$AB, $AB,$AE,$BA,$EA
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