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https://github.com/deater/dos33fsprogs.git
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134 lines
2.2 KiB
ArmAsm
134 lines
2.2 KiB
ArmAsm
; Tiny Tiny
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; zero page locations
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HGR_SHAPE = $1A
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HGR_SHAPE2 = $1B
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HGR_BITS = $1C
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GBASL = $26
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GBASH = $27
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A5H = $45
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XREG = $46
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YREG = $47
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; C0-CF should be clear
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; D0-DF?? D0-D5 = HGR scratch?
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HGR_DX = $D0 ; HGLIN
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HGR_DX2 = $D1 ; HGLIN
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HGR_DY = $D2 ; HGLIN
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HGR_QUADRANT = $D3
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HGR_E = $D4
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HGR_E2 = $D5
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HGR_X = $E0
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HGR_X2 = $E1
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HGR_Y = $E2
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HGR_COLOR = $E4
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HGR_HORIZ = $E5
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HGR_SCALE = $E7
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HGR_SHAPE_TABLE = $E8
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HGR_SHAPE_TABLE2= $E9
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HGR_COLLISIONS = $EA
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HGR_ROTATION = $F9
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FRAME = $FC
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XPOS = $FD
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YPOS = $FF
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; ROM calls
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HGR2 = $F3D8
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HGR = $F3E2
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HPOSN = $F411
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XDRAW0 = $F65D
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XDRAW1 = $F661
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RESTORE = $FF3F
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.zeropage
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.globalzp rot_smc
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tiny_tiny:
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jsr HGR2 ; Hi-res, full screen ; 3
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; Y=0, A=0 after this call
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; lda #$10
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; stx HGR_SCALE ; loading so JSR ($20) is at scale ($E7)
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; ldy #0 ; Y already 0
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; ldx #140
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; lda #96
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txa
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jsr HPOSN ; X= (y,x) Y=(a)
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; sta GBASL
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; sta GBASH
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; lda #40
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; sta HGR_SCALE
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; lda #$46
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; sta GBASH
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; lda #$A8
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; sta GBASL
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; setup X and Y co-ords
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; ldy #0 ; Y always 0
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; ldx #140
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; lda #96
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; jsr HPOSN ; X= (y,x) Y=(a)
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; saves Y/X/A to HGR_Y, HGR_X, HGR_X+1
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; after, Y = X/7
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; after, y = $14 = 20, always
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; A=FF, X=F9
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; GBASL = 46A8
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tiny_loop:
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inc rot_smc+1
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ldx #<shape_table ; point to our shape
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shape_table:
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ldy #0
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rot_smc:
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lda #0 ; ROT=0
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jsr XDRAW0 ; XDRAW 1 AT X,Y
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; Both A and X are 0 at exit
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; Z flag set on exit
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; Y varies
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beq tiny_loop ; bra
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;shape_table:
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; .byte $A8,0 ; shape data
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; 22 00 = $D
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; 30 would work
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; NUP=0 UP=4
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; NRT=1 RT=5
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; NDN=2 DN=6
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; NLT=3 LT=7
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; INVALID 00 000 000 = 00
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; NRT NUP 00 000 001 = 01
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; NDN NUP 00 000 010 = 02
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; NLT NUP 00 000 011 = 03
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; UP NUP 00 000 100 = 04
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; LT NUP 00 000 111 = 07
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; NDN NRT 00 001 010 = 0A
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; RT NRT 00 001 101 = 0D
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; NUP NLT 00 011 000 = 18
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; LT NLT 00 011 111 = 1F
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; NUP UP 00 100 000 = 20
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; UP NDN 00 100 010 = 22 ****
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; NUP RT 00 101 000 = 28
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; UP RT 00 101 100 = 2C
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; RT RT is 00 101 101 = 2D
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; LT RT is 00 101 111 = 2F ****
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; NUP DN 00 110 000 = 30 ****
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; DN DN 00 110 110 = 36
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; NUP LT 00 111 000 = 38
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; is 10 100 000 = UP NUP
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