The problem is probably due to the fact that it's almost 5 o'clock in the
morning right now but for some reason I can't get my freaking
source code to compile with DASM.
I used the command
dasm exp1.asm -oexp1.bin -f3
What it tells me is "error: source is not resolvable"
So what have I done wrong?
Anyways, I'm hoping that when I can figure out what the heck is keeping
the code from compiling, it will run alright and draw me a picture on the
screen using playfield graphics that are 8 lines high.
I studied Nick Bensema's "How To Draw A Playfield" code and used it as
a guide. Any ideas, comments, or questions?
Here's the code...
-----------------------------------------------------------------------------
processor 6502
VSYNC = $00
VBLANK = $01
WSYNC = $02
COLUPF = $08
COLUBK = $09
CTRLPF = $0A
PF0 = $0D
PF1 = $0E
PF2 = $0F
CXCLR = $2C
INTIM = $284
TIM64T = $296
org $f000
start SEI
CLD
LDX #$FF
TXS
LDA #$00
zero STA $00,X
DEX
BNE zero
main JSR vertb
JSR scrnvar
JSR draw
JSR oscan
JMP main
scrnvar LDA #$00
STA COLUPF
LDA #$4F
STA COLUBK
LDA #$02
STA CTRLPF
RTS
vertb LDX #$00
LDA #$02
STA WSYNC
STA WSYNC
STA WSYNC
STA WSYNC
STA WSYNC
STA WSYNC
LDA #$2C
STA TIM64T
LDA #$00
STA CXCLR
STA WSYNC
STA WSYNC
RTS
draw LDA INTIM
BNE draw
STA WSYNC
STA VBLANK
LDY #$08
LDX #$13
load LDA playf0,X
STA PF0
LDA playf1,X
STA PF1
LDA playf2,X
STA PF2
grfx STA WSYNC
DEY
BEQ block
JMP grfx
block LDA X
BEQ clear
DEX
LDY #$08
JMP load
clear LDA #$02
STA WSYNC
STA VBLANK
LDX PF0
LDX PF1
LDX PF2
RTS
oscan LDX #$1E
waste STA WSYNC
DEX
BNE waste
RTS
org $FFC0
playf0 .byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $20
.byte $20
.byte $70
.byte $f0
.byte $f0
.byte $f0
.byte $e0
.byte $e0
.byte $c0
.byte $80
.byte $00
.byte $00
.byte $00
playf1 .byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $00
.byte $10
.byte $10
.byte $11
.byte $3b
.byte $7b
.byte $ff
.byte $ff
.byte $ff
.byte $ff
.byte $ff
.byte $ff
.byte $ff
.byte $7c
.byte $30
playf2 .byte $00
.byte $00
.byte $80
.byte $80
.byte $c0
.byte $c0
.byte $c0
.byte $e2
.byte $e2
.byte $f2
.byte $fa
.byte $ff
.byte $1f
.byte $5f
.byte $5f
.byte $9f
.byte $df
.byte $cd
.byte $af
.byte $93
.byte $71
.byte $38
.byte $0c
.byte $04
org $FFFC
.word start
.word start
-----------------------------------------------------------------------------
So can anyone figure out why the damn thing won't compile?
I'm going to bed now... nighty night.
CRACKERS
(Disappointed from hell!!!)
--
Accordionist - Wethifl Musician - Atari 2600 Collector | /\/\
http://www.freenet.hamilton.on.ca/~ad329/Profile.html | \^^/
Bira Bira Devotee - FES Member - Samurai Pizza Cats Fan| =\/=
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