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Posted By

rudis
on 2012-02-24
15:50:01

interrupts

wonder that i can't type anytthing after starting a raster..

only with clock-irq and color changing i can type and load .. but with raster nothing




.setcpu "6502"
.org $1001-2
.word $1001

.word link
.word 2012	; zeilennummer
.byte $9e	; sys-token
.byte "4109"	; adresse
.byte $00	; zeilenende
link:
.byte $00,$00

		sei

		ldx #<myvbl
		stx $312
		ldx #>myvbl
		stx $313

		lda #<raster
		sta $314
		lda #>raster
		sta $315
		lda #$02
		sta $ff0a
		lda #$30	; oben
		sta $ff0b
		cli

		rts

freq:
.byte $00,$00
color:
.byte $00,$00
count:
.byte $00,$00

raster:
		lda $ff09
		sta $ff09
		lda $ff0b
		cmp #$50	; unten
		bcc rasterende
		lda #$30	; oben
		sta $ff0b
		inc $ff19
		jmp rastersik
rasterende:
		lda #$50	; unten
		sta $ff0b
		dec $ff19
rastersik:
		pla
		tay
		pla
		tax
		pla
		rti

myvbl:
		ldx freq
		inx
		stx freq
		cpx #25
		bne myvblexit
		ldx #0
		stx freq
		clc
		lda color
		adc #$10
		sta color
		sta $ff19
		ldx count
		inx
		stx count
		cpx #7
		bne myvblexit
		clc
		adc #$01
		sta color
		ldx #0
		stx count
myvblexit:
		jmp $ce42
		rti
		jsr $fff6

Posted By

gerliczer
on 2012-02-24
16:31:00

Re: interrupts

Why do you expect the KERNAL keyboard reading routine to run, when your code abruptly returns from the interrupt handler without giving back control to the KERNAL? After the label 'rastersik' I think you should jump to either $CE42 or to the original value of $0314/$0315.

Posted By

Csabo
on 2012-02-24
16:30:44

Re: interrupts

The raster is what takes care of the keyboard polling. You replaced with your own routine, so you effectively removed that. I think putting "JSR $DB11" into your own raster will solve it.

Posted By

rudis
on 2012-02-28
13:47:03

Re: interrupts

i see..
asm is little bit to complex for me at this time. i better try some practise in basic

edit 28.02.:
jmp doesn't work for me. break all the time.

edit 2:
jsr $db11 do the work :)

Posted By

gerliczer
on 2012-02-28
16:12:48

Re: interrupts

Well, I don't really know what you were doing, but I tried to check your code. I put the JMP $CE0E/$CE42 rigth after the 'rastersik' label. I don't know where you tried to put the jump but it must go there. This way it works and does not break at all. When jumping to $CE0E, the keyboard reading not happens because the interrupt occurs too early (check the KERNAL code please, it is a good idea anyway to study it at least a little bit) but your custom interrupt works OK. When jumping to $CE42, the keyboard reading occurs but your custom interrupt goes horribly wrong. This happens because the KERNAL interrupt handler overrides your raster interrupt setting ($FF0A/$FF0B). Calling the keyboard polling at $DB11 of course will work anytime.

Posted By

rudis
on 2012-04-16
12:21:12

Re: interrupts

Heureka

managed to write a raster


.setcpu "6502"
.org $1001-2
.word $1001

.word link
.word 2012	; zeilennummer
.byte $9e	; sys-token
.byte "4109"	; adresse
.byte $00	; zeilenende
link:
.byte $00,$00

		sei
		lda #		sta $314
		lda #>raster
		sta $315
		lda #$02
		sta $ff0a
		lda #0	; oben
		sta $ff0b
		lda #11
		sta 65286		
		cli
		rts

raster:
		lda $ff09
		sta $ff09
		lda $ff0b
		cmp #0	; unten
		bcc rasterende

		ldx #98
loop:
		lda colors,x
spalte:
		ldy $ff1e
		cpy #176
		bmi spalte
		sta $ff19
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		dex
		bpl loop
		jmp rastersik
rasterende:
		lda #0	; unten
		sta $ff0b
rastersik:
		;jmp $fcbe
		pla
		tay
		pla
		tax
		pla
		rti

colors:
	 .byte 0
	 .byte 6,6,6,6,6,6
 	 .byte 22,22,22,22,22,22
	 .byte 38,38,38,38,38,38
         .byte 54,54,54,54,54,54
         .byte 70,70,70,70,70,70
         .byte 86,86,86,86,86,86
         .byte 102,102,102,102,102,102
         .byte 118,118,118,118,118,118
	 .byte 118,118,118,118,118,118
         .byte 102,102,102,102,102,102
         .byte 86,86,86,86,86,86
         .byte 70,70,70,70,70,70
         .byte 54,54,54,54,54,54
	 .byte 38,38,38,38,38,38
 	 .byte 22,22,22,22,22,22
	 .byte 6,6,6,6,6,6
         .byte 0,0,0

Posted By

Csabo
on 2012-04-16
15:10:26

Re: interrupts

Good for you! I can't remember if I mentioned this, but Plus4IDE comes with some examples, one of which has a rasterbar and soft-scroll implemented. The samples have detailed comments and explanations.

Posted By

Luca
on 2012-04-16
15:45:39

Re: interrupts

Posted By

rudis
on 2012-04-17
05:39:32

Re: interrupts

http://youtu.be/ly9bLhp40Fc

made it moving..

Posted By

rudis
on 2012-04-18
07:52:09

Re: interrupts

How to do Timer-interrupts?

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