10 replies to this topic

[_Fandal_]

Hi all!

I need your help Atarians!! I'm looking for owners of stereo upgrade to test Raster's stereo detection routine on real HW. We know there's a lot of various stereo upgrades out there and we need to know if we're able to detect them all (or at least most of them). In the attachment you can find Raster's detection program. Please run it and let us know if your stereo upgrade was successfully found or not.

Thank you very much for your help!

F.

Attached Files

•  STEREOTS.zip   3.84K   88 downloads

Edited by _Fandal_, Tue Jun 20, 2006 12:18 AM.

[Rybags]

What method does it use?

Wouldn't just triggering a Timer event on the resident POKEY be enough - then just compare the conents of the two IRQST registers?

[classics]

This did not detect my stereo Pokey cartridge. You should probably look for Pokeys in d5xx as well.

Steve

Edited by classics, Tue Jun 20, 2006 1:48 AM.

[raster/c.p.u.]

Rybags, on Tue Jun 20, 2006 7:57 AM, said:

What method does it use?

pokey1 equ $d200
pokey2 equ $d210

STEREODETECTION
   lda pokey1+$09
   beq iss2  ;0 => last key L
;no last key L
   lda pokey2+$09
   beq issyes;0 on second POKEY KEY reg => stereo
issno
   lda #0
   rts
iss2
   ldy #7
iss3
   lda pokey2,y;POT regs
   bne issno   ;some one is not zero
   dey
   bpl iss3
issyes
   lda #1
   rts

Quote

You should probably look for Pokeys in d5xx as well.

There in d5xx area can be any cartridge hardware. I don't know if any "normal" program (game or demo, not music player sw or system tool) supports stereo at d5xx...
(Also it could evoke whatever when you will read/write to d5xx area, depend on inserted cartridge.)

[Beetle]

Hi

i tested the program on my stereo 800XL. My "Gumby" upgrade is
selfmade with the second pokey on top of the original one.

Your program detected the upgrade correctly. Nice sample

Greets,
Beetle

[Rybags]

If you find your routine doesn't work, maybe try timers?

SEI
LDA #0
STA $D21E; disable all IRQs on POKEY #2
STA $D208; AUDCTL
LDA #1
STA $D20E; enable only Timer 1 on POKEY #1
STA $D200; hi freq. interrupt
STA $D209; start timer
WAIT BIT $D20E
BNE WAIT; timer event doesn't take long with AUDF=1
BIT $D21E
BNE YES_POKEY2; IRQ event should not be on POKEY #2 as well
LDA #0
YES_POKEY2 STA POKEY2_FLAG
LDA $10
STA $D20E
CLI
...

[MEtalGuy66]

YEah. It detects the board I made & sold..

DUAL POkey Upgrade board thread

No problem..

[twh/f2]

yes I can confirm this to work.... mhm .. maybe because my stereo upgrade has been installed by members of C.P.U. at the Noise party in Slovakia )

\twh

[_Fandal_]

Thank you guys for your help and especialy you Rybags. Your detection routine seems to be very universal for various stereo upgrades...

F.

[Rybags]

An additional comment.

You should store 3 in SKCTL (offset $0F).

In the case that bits 1,0 of the Serial Port control are 00, most (all?) of POKEYs function is disabled.

[_Fandal_]

Rybags, on Wed Jun 21, 2006 5:22 AM, said:

An additional comment.

You should store 3 in SKCTL (offset $0F).

In the case that bits 1,0 of the Serial Port control are 00, most (all?) of POKEYs function is disabled.

OK. I'll add it to the code. Thank you for advice.

F.