Indeed. I have a horrible feeling that the Rev 0 might not allow the 020 to be disabled.
TF330 Akiko Rev 0 Issue (SOLVED)
Moderators: terriblefire, Terriblefire Moderator
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Re: TF330 possible issue?
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Re: TF330 possible issue?
What about the Akiko mirror addresses...?
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Re: TF330 possible issue?
I dont follow.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Re: TF330 possible issue?
Is the same Akiko identifier present at B80040, B80080...B87FC0?
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Re: TF330 possible issue?
I suppose its worth checking but i would be incredibly surprised if the 64 byte mirrors had different data. Usually with these things its because they cheaped out on the address decoding.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Re: TF330 possible issue?
Another address that may be worth checking between revisions are bits 0 to 22 of Config/B80024.
Re: TF330 possible issue?
My gut feeling is that 020 does get disabled, but then something else in the logic is different. The behaviour is consistent, yellow screen, flashing led, black screen, flashing led, yellow screen. If both CPUs were on, I don't think we would be seeing this.
I don't know anyone else with the SX32 AND a rev 0 Akiko... but surely this would have popped up sooner if that had been the case.
I don't know anyone else with the SX32 AND a rev 0 Akiko... but surely this would have popped up sooner if that had been the case.
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Re: TF330 possible issue?
My thought process...alenppc wrote: ↑Wed Mar 13, 2019 11:39 pm My gut feeling is that 020 does get disabled, but then something else in the logic is different. The behaviour is consistent, yellow screen, flashing led, black screen, flashing led, yellow screen. If both CPUs were on, I don't think we would be seeing this.
I don't know anyone else with the SX32 AND a rev 0 Akiko... but surely this would have popped up sooner if that had been the case.
There are 3 ways the TF330 interacts with Akiko..
(i) It holds CPU_BR low for all time.
(ii) It uses EX_BR/EX_BG for bus arb in place of CPU_BR/CPU_BG.
(iii) it expects PUNT to disable all the decodes on the mobo.
The only other weirdness might be the FPU detection code in the OS. Since people are reporting DiagROM going mad when accessing Fastram i cant see how any of this relates to Akikio. Unless PUNT is non-functional somehow or the 020 is still running.
When the TF330 accesses Fastram it simply tells the Amiga to shut up.
I'm very confused at this point.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Re: TF330 possible issue?
It would be helpful if there was any documentation about the differences between the rev 0 and rev A, but I can't seem to find anything.
- 8 Bit Dreams
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Re: TF330 possible issue?
Nope, 020 CPU is cold as women's feets, there must be something elseterriblefire wrote: ↑Wed Mar 13, 2019 10:27 pm
Indeed. I have a horrible feeling that the Rev 0 might not allow the 020 to be disabled.
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