TF536 IDE speed
Moderators: terriblefire, Terriblefire Moderator
Re: TF536 IDE speed
Here are photos of my processors under a microscope you can not see the remains of the previous name, but you can see a very similarity pay attention to the number six and two dots of paint on it are identical to all three cpu
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Re: TF536 IDE speed
The A500 is a very strange beast. For example the 536 will boot at 40 MHz (80 crystal) but only on a rev5 motherboard. On rev 6 and up it just gives a yellow/red screen at boot.terriblefire wrote: ↑Wed Jul 01, 2020 9:51 pm Im a bit confused about the 330 vs 536 thing...
Mostly because not only is it the same verilog code in both boards but 66% of the traces are identical. Its a literal copy and paste job.
Strange.
I know it wasn’t intended to work at 40 but I wanted to try anyway since there are no issues on the CD32.
Plus, doesn’t it have to slow down to 7 MHz vs 14 when accessing the motherboard? That may have something to do with it. Maybe some CPUs don’t like running at 7.
Re: TF536 IDE speed
Power supplies are different between CD32 and wedges. I know it’s a different design and may be unrelated, but most had problems getting stable 50mhz even on TF534.terriblefire wrote: ↑Wed Jul 01, 2020 9:51 pm Im a bit confused about the 330 vs 536 thing...
Mostly because not only is it the same verilog code in both boards but 66% of the traces are identical. Its a literal copy and paste job.
Strange.
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Re: TF536 IDE speed
For some reason my post wasn't posted, I asked the same thing.
I would love to see the CPU voltage and see the ripple on a scope for both the CD32/330 and an A500/536 .
Re: TF536 IDE speed
I am using a A500 psu on my TF360 CD32.
I just added a CD32 cable to the existing AMIGA one (i don't power a wedge & CD32 at the same time off it).
I did recap the psu and replace a couple of resistors which always show heat damage.
I just added a CD32 cable to the existing AMIGA one (i don't power a wedge & CD32 at the same time off it).
I did recap the psu and replace a couple of resistors which always show heat damage.
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Re: TF536 IDE speed
The CPUs shouldnt be unhappy with 7 but the clock signal rise time on the A500 is like a fortnight. I didnt add the buffer chip from the 534 because i didnt want more clock delays and figured with my approach i'd never get metastability...alenppc wrote: ↑Thu Jul 02, 2020 1:04 am The A500 is a very strange beast. For example the 536 will boot at 40 MHz (80 crystal) but only on a rev5 motherboard. On rev 6 and up it just gives a yellow/red screen at boot.
I know it wasn’t intended to work at 40 but I wanted to try anyway since there are no issues on the CD32.
Plus, doesn’t it have to slow down to 7 MHz vs 14 when accessing the motherboard? That may have something to do with it. Maybe some CPUs don’t like running at 7.
You will probably need a phase adjustment for 40Mhz on a 500. I'll maybe come back to this after I get the these 060 bugs sorted.
———
"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."
- arkadiusz.makarenko
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Re: TF536 IDE speed
Do you think it would be worth trying 90mhz oscillator with the set up as it is? Or this definitely would not work?
Do not trust people. They are capable of greatness.
~ Stanislaw Lem
~ Stanislaw Lem
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Re: TF536 IDE speed
I have some fake cpu's from time when i was overclocking ACA 1233 on A1200. I have 4 of them and 2 orginal 40Mhz.
Some of them are running at 49Mhz and rest is crashing over 45mhz.
I have not test them on TF536 yet, but if yours will run with 98mhz oscillator, than its not a big diffrence to 100mhz
Btw. I soldered one of my TF536 and it runs fine at 108Mhz (CPU-54Mhz)
Some of them are running at 49Mhz and rest is crashing over 45mhz.
I have not test them on TF536 yet, but if yours will run with 98mhz oscillator, than its not a big diffrence to 100mhz
Btw. I soldered one of my TF536 and it runs fine at 108Mhz (CPU-54Mhz)
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Re: TF536 IDE speed
This is getting off topic guys. Start (yet another) new thread about fake CPUs.
———
"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."