PAK 68/3 in STE

[exxos]

My PAK (FPU fitted) was rock stable at 40 Mhz in my Mega ST, and there was no need for a PUPLA either.

Isn't PUPLA some sort of weird bus buffer board ?

[HigashiJun]

My PAK (FPU fitted) was rock stable at 40 Mhz in my Mega ST, and there was no need for a PUPLA either.

Isn't PUPLA some sort of weird bus buffer board ?

Yes, it is supposed to help with stability issues.

I will try with the PUSTE, specially made for the STE series, to see what happens.

[Badwolf]

I think after all the troubles @Badwolf had with the FPU, I don't think it is worth all the hassle.

Plus these days we have a very effective soft-FPU, thanks to Anders:

https://github.com/agranlund/tftools/bl ... /fpemu.prg



BW

[exxos]

https://github.com/agranlund/tftools/bl ... /fpemu.prg

Did that ever get finished for official release ? It should be put in the software essentials section as it would be useful to keep it handy there.

[HigashiJun]

I think after all the troubles @Badwolf had with the FPU, I don't think it is worth all the hassle.

Plus these days we have a very effective soft-FPU, thanks to Anders:

https://github.com/agranlund/tftools/bl ... /fpemu.prg



BW

Good to know that.

[HigashiJun]

Tried yesterday my PAK68 with its original PUSTE only to discover a white screen at boot-up...

No doubts here about the culprit: the Winslow socket pins are not making contact with the CPU socket when inserted.

Winslow.JPG (231.04 KiB) Viewed 1624 times

If you look carefully, you will notice that the pins are bent inwards.

As i didn't want to tinker with the PUSTE anymore, I decided to build exxos' DIP adapter (as two sets were biding their time in my spare parts box) and compare its behaviour with Badwolf's one.

The result is:

TOS306.JPG (456.97 KiB) Viewed 1624 times

PAK68.JPG (382.58 KiB) Viewed 1624 times

No more memory errors nor freezes or reboots at startup.

Ultrasatan and FDD doesn't work though, but I didn't tried with PUPLA/2 yet.

I didn't revert to original SILs and still use exxos' recommended values.

Have to investigate a bit further to see if there's a way to make Badwolf's adapter work with my PAK.

[Darklord]

Excellent progress.

[HigashiJun]

Tried the last setup with the PUPLA/2 and had issues as previously (memory errors and freezes) and there was no way to get to the desktop.

Guess there's too much buffers in now: exxos' adapter buffers and PUPLA/2 buffers.

[HigashiJun]

Excellent progress.

Thanks !

[TheNameOfTheGame]

Nice work!