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Just looking for a pcb, not working of course (it’s too easy otherwise ;-))

I don’t have an accelerator; it’d probably cost more than a whole IIfx anyway. My total budget is about $50.

Hi, Sorry for the late reply, I ended up going with an ATX conversion.

I know, sadly… I’m also looking for a IIfx board. I already have one, but it’s completely destroyed by a leaky Maxwell battery. I’d like to make a recreation board, but a couple of ICs are too far gone.

Hi everyone, I’m looking for a Motorola MC68851 PMMU chip to upgrade my Macintosh II. The machine currently runs with a 68020 and I’d like to enable full virtual memory support, ideally to run A/UX or other OSes requiring a PMMU. If you have a working MC68851 (preferably tested or NOS), or a...

By the way, if UF8 (LS393) is defective, you'll get a black screen no matter what.

I'm getting something !! I don't exactly understand how it works for now, don't really now what to test. It still doesn't work on pc with the null modem cable xD

Really ? I'll be able to communicate with it ? I thought it wasn't possible. Which software should I use ?

Thanks! I bought that one :

Found that I tried to use the “hidden test mode”, but I cannot type anything on the terminal. I was using Tera Term with the good settings (9600 baud, 8 bits, 2 bits stop, no flux). Same thing on a working machine in crash state, so my mini din-8 to serial cable might be bad. Apparently some...

Unfortunately, no. The ultrasonic baths didn't change a lot. This morning I checked almost every traces around the battery, the copro and the muxes, they're all fine ! Even the vias !

Okay !!! Sorry, I feel a bit stupid right now. But at least they're correctly in place. The Mini-din 8 to serial cable is coming home...

I swear, there’s nothing on the new F258AD from Philips ! I looked under the microscope !

I used F258AD, not F258. They’re from Philips.

There’s no marking or anything on the chips, even under the microscope.

I checked all the vias underneath the battery — they're all good. But I'm not entirely sure the new F258s are installed the right way, since there were no markings on them.

I ordered a Din-8 to Serial cable, to see if I can get an error code.

Isn’t that concerning ?

I'll check that with the microscope, thanks !

I figured out it's a problem with the RAM. Zebra pattern is normal, it's because I have TI chips at UC6 and UC7.