flaky Apollo 1230-40MHz

[Agafaster]

I've got this Apollo 1230 board thats a bit flaky - bought it about 6 years ago to replace the Apollo1230 Litethat served me so well for the previous 3 years, but its never been right - crashes the machine a lot. I've tried cleaning contacts, etc but I'm stumped. I'd kinda like to get it going so I can run AGA demos, etc on a classic.

does anyone know of anyone who still fixes these things ?

[Agafaster]

I havent tried it in a long time, to be honest !
I had two 16MB simms I bought off a mate.
I did however have similar problems with the 8MB stick I was using in the 1230Lite, and the 4MB stick I got with the Lite. (it was the 4MB and a Lite for £100 from Power way back in the era when God's dog was a pup !)

not sure. think I'll have to have a play - but it might be flakey even without RAM ! could be a loose edge conn though - I even got some trichloroethane spray to clean the contacts, etc !

not sure if it was ever really stable - could be heat issue - I guess the 1st thing to do (after giving it a go!) could be to downgrade the clock to the CPU's rated speed.

[Agafaster]

now you come to mention it, mine hasnt got a heatsink.
its rated as 33MHz, IIRC though.

I'll have a play tonight, if I get chance.

[Agafaster]

humppa wrote:

It was revision 1D4 (the most common one) which was most affected by timing problems.
However, you can't bet on that. My 1D4 has been running perfectly so far with all accelerators I plugged in.

y'know - I think it (they) is (are. I have two - one is original CBM and flaky anyway*, the other is Amiga Technologies era) I need to confirm that, however, as I type this on a Compaq NT box! :boohoo:

the edgeconnector pins idea sounds good: I'll have a butchers' tonight.

I dont think the shielding is the problem: I tried it in its 1200T configuration: still flaky.




*I nuked the thing with a cdrom and 3.5" HDD without using a buffer board