The big 4700 one? Could the ASCI socket be bad?Steve wrote: Tue Sep 01, 2020 4:16 pm To be honest I haven't had a reason to check the megafile yet, as the ST itself has issues. I'll check out that capacitor.
I'm not going to look at the ASCI till the floppy issue is solved, by capacitor I meant c68 you were talking about.AtariFox wrote: Tue Sep 01, 2020 4:17 pmThe big 4700 one? Could the ASCI socket be bad?Steve wrote: Tue Sep 01, 2020 4:16 pm To be honest I haven't had a reason to check the megafile yet, as the ST itself has issues. I'll check out that capacitor.
Also a little history of the machine, is that it was used constantly for many years by a DJ/midi music maker.
Alright, thank you. Sorry for all the questions. I'm still quite new to Atari side of things especially the diagnosing and way things work. I'm more Commodore 64.Steve wrote: Tue Sep 01, 2020 5:51 pmI'm not going to look at the ASCI till the floppy issue is solved, by capacitor I meant c68 you were talking about.AtariFox wrote: Tue Sep 01, 2020 4:17 pm
The big 4700 one? Could the ASCI socket be bad?
Also a little history of the machine, is that it was used constantly for many years by a DJ/midi music maker.
One small anomaly I just noticed is this: On the STFM KIT DUAL TOS kit that is installed (with ube chip) The ube has not been connected to pin 16 of CPU, the bank select jumper is on bk2, but TS is bridged! Which according to your instructions, could mean the ube chip is damaged. I know this probably has nothing to do with the floppy. But I might unsolder the TS blob, and test the other TOS bank.exxos wrote: Mon Sep 07, 2020 12:51 pm Use FCOPYII and let that run , you can tell better if its stalling on any particular tracks.. you can also increase to 10 sectors to make it a tougher test.
TS jumper is used to connect the UBE chip to the ROM A17 (bank select) so you remove the jumper link connector.. if both are fitted, then your shorting out the UBE output with the jumper link connector... I don't know how UBE chip will react without reset connected either.. you could be randomly switching between TOS versions causing in effect ROM corruption.Steve wrote: Mon Sep 07, 2020 2:39 pm One small anomaly I just noticed is this: On the STFM KIT DUAL TOS kit that is installed (with ube chip) The ube has not been connected to pin 16 of CPU, the bank select jumper is on bk2, but TS is bridged! Which according to your instructions, could mean the ube chip is damaged. I know this probably has nothing to do with the floppy. But I might unsolder the TS blob, and test the other TOS bank.
Hi there. I bought that ToS upgrade from Exxos store, because there was no 1.04 chips, It's a dual TOS chip. I did not need anything to do with the UBE.Steve wrote: Mon Sep 07, 2020 2:39 pmOne small anomaly I just noticed is this: On the STFM KIT DUAL TOS kit that is installed (with ube chip) The ube has not been connected to pin 16 of CPU, the bank select jumper is on bk2, but TS is bridged! Which according to your instructions, could mean the ube chip is damaged. I know this probably has nothing to do with the floppy. But I might unsolder the TS blob, and test the other TOS bank.exxos wrote: Mon Sep 07, 2020 12:51 pm Use FCOPYII and let that run , you can tell better if its stalling on any particular tracks.. you can also increase to 10 sectors to make it a tougher test.
So you think i must have done something to the DMA chip? I can't believe I caused so much of an issue with just the soldering thing i messed up with.Steve wrote: Mon Sep 07, 2020 7:13 pm Okay I added a DMA sip 10k resistor pullup and it's a little better. Managed to load yaart off floppy. Will do more testing tomorrow.
