Search found 1655 matches

by exxos
Sat Apr 21, 2018 5:50 pm
Forum: HARDWARE DISCUSSIONS
Topic: Suska board
Replies: 35
Views: 1221

Re: Suska board

If I can find my original AH IDE interface I might be able to access the card on my STFM, then use USatan.. worth a try, but a bit long winded.
by exxos
Sat Apr 21, 2018 10:17 am
Forum: PSU (power supplies)
Topic: TT/Mega STE power supply headaches
Replies: 25
Views: 205

Re: TT/Mega STE power supply headaches

0.7V is enough to turn the transistors on... 1.1V on C-E is the voltage drop across the transistor (pulled high by resistor to 5V). That transistor should not be turned on.. its why I suggest a second diode to drop the voltage 0.5V...
by exxos
Sat Apr 21, 2018 8:42 am
Forum: HARDWARE DISCUSSIONS
Topic: Suska board
Replies: 35
Views: 1221

Re: Suska board

Is the SD card over an IDE bus? Then yeah, those need to be byteswapped for TOS and will then not be visible to the PC. Unless you run a patched TOS that can boot from non-byteswapped media. ACSI doesn't have that issue. (I think, this is really PPera's field) I assume IDE.. I've not looked.. thoug...
by exxos
Sat Apr 21, 2018 8:18 am
Forum: HARDWARE DISCUSSIONS
Topic: Suska board
Replies: 35
Views: 1221

Re: Suska board

TOS 2.06 will four bomb if no floppy is attached and no boot drive, I think. I would test with something newer than HDDriver 8. I can't get anything on the SD card thats the problem ;) I'm stuck with a demo of HD8 on there.. ( I have HD 10.01 in fact) If I take the card Wolfgang supplied, format it...
by exxos
Fri Apr 20, 2018 9:48 pm
Forum: PSU (power supplies)
Topic: TT/Mega STE power supply headaches
Replies: 25
Views: 205

Re: TT/Mega STE power supply headaches

If ZD3 was like 6Volts, then the 5V would have OVP anyway... Though assuming that was true.. why bother taking a tap of the transformer as well anyway :shrug: To tried to think right now.. but could be some forum of funky circuit where the negative rail swings positive turning on Q2 as the PSU turns...
by exxos
Fri Apr 20, 2018 8:28 pm
Forum: HARDWARE DISCUSSIONS
Topic: Suska board
Replies: 35
Views: 1221

Re: Suska board

From what I can tell, the CF card Wolfgang supplied as a demo version of HD8 on it. I can do a 1MB partition with TOS box selected, and Suska will boot to desktop that way..BUT.. If I format as DOS & TOS , still doing the same 1MB partition, Suska just comes up with four bombs after the Atari logo a...
by exxos
Fri Apr 20, 2018 6:16 pm
Forum: PSU (power supplies)
Topic: TT/Mega STE power supply headaches
Replies: 25
Views: 205

Re: TT/Mega STE power supply headaches

I think the circuit around Q2 is shorting out C23 when it sees overvoltage on the -12V tab on the transformer.. So for some reason the voltage there I assume is slightly too high pushing the Q2 base voltage high enough stop C32 from charging... Is why I suggested adding in another diode series with ...
by exxos
Fri Apr 20, 2018 6:00 pm
Forum: PSU (power supplies)
Topic: TT/Mega STE power supply headaches
Replies: 25
Views: 205

Re: TT/Mega STE power supply headaches

PG only seems to be checking overvoltage on a transformer tap which drives the -12V rail... Think over volting on the other rails are not going to be detected..

So I think it is clear the problem is circulating around Q2.. You could try another diode in series with D10.. And see if that works..
by exxos
Fri Apr 20, 2018 5:02 pm
Forum: NEWS & ANNOUNCEMENTS
Topic: STFM case remake
Replies: 97
Views: 5160

Re: STFM case remake

Sorry to hear that. What company is it again? http://www.ua3dprinting.ie/ I asked if it was possible to print right from the start, they said yes, but clearly not. They said the top part was the problem, they had done the bottom part, I asked for a image.. they said they send one.. never did.. they...
by exxos
Fri Apr 20, 2018 4:32 pm
Forum: NEWS & ANNOUNCEMENTS
Topic: STFM case remake
Replies: 97
Views: 5160

Re: STFM case remake

Still nothing from this company.. They said a couple of days it be sent and that was over a month ago. I asked them to refund the order over a week ago and I have not heard anything from them, so I just emailed them yet again to cancel and refund my order. I think over five months is clear they are ...