Search found 18 matches

by wietze
Fri Feb 07, 2020 8:01 pm
Forum: HARDWARE ISSUES
Topic: 1040 STFM and Exxos memory upgrade (1/4mb)
Replies: 15
Views: 185

Re: 1040 STFM and Exxos memory upgrade (1/4mb)

I guess the only thing that can be badly connected is how the memory module is fitted in the sockets then; by logical deduction (since yaart gives 1mb and no errors with socketed simms).

I will measure them as soon as I can.
by wietze
Fri Feb 07, 2020 7:24 pm
Forum: HARDWARE ISSUES
Topic: 1040 STFM and Exxos memory upgrade (1/4mb)
Replies: 15
Views: 185

Re: 1040 STFM and Exxos memory upgrade (1/4mb)

Which caps should I replace on STFM for the reset circuit? I cant seem to find the C100 and C102 as depicted on the pic on the post you made.
by wietze
Fri Feb 07, 2020 7:11 pm
Forum: HARDWARE ISSUES
Topic: 1040 STFM and Exxos memory upgrade (1/4mb)
Replies: 15
Views: 185

Re: 1040 STFM and Exxos memory upgrade (1/4mb)

The cap is soldered wrong? The side that the arrow points to with the minus symbol on it is connected to the left pad, adn the other side to the right; is this wrong?
by wietze
Fri Feb 07, 2020 5:07 pm
Forum: HARDWARE ISSUES
Topic: 1040 STFM and Exxos memory upgrade (1/4mb)
Replies: 15
Views: 185

Re: 1040 STFM and Exxos memory upgrade (1/4mb)

exxos wrote:
Fri Feb 07, 2020 4:04 pm
I would look at the tweaks and fixes section. Things like PSU and reset circuit etc are common to malfunction.
How would you relate this to the memory board malfunctioning, but when the mem upgrade is reverted; the machine works as intended?
by wietze
Fri Feb 07, 2020 3:59 pm
Forum: HARDWARE ISSUES
Topic: 1040 STFM and Exxos memory upgrade (1/4mb)
Replies: 15
Views: 185

Re: 1040 STFM and Exxos memory upgrade (1/4mb)

When the machine has been turned off for a while; and I then start it up; the machine seems to be able to boot significantly further (even to desktop once), than when the machine has been switched on briefly before; then it immediately display bombs. The machine does not give me this behaviour when ...
by wietze
Fri Feb 07, 2020 12:37 pm
Forum: HARDWARE ISSUES
Topic: 1040 STFM and Exxos memory upgrade (1/4mb)
Replies: 15
Views: 185

Re: 1040 STFM and Exxos memory upgrade (1/4mb)

I did treat the memory upgrade board roughly during a previous attempt to upgrade another STFM (which I failed at). But the upgrade module doesn't show visible damage apart from some plastic that got removed from the headers. I currently dont own a diagnostic cartridge. Is there anything else I can ...
by wietze
Fri Feb 07, 2020 10:56 am
Forum: HARDWARE ISSUES
Topic: 1040 STFM and Exxos memory upgrade (1/4mb)
Replies: 15
Views: 185

Re: 1040 STFM and Exxos memory upgrade (1/4mb)

Images attached.
by wietze
Fri Feb 07, 2020 9:56 am
Forum: HARDWARE ISSUES
Topic: 1040 STFM and Exxos memory upgrade (1/4mb)
Replies: 15
Views: 185

1040 STFM and Exxos memory upgrade (1/4mb)

Hi there guys, the past weeks I have been tinkering with the Exxos (2019) memory upgrade on my Rev D stfm board. Being a novice with these things, I decided to remove all chips and put in sockets first, so I could test if my soldering work was actually solid. The result is, that i have all memory pl...
by wietze
Sun Oct 06, 2019 4:11 pm
Forum: NEWS & ANNOUNCEMENTS
Topic: MONGREL REMAKE H4 PRE-ORDER
Replies: 75
Views: 16499

Re: MONGREL REMAKE H4 PRE-ORDER

I ordered the board, I was wondering, if I could add some assorted bits and pieces required to assemble this. I have of course some boards to donor parts; but I suppose there is a part list of common stuff? I heard from Troed that exxos provided a bunch of parts for the first board; will this be the...
by wietze
Fri Jul 12, 2019 7:06 pm
Forum: MONGREL H4 USER BUILDS
Topic: REV H1 information and interest
Replies: 123
Views: 11627

Re: REV H1 information and interest

Please note me down for 1 board. This will keep me busy during the non-demo-coding days :)

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