Search found 236 matches

by Atarian Computing
Wed Aug 01, 2018 3:44 pm
Forum: HARDWARE ISSUES
Topic: Atari TT - Bus errors, advice needed! - SOLVED
Replies: 36
Views: 1116

Re: Atari TT - Bus errors, advice needed!

Looking at the schematic, they are all 10K on address and databus.. I would just solder some 4.7K arrays on the bottom of them on the PCB, see if it works before changing them as of course runs the risk of damaging tracks.. Of course its only a guess to your problem, I see problems with bus loading...
by Atarian Computing
Tue Jul 31, 2018 3:46 pm
Forum: HARDWARE ISSUES
Topic: Atari TT - Bus errors, advice needed! - SOLVED
Replies: 36
Views: 1116

Re: Atari TT - Bus errors, advice needed!

Quick update: * noticed that if I remove the ST ram card the machine will boot from floppy and read the floppy fine - But when loading mint it still gives a memory address / bus error in the system log * Running yaart crashed with the ST ram card installed, but not with it removed I know you could ...
by Atarian Computing
Tue Jul 31, 2018 12:39 pm
Forum: STF REMAKE PROJECT
Topic: Ordering the Alpha board
Replies: 139
Views: 4408

Re: Ordering the Alpha board

exxos wrote:
Tue Jul 31, 2018 11:41 am
Snip
Do you have a BOM readily available perhaps?
by Atarian Computing
Tue Jul 31, 2018 12:24 pm
Forum: STF REMAKE PROJECT
Topic: Ordering the Alpha board
Replies: 139
Views: 4408

Re: Ordering the Alpha board

rubber_jonnie wrote:
Tue Jul 31, 2018 12:22 pm
Atarian Computing wrote:
Tue Jul 31, 2018 12:11 pm
Do we source components from donors? As in the special chips?
Yeah, pretty sure you're going to need a donor board of some sort.
No worries, got several. And some NOS chips.
by Atarian Computing
Tue Jul 31, 2018 12:11 pm
Forum: STF REMAKE PROJECT
Topic: Ordering the Alpha board
Replies: 139
Views: 4408

Re: Ordering the Alpha board

Do we source components from donors? As in the special chips?
by Atarian Computing
Mon Jul 30, 2018 8:05 pm
Forum: STF REMAKE PROJECT
Topic: NEW LAYOUT
Replies: 21
Views: 1619

Re: NEW LAYOUT

exxos wrote:
Mon Jul 30, 2018 7:03 pm

Will send off for a price for 5 & 10 boards.... I've cut it down as small as possible to keep proto-costs down.. so half size than normal..

Need some people onboard with buying one and building it up to see if it actually works or not :twisted:
Me! Pick me!
by Atarian Computing
Mon Jul 30, 2018 4:12 pm
Forum: HARDWARE ISSUES
Topic: Atari TT - Bus errors, advice needed! - SOLVED
Replies: 36
Views: 1116

Re: Atari TT - Bus errors, advice needed!

Dang. At this point I'd start looking for corroded/damaged traces with a magnifying glass front and back. The behaviour you describe is typical in a TT when there is damaged circuit.
by Atarian Computing
Sat Jul 28, 2018 4:01 pm
Forum: MEMBER BLOGS
Topic: STFM 4MB SIMM ADAPTER KIT INSTALL BLOG
Replies: 19
Views: 763

Re: STFM 4MB SIMM ADAPTER KIT INSTALL BLOG

I used a hot air station, boiled the solder topside, pulled the chips out one by one with a plier - and all chips still worked afterwards and have been used for subsequent 520ST piggyback RAM upgrades. But yes, you "shouldn't" hot air through-hole etc, but in my experience the ST motherboards can h...
by Atarian Computing
Sat Jul 28, 2018 3:46 pm
Forum: CHAT FORUM
Topic: My new toy :)
Replies: 14
Views: 723

Re: My new toy :)

Just to mention that Mega STE has some other extras: VME bus, Apple Talk type LAN port (if I remember correct) . ACSI-SCSI adapter - what is not from fastest ones . HD floppy support - but not HD drive in all by factory . Also option to install FPU on the board. And we know how much exxos loves FPUs!