Search found 463 matches

by troed
Fri Nov 30, 2018 9:43 pm
Forum: HARDWARE DISCUSSIONS
Topic: Project: HDMI/DVI out for STFM
Replies: 429
Views: 28852

Re: Project: HDMI/DVI out for STFM

Thanks Ijor - perfect insight. I should've caught that - I spent quite some time looking into "snooping the bus" on ST and STE (different methods, but reading Shifter palette register values is one).

I can reproduce the problem and I do have a 16 channel LA.

/Troed
by troed
Fri Nov 30, 2018 12:08 pm
Forum: HARDWARE DISCUSSIONS
Topic: Project: HDMI/DVI out for STFM
Replies: 429
Views: 28852

Re: Project: HDMI/DVI out for STFM

I've tested on both an STFM with SMT chips (the doubleST machine, xx589 or what that MB revision is) as well as with a 520ST rev.B. I don't recall if I tested on another STF as well (I think I did but can redo).

/Troed
by troed
Wed Nov 28, 2018 7:11 am
Forum: STE V1 32MHz BOOSTER
Topic: STE V1.5 32MHz BOOSTER - STATUS
Replies: 426
Views: 26453

Re: STE V1.5 32MHz BOOSTER - STATUS

PD pin configuration is controlled by the design file, and appears as a separate fuse bit in the JEDEC file. When the power-down feature is not specified in the design file, the IN/PD pin will be configured as a regular logic input. Note: Some programmers list the 22V10 JEDEC compatible 22V10C (no ...
by troed
Tue Nov 27, 2018 7:11 am
Forum: STE V1 32MHz BOOSTER
Topic: STE V1.5 32MHz BOOSTER - STATUS
Replies: 426
Views: 26453

Re: STE V1.5 32MHz BOOSTER - STATUS

I can only assume these CPU's are really old, and actually more like 10MHz parts restamped as 20MHz parts or something. Yeah restamping has become a huge issue when sourcing parts. I bought a bunch of ST 27C256 EPROMs a while back and even though all of them were clearly stamped as being M27C256 (S...
by troed
Mon Nov 26, 2018 11:43 am
Forum: STF REMAKE PROJECT
Topic: MMU SMT ADAPTERS - WIP
Replies: 27
Views: 1376

Re: MMU SMT ADAPTERS - WIP

exxos wrote:
Thu Nov 22, 2018 10:02 pm
troed wrote:
Thu Nov 22, 2018 9:44 pm
I lied. The doubleST machine is SMT ... :) Still needed?
oh sweet! yes, I still need to know the GND connections for the GLUE I think it was...
Done :)

viewtopic.php?f=31&t=149&p=14469#p14469
by troed
Fri Nov 23, 2018 10:57 pm
Forum: ELECTRONICS
Topic: Lead-free soldering
Replies: 46
Views: 1865

Re: Lead-free soldering

No wonder I completely oxydised by last tip in a few weeks... I've been soldering at 400+ C leadless. At this exact moment I'm trying 330 C and it works just fine. Taking better care of the tip as well, keeping it tinned, cleaning it with copper wool intermittently. Yeah I only use copper wool. No ...
by troed
Fri Nov 23, 2018 10:36 pm
Forum: ELECTRONICS
Topic: Lead-free soldering
Replies: 46
Views: 1865

Re: Lead-free soldering

Yeah that's high. I'm at around 300 for normal work, and only raise the temperature if I'm going to do some stubborn pins connected to big sinks.
by troed
Thu Nov 22, 2018 9:44 pm
Forum: STF REMAKE PROJECT
Topic: MMU SMT ADAPTERS - WIP
Replies: 27
Views: 1376

Re: MMU SMT ADAPTERS - WIP

troed wrote:
Fri Oct 26, 2018 10:12 pm
exxos wrote:
Fri Oct 26, 2018 7:43 pm
Dang it...

The 80 pin pinout doesn't list the GND connections :roll:

Does anyone have a board they can check ??? I don't seem to have one :(
Sorry, just switched out my last SMT board last weekend :(
I lied. The doubleST machine is SMT ... :) Still needed?
by troed
Thu Nov 22, 2018 10:12 am
Forum: ST
Topic: CO700115 REV. 2B with Piggyback RAM expansion.
Replies: 11
Views: 1122

Re: CO700115 with Piggyback RAM expansion.

I can't quite make out the revision, I will update when I have it apart again, but it has a piggyback RAM expansion. Anybody else think those wires look like telephone cable? Very very early motherboard - no filters. And yes, that's typical extracted wires from a telephone extension - I've used the...
by troed
Wed Nov 21, 2018 8:09 am
Forum: HARDWARE DISCUSSIONS
Topic: 520ST small model w/ no floppy / general advice
Replies: 22
Views: 1228

Re: 520ST small model w/ no floppy / general advice

I'm confused by it claiming to have 4MB. I can only see 2.5MB. The MMU is of a model that supports different sized banks so I don't have an immediate opinion.