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by PhilC
Sat Oct 27, 2018 10:23 am
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress
Replies: 213
Views: 19522

Re: Forgottenmyname - Progress

So I'm finally admitting to myself that I don't yet know enough about microelectronic signals to do anything other than guess what's going on, though I have learnt a lot doing this which is cool. Will put the STF on the shelf for a bit whilst I do some more reading and then check things with a worki...
by PhilC
Sat Oct 27, 2018 10:18 am
Forum: ALPHA DEVELOPMENT INFO
Topic: MMU SMT ADAPTERS - WIP
Replies: 73
Views: 8844

Re: MMU SMT ADAPTERS - WIP

Got another STFM coming in the post the next couple of days, hopefully that will have an SMT MMU.
by PhilC
Fri Oct 26, 2018 5:39 pm
Forum: ALPHA USER BUILDS
Topic: R_J Progress
Replies: 71
Views: 7922

Re: R_J Progress

Glad you are finally able to come out to play RJ :D
by PhilC
Fri Oct 26, 2018 5:36 pm
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress
Replies: 213
Views: 19522

Re: Forgottenmyname - Progress

Not so far Paul, although I am getting closer.

I've now got the ROM being accessed, although only for about a second and then nothing else, so i'm presuming something is unable to read the ROM and then stopping,
by PhilC
Fri Oct 26, 2018 2:38 pm
Forum: ALPHA DEVELOPMENT INFO
Topic: Video driver thoughts
Replies: 272
Views: 22079

Re: Video driver thoughts

Same for me, ready for when I get it fixed :roll:

Then time to print some more supports.
by PhilC
Thu Oct 25, 2018 9:16 pm
Forum: ALPHA USER BUILDS
Topic: Sandord - progress
Replies: 115
Views: 11229

Re: Sandord - progress

What I have had to do at times with old circuit boards is remove all that you can, then desolder the joint and then whilst the solder is still liquid, resuck it back out. Also you'll find that moving the pin from one side of the hole to the other may help with your level of success.
by PhilC
Thu Oct 25, 2018 8:57 pm
Forum: ALPHA USER BUILDS
Topic: Sandord - progress
Replies: 115
Views: 11229

Re: Sandord - progress

You may need to put plenty of flux on the pins, and have the iron nice and hot. I desolder at around 400C. Then the solder sucker has to pretty much fit round the pin whilst you are heating it. So my Solder sucker is melted to fit shall we say.
by PhilC
Thu Oct 25, 2018 8:04 pm
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress
Replies: 213
Views: 19522

Re: Forgottenmyname - Progress

Thanks Paul, So, just learning some of the GLUE logic. The CPU isn't Halted, all the clocks are good but I've got /OE high on the ROM, so no ROM reading yet. On the GLUE RDY is low, so I presume some of the prerequisites required by the GLUE haven't yet been made, does anyone have any details as to ...
by PhilC
Thu Oct 25, 2018 6:38 pm
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress
Replies: 213
Views: 19522

Re: Forgottenmyname - Progress

Just wondering if something is touching where it shouldnt underneath.

made some progress, now getting black border and grey screen but no boot yet
by PhilC
Thu Oct 25, 2018 5:57 pm
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress
Replies: 213
Views: 19522

Re: Forgottenmyname - Progress

Sods law, got loads of 4.7k sils but no 1k. Does anyone know if 4.7k will act ok as the pull ups on the STF mods?

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