Search found 3275 matches

by PhilC
Wed Sep 19, 2018 10:40 pm
Forum: ALPHA USER BUILDS
Topic: Icky - Progress
Replies: 673
Views: 92338

Re: Icky - Progress

exxos wrote:
Wed Sep 19, 2018 10:34 pm
My "bag of bits" arrived at the assembly place today, they suggest I may get it back sometime next week.. so I can join in the fun then as well :)
Cool, looking forward to you getting yours. I may crack open my Mega so that I've got something to copy as well.
by PhilC
Wed Sep 19, 2018 10:38 pm
Forum: DiagROM
Topic: DiagROM for ST
Replies: 133
Views: 36898

Re: DiagROM for ST

I'll burn it to a couple of eproms ready tomorrow night.

What size are they 27c512?
by PhilC
Wed Sep 19, 2018 10:27 pm
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress
Replies: 213
Views: 33153

Re: Forgottenmyname - Progress

Didn't have a new socket but pretty sure everything is making contact now. I did have /halt low when I restarted, so will check the socket connections tomorrow for poorly soldered joints. Gained Desoldering +1 tonight. Have finally cracked the art of good Desoldering.... top tip patience and a whole...
by PhilC
Wed Sep 19, 2018 7:31 pm
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress
Replies: 213
Views: 33153

Re: Forgottenmyname - Progress

So, had a good look at the socket for the ROM and I'm sure that one whole side is not quite lining up properly, so will bite the bullet and turn it the right way round. (I'd modified the notches on the socket before for my mistake instead of just unsoldering etc.
by PhilC
Wed Sep 19, 2018 11:44 am
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress
Replies: 213
Views: 33153

Re: Forgottenmyname - Progress

Unfortunately guilty as charged. Everything looks lined up ok but will meter it later on when I get home
by PhilC
Tue Sep 18, 2018 9:42 pm
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress
Replies: 213
Views: 33153

Re: Forgottenmyname - Progress

Ok, so all three ROM1,2,3 inputs have to be high to disable the /OE on the ROM. Can you think of any reason that the GLUE is disabling the ROM?

I don't suppose there's some GLUE logic diagram around anywhere is there?
by PhilC
Tue Sep 18, 2018 9:15 pm
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress
Replies: 213
Views: 33153

Re: Forgottenmyname - Progress

Just looking at the schematic for the ROM, on the Mega and ST A16 is also /OE on the ROMS but on the STF A16 is an individual entity. Should this be tied into /OE as well? I'm getting /OE mostly high on the ROM but with a few small blips once in a while. /OE Being high is Read disabled right?
by PhilC
Tue Sep 18, 2018 8:03 pm
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress
Replies: 213
Views: 33153

Re: Forgottenmyname - Progress

All 5 yes
by PhilC
Tue Sep 18, 2018 7:57 pm
Forum: ALPHA USER BUILDS
Topic: Icky - Progress
Replies: 673
Views: 92338

Re: Icky - Progress

exxos wrote:
Tue Sep 18, 2018 7:57 pm
Forgottenmyname wrote:
Tue Sep 18, 2018 7:54 pm
I'll have to engage /shoppingmode if Exxos carryies on. I havent got enough for every pin on the cpu :P
All others are fine :)
Just quoting you on that.... for the record like.....
by PhilC
Tue Sep 18, 2018 7:54 pm
Forum: ALPHA USER BUILDS
Topic: Icky - Progress
Replies: 673
Views: 92338

Re: Icky - Progress

Icky wrote:
Tue Sep 18, 2018 7:17 pm
exxos wrote:
Tue Sep 18, 2018 6:25 pm


So much fun to be had :P :lol: :twisted:
Great fun - just been hunting for 2.2k resistors in my parts bins. None to be found time to start desoldering some from that donor ST I have.
I'll have to engage /shoppingmode if Exxos carryies on. I havent got enough for every pin on the cpu :P

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