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by rubber_jonnie
Fri Mar 29, 2024 10:05 am
Forum: HARDWARE ISSUES
Topic: ATARi 1040STE keyboard vs standard 520/1040ST
Replies: 8
Views: 169

Re: ATARi 1040STE keyboard vs standard 520/1040ST

Hi Guys, thank you for the inout and happy that some seems interchangeable. @exxos I am also very suspicious re the too white/off color keys on the 520ST, as they seem just wrong and at least 20 other keys are also in this wrong color. So as my 520 ST keyboard is different can, I just put in a keyb...
by rubber_jonnie
Fri Mar 29, 2024 9:58 am
Forum: 8 BIT CORNER
Topic: OSI 600D Superboard Build
Replies: 318
Views: 55343

Re: OSI 600D Superboard Build

So here is the list of things that caused me problems during my build. Everybody will be different, and I'm happy to say I didn't have any shorts at all, but what I did have were some errors of my own making, and some that were baked in to the info I had in front of me. Clock circuit problem 1 - I u...
by rubber_jonnie
Thu Mar 28, 2024 3:05 pm
Forum: 8 BIT CORNER
Topic: OSI 600D Superboard Build
Replies: 318
Views: 55343

Re: OSI 600D Superboard Build

stephen_usher wrote: Thu Mar 28, 2024 2:59 pm Oh, so marginal timings... What fun.
Indeed...
by rubber_jonnie
Thu Mar 28, 2024 2:16 pm
Forum: 8 BIT CORNER
Topic: OSI 600D Superboard Build
Replies: 318
Views: 55343

Re: OSI 600D Superboard Build

OK, so it's fixed. IMG20240328134336.jpg The solution? I replaced the 74LS04 at U21 with a 74S04. According to the build doc I have it should be an an LS, but as soon as I swapped it out, the problem went away. I then looked at other schematics and BoMs and all state an LS04. I tried a bunch of LS04...
by rubber_jonnie
Thu Mar 28, 2024 11:13 am
Forum: HARDWARE DISCUSSIONS
Topic: 12V needed for ST?
Replies: 8
Views: 234

Re: 12V needed for ST?

I usually use a VGA adapter for all my testing so the 12v for SCART isn't required Colour mode? Or perhaps you just have a different VGA adapter to me (exxos' reduced cost version)? Cheers all. BW Whilst I did recently get a VGA adaptor from exxos , I've not tried it with just a 5v setup, but I did...
by rubber_jonnie
Thu Mar 28, 2024 10:14 am
Forum: MEMBER BLOGS
Topic: General Stuff(tm)
Replies: 1700
Views: 323556

Re: General Stuff(tm)

stephen_usher wrote: Thu Mar 28, 2024 8:29 am Looks like the pads are at the local Royal Mail delivery office.
:girldance:
by rubber_jonnie
Thu Mar 28, 2024 10:12 am
Forum: HARDWARE DISCUSSIONS
Topic: 12V needed for ST?
Replies: 8
Views: 234

Re: 12V needed for ST?

Aside from what has been said by the others, which is all good info, yes you can boot to desktop using just 5v.

I usually use a VGA adapter for all my testing so the 12v for SCART isn't required, though if I need to use the serial port for diagnostics I hook up the 12v too, as I have 2 bench PSUs.
by rubber_jonnie
Wed Mar 27, 2024 3:41 pm
Forum: HARDWARE ISSUES
Topic: No clock signal to the Shifter
Replies: 24
Views: 739

Re: No clock signal to the Shifter

With respect to the possibility of using either 2 or 6 chip TOS on this type of board I noticed something that got my attention. On the original 520ST schematic pin 22 OE of the TOS Roms is connected to UDS and LDS and also to the cartridge port. However, on the schematic for the 1040ST the TOS Rom...
by rubber_jonnie
Wed Mar 27, 2024 3:38 pm
Forum: MEMBER BLOGS
Topic: Stuff and Things.
Replies: 1495
Views: 365272

Re: Stuff and Things.

Yeah, seems like it's lost its capacitance a bit. :-) I have loads and loads of capacitors... mostly due to the one I need always being one I don't have. Either the capacitance is wrong or the voltage or the size. I know what you mean. I have a ton of caps, but none are the 10uF 250v variety, so ye...
by rubber_jonnie
Wed Mar 27, 2024 3:35 pm
Forum: MEMBER BLOGS
Topic: Neo Geo - Of the Pocket variety
Replies: 2
Views: 42

Re: Neo Geo - Of the Pocket variety

stephen_usher wrote: Wed Mar 27, 2024 3:07 pm I was going to say that the screen looked nice and crisp. Obviously that's due to your lighting conditions.
Yep that was taken on my workbench in optimum lighting conditions. In good light, the screen is nice, but move somewhere darker and it's not great.

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