C301564-001 MEGA STE REV B

MEGA STE motherboards.
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troed
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C301564-001 MEGA STE REV B

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troed
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Re: C301564-001 MEGA STE REV B

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DoG
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Re: C301564-001 MEGA STE REV B

Post by DoG »

Hmm. Where do you locate the revisions on these motherboards? I only see CA400677 in the top left corner under the PSU.
czietz
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Re: C301564-001 MEGA STE REV B

Post by czietz »

DoG wrote: Tue Feb 05, 2019 7:00 pm Hmm. Where do you locate the revisions on these motherboards? I only see CA400677 in the top left corner under the PSU.
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DoG
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Re: C301564-001 MEGA STE REV B

Post by DoG »

Thanks. Sneaky...
displaced
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Re: C301564-001 MEGA STE REV B

Post by displaced »

My board has the same part and revision number, but has a couple of notable differences:

- Blitter is a separate IC, just under the right-hand VME ribbon

- ROM type headers are present and have jumpers fitted above the HI ROM

- An AJAX floppy controller is present, and the support GAL is the correct version for HD floppy support (although the drive itself is a DD Epson model. Can’t have it all I suppose!). The AJAX and GAL *might* be after-market, but the machine’s definitely still got its original FDD.

I’m still intrigued by the SPARE1 and SPARE2 sockets... Spare what, precisely?!

Oh and I just noticed - the two ICs at U8 and U9 are the same half-width as shown in the photo here, but they’re both labelled as “PRE QUAL”. And many more of my GALs have printed paper labels.

Think this machine might’ve been a real “what’ve we got left at the back of the warehouse, Barry?” job! Serial is A1 4003267
A bunch of Ataris and others:
Atari XEGS with RGB mod - STFM - Portfolio - Lynx Mk1 with McWill display - Mega STE - Falcon030 - Jaguar
Commodore VIC-20 CR with ClearVideo - CDTV (Wicher 8MB+IDE)
Acorn Electron - Archimedes A3020
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