SWTPC SuperClock II board

Doug Jackson doug at doughq.com
Sat Mar 21 08:00:07 CDT 2020

That's a beautiful board.

While I have no docs, a careful look confirms for me that it would
superimpose something (likely clock data) on a video signal.  The
horizontal and vertical counters, mux and Rom give that away.

I love the layout.   Absoloutly done in the days of tape ar 2 or 4 times.

On Sat, 21 Mar. 2020, 8:26 am William Sudbrink via cctalk, <
cctalk at classiccmp.org> wrote:

> I would bet that that board increases the resolution of one of the early
> SWTPc terminals.  I'm not sure which one.
> Bill S.
> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Kyle
> Owen via cctalk
> Sent: Friday, March 20, 2020 3:52 PM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: SWTPC SuperClock II board
> In the midst of cleaning up, I came across this board. Can't seem to find
> any info online about it. There's another board from another company, not
> SWTPC, with the same name—apparently a timekeeping board for an Apple II.
> https://imgur.com/a/j8pyqMZ
> I assume this is a way to generate a composite video signal with the
> current time displayed? Anyone have schematics or a parts list?
> Thanks, and stay healthy!
> Kyle
> --
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus

More information about the cctalk mailing list