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Old 24th Aug 2018, 10:02 am   #89
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,485
Default Re: MK14 schematic revisions

The one in the manual is actually switched as well, so you can swap between Single Step and normal running.

If you use your MK14 from time to time (rather than just maintaining it in running order as a museum piece) the 'New' OS is a big improvement over the old, requiring fewer keypresses to enter each byte of data and also incorporates the support routines for the tape interface (easily built on a bit of veroboard) and a handy jump offset calculator.

I'm surprised to hear that an issue V MK14 would have the 'old' OS, which is distinguished by the fact that it starts up with a '---- --' prompt, rather than the '0000 00' prompt of the 'new' OS.
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