View Single Post
Old 29th May 2020, 10:28 pm   #454
SiriusHardware
Dekatron
 
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,485
Default Re: MK14 schematic revisions

I meant the LED display, disregard. We cross posted so I didn't realise you'd already fixed it by the time I hit 'submit'.

You can fit a dinky SM pulldown resistor at JP2 rather than a link and that will make Sense-A available for user programs. Did you also notice that Ian made the reset line available, finally, on the keypad edge connector? Another thing SOC should have done from day one.

As you have the luxury of having keypad switches fitted, check out the contents of 0000, 0200, 0400, 0600 to see if the unwanted PROM images have gone. That's another improvement Ian made, in fact that's the reason for the extra IC, because he wanted to do that and still have the option to use the alternative type of RAM.
SiriusHardware is offline