• Please review our updated Terms and Rules here

Sinclair MK14 starting up okay but not accepting keypresses

OK - I found a reference to a 'Subroutine Handler' which was submitted to the British Electronics Hobby Magazine 'Practical Electronics', December 1979, page 69. The issue is available to read online on the 'World Radio History' website (The relevant page of the PDF is page 71) but I don't know if the rules here allow a direct link to the PDF in a post.

If you can find the issue / pages online, locate the paragraph titled 'SC/MP Subroutine stacker' and associated code in fig.7. They describe a mechanism to allow a more CALL and RET like subroutine calling method.
 
Yes, I did mean specifically SC/MP II.
I'm interested, as when I get me and my hobby stuff on the same side of the planet at the same time I'm going to have a go at resurrecting my wire-wrap NIBL system as a PCB, probably with heaps and heaps of RAM and switchable EPROMs. I then want to dick about with it for a bit, maybe playing with (assembling from source and then enhancing) the various monitors. I'm planning a bespoke bus and the ability to swap in other processors like 2 MHz 6809 and 14 MHz 6502. I'll also be looking to build a keypad and 7-segment display thing too at some point.
 
My interest is specifically in the MK14 which (as it stands) is not capable of running NIBL but there are people on the forum I linked to a couple of posts ago who are into the SC/MP more generically and have more interest in that area.

Have you come across the various PIC based SC/MP emulator projects by the late Karen Orton? One was an emulator of the MK14 specifically (the 'PIC14'), but she made other 'SC/MP' computer systems, including one which runs NIBL, using little more than a PIC.

I appreciate your interest is obviously focused on real 'legacy' hardware but it's an interesting way to run NIBL.
 
Back
Top