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... to work correctly but Philip had been unable to get it to operate in his s100computers.com S100 Bus motherboard.   It happened that I had an unbuilt PCB for the same motherboard in my projects ...
... SBC-200.  The SBC-200 is a Z-80 based single board computer for the S-100 bus as is described on www.s100computers.com Philip had spent a couple of months trying to get either of his ...
Restoring vintage computers is sure to mean dealing with old EPROMs.   Many restorers have a modern EPROM programmer (i.e it was cheap, made in China and I got it on eBay) or two but there ...
... RESET pin (pin 21) of both 8251 which sent me back to the schematics for further research. The Northstar motherboard will reset the 8251 on first power up using the S100 Bus /POC line (bus pin 99) ...
... $/insnsd.c \ $/mfdc.c $/n8vem.c $/vfdhd.c \ $/s100_disk1a.c $/s100_disk2.c $/s100_disk3.c\ $/s100_fif.c $/s100_mdriveh.c \ $/s100_mdsad.c $/s100_selchan.c \ $/s100_ss1.c $/s100_64fdc.c ...

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jaquinn@ihug.co.nz http://twitter.com/jaquinn