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RE: [N8VEM-S100:4933] Re: ZFDC Controller under control of the PC-BIOS??

Hi Frank/Gary in particular.  I’m still not clear where to start on figuring out where to start of figuring out why you both cannot boot MSDOS with the ZFDC board and floppies.

To get started and to make sure we all have the same starting points I have uploaded the V3.5 version or the ZFDC 28C256 ROM “monitor” for the board. A .pdf file and .zip file containing the source code, .lst and .hex file is there.

See bottom of this page:



MOST CURRENT ZFDC.Z80  (V3.5   8/15/2014)


Can you confirm that is what you are using.




From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Frank Schieschke
Sent: Friday, August 15, 2014 11:07 AM
To: n8vem...@googlegroups.com
Subject: [N8VEM-S100:4933] Re: ZFDC Controller under control of the PC-BIOS??


Hello John,
a QaD solution is to read out your working 28C256 EEPROM on your ZFDC controller and mail the content.
So we can test the MS-DOS capabilities.


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