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RE: [N8VEM-S100:4931] Re: ZFDC Controller under control of the PC-BIOS??

Will try and get to it this weekend guys,  So I’m clear, need to check/get working the ability to do multi-sector read & writes of a MS-DOS formatted disk (3.5”, PC formatted), using the 8086 Monitor X commands.

Please confirm/change/correct before I start.






From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Frank Schieschke
Sent: Thursday, August 14, 2014 11:38 PM
To: n8vem...@googlegroups.com
Subject: [N8VEM-S100:4931] Re: ZFDC Controller under control of the PC-BIOS??


Hello Gary,
the PDF ZFDC.Z80 file is the version 2.9.
The contained ZFDC.Z80 in the ZIP file is the version 3.0 from 5/6/2011.
In further versions, John adds some new "MS-DOS" controller commands:

CMD_DOS_RD_MULTI_SEC    EQU 2BH  ;MS-DOS, Read data from multiple sectors starting at the CURRENT sector.
CMD_DOS_WR_MULTI_SEC    EQU 2CH   ;MS-DOS, Write data to multiple sectors starting at the CURRENT sector.
CMD_GET_SIDE  EQU 2DH  ;Get the current selected side of the current selected drive
CMD_DOS_SET_SECTOR EQU 2EH  ;MS-DOS, Set current sector for the next sec R/W

When you call these commands from the 80X86 BIOS/Monitor you get the "3DH" error (CMD_RANGE_ERR    EQU    3DH        ;CMD out or range).
I had asked John for the newest version of the ZFDC.Z80, but he is very busy at the moment.
He promised to send the file, when he has time again.


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