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Re: CFFA Run 4: Accepting pre-orders
- Subject: Re: CFFA Run 4: Accepting pre-orders
- From: Mark McDougall <markm@vl.com.au>
- Date: Tue, 28 Mar 2006 10:08:10 +1000
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Mark McDougall wrote:
Obviously it requires special software on a PC, for example, to create
the floppy disk images on the CF (or copy them directly from a real
floppy drive on the A2 itself), and then firmware on the CFFA to
'emulate' a floppy drive.
For DOS 3.3 to work out-of-the-box you'd have to actually emulate the
disk ][ interface on the CFFA.
As an example, for my TRS-80 FPGA implementation I emulated the register
interface of the WD1793 disk controller which actually talked to a SPI
flash chip which held 2 TRS-80 floppy disk images. I could boot
NEWDOS/80 directly from the 'floppy' images in SPI flash.
Regards,
--
Mark McDougall, Engineer
Virtual Logic Pty Ltd, <http://www.vl.com.au>
21-25 King St, Rockdale, 2216
Ph: +612-9599-3255 Fax: +612-9599-3266