SD floppy emulator on IBM PS/2 for data transfer

HxC Floppy Emulator on IBM PC and compatible support
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ardent-blue
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Joined: Thu Jul 11, 2019 3:48 pm

SD floppy emulator on IBM PS/2 for data transfer

Post by ardent-blue » Thu Jul 11, 2019 4:41 pm

Another hill to die on...

I want to use a SD floppy emulator strictly as a file transfer device, so no need for floppy images... Expected file sizes range up to at least 10-15MB. Target systems use the media sense 34 pin floppy header [Model 8590 and Model 8595, specifically].

Can the emulator [in theory] support the 2.88MB FDC? Transfer could be 1Mbit/s...
SD emulator will be second drive , and that might be a non-twisted cable [A: has pins 9-16 twisted]
Floppy cable has power and signal, but we can snip those lines in the floppy cable and pull the +5v from a 4-pin drive cable.

Some background information:
http://ps-2.kev009.com/ohlandl/floppy/floppy_index.html

82077A FDC datasheet
http://ps-2.kev009.com/ohlandl/floppy/290166.pdf

Floppy Drive Pinouts
http://ps-2.kev009.com/ohlandl/floppy/F ... #34-pin_MS

Model 90 Information
http://ps-2.kev009.com/ohlandl/9590/9590_Common.html

Model 95 information
http://ps-2.kev009.com/ohlandl/9595/8595-9595.html

So here I lie under the blue IBM banner, and the clones are surging into the pass again... I pick up my horn...

Jeff
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Re: SD floppy emulator on IBM PS/2 for data transfer

Post by Jeff » Thu Jul 18, 2019 1:13 pm

1Mbit/s rate is not supported by the SD HxC emulators but 2.88MB may be working @ 500Kbits/s

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