MZ-80B project (Floppy Disk I/O Card cloning!)

Pyewacket
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Joined: Sat Jul 20, 2019 1:01 pm

Re: MZ-80B project (Floppy Disk I/O Card cloning!)

Post by Pyewacket »

Any news regarding this?
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dat-alex
Posts: 19
Joined: Tue Dec 04, 2018 7:18 am

Re: MZ-80B project (Floppy Disk I/O Card cloning!)

Post by dat-alex »

Hi my friend...

Still searching for a good candidate schematic to 'emulate' via fpga design.
Ia m thinking of implementig K & P FDC800 card

https://original.sharpmz.org/usedskdrives.htm

According to datasheet controller chip has the same mapping with original mz80b chip FDD controller
So why not?
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S_U_C
Posts: 38
Joined: Sun Feb 17, 2019 6:41 pm

Re: MZ-80B project (Floppy Disk I/O Card cloning!)

Post by S_U_C »

Hi I found a large A3 scan of the MZ-80A floppy disk card, this will work in the B if you dissable the CS/CE to the EPROM IC 3 PIN 8 to IC 5 PIN 1. add pull-up resister to IC 5 PIN 1
Attachments
img007.jpg
img009.jpg
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dat-alex
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Re: MZ-80B project (Floppy Disk I/O Card cloning!)

Post by dat-alex »

Thank you for A3 scan S_U_C, Have a nice evening
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dat-alex
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Re: MZ-80B project (Floppy Disk I/O Card cloning!)

Post by dat-alex »

Well after alot of searching around with no result I decided to give a try to the following (in progress) project:

I took the schematic (thanks to Martin8bity)
FDC800_origin.jpg
and re-designed it using XC9536 for digital part and original WD1773 FDD chip
FDC800_CPLD.jpg
my 1773 chip just arrived yesterday after a lot of wait. So I can give my project a try!

I will let you know with the results
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tingo
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Re: MZ-80B project (Floppy Disk I/O Card cloning!)

Post by tingo »

That looks interesting. Keep us updated.
--
Torfinn
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