fdd-cdx2

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Where can I get ROM Image?

1

Want to reproduce this board. Will it work with 1.44 Mb dual side 3.5 " drive? Can't find ROM image

alex3331

Hi, I was looking at the original Microsol CDX-2 schematic. https://www.msxpro.com/hardware/esquemas/cdx-2.pdf I found some differences like replacing the obsolete 74LS16 by the 74LS06. And replacing the decoupling ceramic capacitors 47nf...

melvimchang

Hello, on the board schematic, resistor R5 is 39K and R6 is 12K. In the photos of your assembled board, R5 is 10K and R6 is 5K7(?). Why this change?...

amazingcobrazil

I assembled the board, but i couldn't use it with a Spectravideo SVI-728 as it does not recognise the interface. I burned 4 or 5 different roms but with no...

chriskgnr