Archiving Software

For the FDC - I talk directly to the hardware, including the DMA chip - but I let the BIOS handle the FDC interrupt (the handler just sets a flag indicating that the current DMA operation if finished). For the video, I talk directly to the video memory for individual character writes, scrolling and for opening/closing text windows, however I use an INT-10h BIOS call to position the cursor. (This is the text windowing library which is supplied with the library for my Micro-C/PC compiler, and I use it for "all kinds of stuff", and have never had a problem running under any version of winblows or DOSemu. The any file access, it's via standard INT-21h DOS services. Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html