SpritesMind.Net

Got two of the FDC registers back-to-front: $2009: FDC input port??? (RO) $200B: FDC output port (WO) $200C: FDC Data register (R/W) $200D: FDC Status register (RO) $200E: FDC Control (WO) Also, ports $BE,$BF are used for VDP access... more details to come. I've done ~20-25% of the code now. Mostly ...

I'm working my way through the disassembly of the SMD BIOS.

Some extra info:

$200B: FDC Control??? (WO)
$200C: FDC Data register (R/W)
$200D: FDC Status register (RO)
$200E: FDC output port??? (WO)

I've found the WRITE DATA and FORMAT TRACK routines... more to come as I learn more...

Got a lot of others things planned so if you're able to send data from USB(PC) to Parallel(SMD), I'll let you do it ;) I've got about 73 other projects planned too! :( I wasn't going to do a 'commercial release'. I have an existing PCB with a USB chip and I/O I was going to use as a parallel-port e...

KanedaFr wrote:I was about to start my SMD USB project, exactly what I needed

You too?

Hey, does anyone know if there's a (commented) disassembly of the SMD BIOS floating around the net? I gather Charles McDonald has done at least part of the ROM whilst writing his technical document and the SMD utilities, but I don't see any release of the actual BIOS disassembly from him. I started ...