OSWORD &B0

OSWORD &B0 (176) - GoMMC access & control GoMMC

On entry:
 XY?0   =send length
 XY?1   =receive length
 XY?2   =command
 XY?3   =subcommand
 XY?4   =&01
 XY?5   =&00
 XY+6...=data
On exit:
 XY?4   =&00 if call actioned
 XY?5   =result byte
 XY+6...=data.

Commands in XY?2 are:
1 - Read GoMMC status, subcommand in XY?3
 XY?3=&01 - return GoMMC ROM number in XY?6
 XY?3=&02 - return MMC card size in XY!6
2 - ?? - Returns data in XY+5
 XY+3=&09 - ?
 XY+3=&0A - ?
3 - Read/Write data to current disk
On entry:
 XY!6 =address
 XY!10=MMC address
 XY!14=data length
 XY?3 =&00 - Read data from current disk
 XY?3 =&01 - Write data to current disk
 XY?3 =&40 - Read data from absolute MMC address
 XY?3 =&41 - Write data to absolute MMC address
4 - Read/Write data to current disk
On entry:
 XY!  =address
 XY!10=MMC address
 XY!14=data length
 XY?3 =&00 - Read data from current disk
 XY?3 =&01 - Write data to current disk

See Also

• http://mdfs.net/Docs/Comp/BBC/Oswords

Jgharston 14:20, 26 May 2009 (UTC)