SIO Command $E7 New Disk

This is a command for Device $70 - The FujiNet Device itself (see SIO-Commands-for-Device-ID-$70).

New Disk ($E7)

Description

Given the following parameters:

• Number of total sectors
• Sector Size
• Host Slot
• Device Slot

Create a new, blank disk image on the specified host.

Parameters

DCB	Value
DDEVIC	$70
DUNIT	$01
DCOMND	$E7
DSTATS	$80
DBUF	newDisk buffer (262 bytes)
DTIMLO	$E0
DBYT	42
DAUX1	0
DAUX2	0

Examples

C

union
{
  struct
  {
    unsigned short numSectors;
    unsigned short sectorSize;
    unsigned char hostSlot;
    unsigned char deviceSlot;
    char filename[256];
  };
  unsigned char rawData[262];
} newDisk;
       
    OS.dcb.ddevic=0x70;
    OS.dcb.dunit=1;
    OS.dcb.dcomnd=0xE7;
    OS.dcb.dstats=0x80;
    OS.dcb.dbuf=&newDisk.rawData;
    OS.dcb.dtimlo=0x0f;
    OS.dcb.dbyt=42;
    OS.dcb.daux=0; 
    siov();

Apple2 specific

For Apple2, an additional field 't' was added to specify disk image type:

t	description
0	Unadorned (.PO)
1	2MG

This makes the structure:

offset	Description
0	Length (LO)
1	Length (HI)
2	Host Slot (0-7)
3	Disk slot (0-3)
4	Type (0 = PO, 1 = 2MG)
5-8	# of blocks
9-263	Path

See Also

To be done