A2osX/_Docs/LIBBLKDEV.md

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#GetProDOSCatSize

• Compute space needed for ProDOS Catalog

##In :

• PUSHW = DevSize (in 512b blocks)

##Out :

• X=BlockCount (max 22)
• A=PageCount (max 44)

#BuildProDOSCat

##In :

• PUSHW = DevSize (in 512b blocks)
• PUSHW = VolName (PSTR)
• PUSHW = DstBuf (Zero filled)
• Blk0 : ProDOS.BootBlk
• Blk1 : SOS.BootBlk
• Blk2,3,4,5 : Volume Directory
• Blk6.... : Volume Bitmap (4096/Blk)
• max devSize = 65535 -> max 16 Bitmap Blk
• absolute MAX DstBuf size=
• 7 for Disk II(280blk),3.5(1600),3.5HD(2880)
• 22 for 32mb Hardisk...

#TrkW16s Write a track (16 sectors)

##In:

• PUSHW = Ptr to 16*256 buffer
• PUSHB = TrackNum * 4 : 0->140+
• PUSHB = DSSS0000

##Out:

• CC : success
• CS : A = Error

• A=0, currently starting/seeking...
  

#TrkWNIB Write a track (NIBBLE)

##In:

• PUSHW = Ptr to NIBBLE buffer (0 ended)
• PUSHB = TrackNum * 4 : 0->140+
• PUSHB = DSSS0000

##Out:

• CC : success
• CS : A = Error

• A=0, currently starting/seeking...