A2osX/.Docs/LIBBLKDEV.md
2018-07-24 08:24:23 +02:00

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# GetProDOSCatSize
Compute space needed for ProDOS Catalog
## C
int getprodoscatsize (short int options, short int catsize, int devsize );
## ASM
**In:**
PUSHW = DevSize (in 512b blocks)
PUSHB = Catalog Size (in blocks)
PUSHB = Options
**Out:**
X=BlockCount (max 22)
Y,A=BufSize (max $4400)
# BuildProDOSCat
**In:**
PUSHW = DevSize (in 512b blocks)
PUSHB = Catalog Size (in blocks)
PUSHB = Options
PUSHW = VolName (PSTR)
PUSHW = DstBuf (Zero filled)
Blk0 : ProDOS.BootBlk
Blk1 : SOS.BootBlk
Blk2...n : Volume Directory
Blkn+1.. : 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...