nam RBFDefs ttl Random Block File Manager Definitions ********************** * Modification History * * Date Changes Made by * -------- ------------------------------------------------------------ --- * 82/07/13 PD.Exten added to path descriptor rfd * 82/07/13 PE entries defined rfd * 82/07/15 V.FileHd inserted in drive static rfd * 82/09/10 Level One/ Level two cond added WGP * 82/09/17 Record Lock cond added WGP * 82/09/17 PD.SLE renamed to PD.Creat rfd * 82/09/17 V.DiskID, V.BMapSz, V.MapSct added for * smart multi-sector bitmap searching rfd * 82/09/20 reserved areas added in static storage. * 83/06/07 Added InDriver flag in PD.SMF. rfd * 83/06/13 Added PE.Req tmp save for PE.Lock rfd * 83/08/08 reserved PD.SToff for Japanese rfd * 83/11/19 Added V.ResBit in drive tables. rfd * 83/12/12 Added PE.Prior to save process priority. rfd * 83/12/13 Added BufBusy bit in state flag (PD.SMF) rfd * 84/07/06 Added Bit Definitions for DD.FMT MGH * 87/06/23 Updated with Dev Desc Info KKD ******************************* * RBF Device Descriptor Offsets * org M$DTyp rmb 1 Device type (IT.DTP) (1=RBF) IT.DRV rmb 1 Drive number IT.STP rmb 1 Step rate IT.TYP rmb 1 Disk device type (5" 8" other) IT.DNS rmb 1 Density capability IT.CYL rmb 2 Number of cylinders IT.SID rmb 1 Number of surfaces IT.VFY rmb 1 0=verify disk writes IT.SCT rmb 2 Default sectors/track IT.T0S rmb 2 Default sectors/track tr00,s0 IT.ILV rmb 1 Sector interleave offset IT.SAS rmb 1 Segment allocation size ************************************* * IT.TYP/IT.DNS/IT.STP definitions * TYP.5 equ %00000000 5" media TYP.8 equ %00000001 8" media TYP.CCF equ %00100000 CoCo format TYP.NCCF equ %00000000 Non-CoCo format TYP.SOF equ %00000000 Standard OS-9 format TYP.NSF equ %01000000 Non-standard format TYP.FLP equ %00000000 Floppy disk TYP.HARD equ %10000000 Hard disk DNS.FM equ %00000000 Single-density (FM) DNS.MFM equ %00000001 Double-density (MFM) DNS.STD equ %00000000 Single track density (48 tpi) DNS.DTD equ %00000010 Single track density (96 tpi) STP.30ms equ 0 30ms step rate STP.20ms equ 1 20ms step rate STP.12ms equ 2 12ms step rate STP.6ms equ 3 6ms step rate ************************************* * Random Block Path Descriptor Format * org PD.FST PD.SMF rmb 1 State flags PD.CP rmb 4 Current logical byte position PD.SIZ rmb 4 File size PD.SBL rmb 3 Segment beginning lsn PD.SBP rmb 3 Segment beginning psn PD.SSZ rmb 3 Segment size PD.DSK rmb 2 Disk id PD.DTB rmb 2 Drive table ptr org PD.OPT rmb 1 Device type PD.DRV rmb 1 Drive number PD.STP rmb 1 Step rate PD.TYP rmb 1 Disk device type (5" 8" other) PD.DNS rmb 1 Density capability PD.CYL rmb 2 Number of cylinders PD.SID rmb 1 Number of surfaces PD.VFY rmb 1 0=verify disk writes PD.SCT rmb 2 Default sectors/track PD.T0S rmb 2 Default sectors/track tr00,s0 PD.ILV rmb 1 Sector interleave offset PD.SAS rmb 1 Segment allocation size PD.TFM rmb 1 DMA Transfer Mode PD.Exten rmb 2 Path Extension (PE) for record locking PD.SToff rmb 1 Sector/Track offsets (for "foreign" disk formats) PD.ATT rmb 1 File attributes PD.FD rmb 3 File descriptor psn PD.DFD rmb 3 Directory file descriptor psn PD.DCP rmb 4 File directory entry ptr PD.DVT rmb 2 User readable dev tbl ptr * State Flags BUFMOD equ $01 Buffer modified SINBUF equ $02 Sector in buffer FDBUF equ $04 File descriptor in buffer *EOFSEC equ $08 End of file sector *EOF equ $10 End of file InDriver equ $20 Currently in Disk Driver, or queued BufBusy equ $40 Buffer is currently busy ifne Level-1 ************************************ * Random Block Path Extension Format * org 0 PE.PE rmb 1 PE path number PE.PDptr rmb 2 back ptr to this PE's Path Descriptor PE.NxFil rmb 2 Drive Open-File list ptr PE.Confl rmb 2 circular File Conflict list PE.Lock rmb 1 Path lockout status PE.LoLck rmb 4 Low Locked Logical addr PE.HiLck rmb 4 High Locked Logical addr PE.Wait rmb 2 PE ptr to (next) locked-out PE PE.TmOut rmb 2 Max ticks to wait for locked segment PE.Owner rmb 1 Process ID of owner of locked segment PE.Req rmb 1 temp for PE.Lock in GAIN when LockSeg fails PE.Prior rmb 1 tmp for process priority while in driver rmb 32-. reserved PE.FilNm rmb 32 temp for filename during directory search * PE.Lock status codes Unlocked equ 0 no portion of file is locked RcdLock equ 1 record from LoLck to HiLck locked FileLock equ 2 entire file locked EofLock equ 4 End of file is locked endc *********************** * LSN0 Disk Data Format * org 0 DD.TOT rmb 3 Total number of sectors DD.TKS rmb 1 Track size in sectors DD.MAP rmb 2 Number of bytes in allocation bit map DD.BIT rmb 2 Number of sectors/bit DD.DIR rmb 3 Address of root directory fd DD.OWN rmb 2 Owner DD.ATT rmb 1 Attributes DD.DSK rmb 2 Disk id DD.FMT rmb 1 Disk format; density/sides DD.SPT rmb 2 Sectors/track DD.RES rmb 2 Reserved for future use DD.SIZ equ . Device descriptor minimum size DD.BT rmb 3 System bootstrap sector DD.BSZ rmb 2 Size of system bootstrap DD.DAT rmb 5 Creation date DD.NAM rmb 32 Volume name DD.OPT rmb 32 option area * DD.FMT Bit Definitions FMT.SIDE equ %00000001 Single Side=0, Double Side=1 FMT.DNS equ %00000010 Single DNS=0, Double DNS=1 FMT.TDNS equ %00000100 48tpi=0, 96tpi=1 FMT.T0DN equ %00100000 Track 0 DNS, see FMT.DNS ************************ * File Descriptor Format * org 0 FD.ATT rmb 1 Attributes FD.OWN rmb 2 Owner FD.DAT rmb 5 Date last modified FD.LNK rmb 1 Link count FD.SIZ rmb 4 File size FD.Creat rmb 3 Segment list extension FD.SEG equ . Beginning of segment list * Segment List Entry Format org 0 FDSL.A rmb 3 Segment beginning physical sector number FDSL.B rmb 2 Segment size FDSL.S equ . Segment list entry size FD.LS1 equ FD.SEG+((256-FD.SEG)/FDSL.S-1)*FDSL.S FD.LS2 equ (256/FDSL.S-1)*FDSL.S MINSEC set 16 ************************ * Directory Entry Format * org 0 DIR.NM rmb 29 File name DIR.FD rmb 3 File descriptor physical sector number DIR.SZ equ . Directory record size **************** * Static Storage * * Overall Disk Static Storage * * Note: This does not reserve any memory for drive tables. Each Driver is * responsible for reserving sufficient memory for the appropriate * number of tables. * org V.USER Reserve required ($06) V.NDRV rmb 1 Number of drives ($07) rmb 8 reserved ($08) DRVBEG equ . Beginning of drive tables ($10) * * Global Storage For Disk Drive Tables * Each Table Contains The First 'DD.Siz' Bytes * From Sector 0, And The Current Track, Stepping Rate, * Bit-Map Use Flag, And Disk Type * org 0 rmb DD.SIZ Device descriptor, sector 0 V.TRAK rmb 2 Current track V.BMB rmb 1 Bit-map use flag V.FileHd rmb 2 open file list for this drive V.DiskID rmb 2 Disk ID V.BMapSz rmb 1 Bitmap Size V.MapSct rmb 1 lowest reasonable bitmap sector V.ResBit rmb 1 reserved bitmap sector (for compaction) V.ScTkOf rmb 1 Sector/Track byte (Combined from descriptor) V.ScOfst rmb 1 Sector offset split from byte above V.TkOfst rmb 1 Track offset split from byte above rmb 4 reserved DRVMEM equ .