Mercurial > hg > Members > kono > nitros9-code
changeset 1946:34868794d297
Added IT.SOFF1-ITSOFF3 and IT.LLDRV for SuperDrivers.
| author | boisy |
|---|---|
| date | Sun, 11 Dec 2005 14:38:28 +0000 |
| parents | 89bba8b61def |
| children | 62dcfa1de339 |
| files | defs/rbfdefs |
| diffstat | 1 files changed, 363 insertions(+), 349 deletions(-) [+] |
line wrap: on
line diff
--- a/defs/rbfdefs Mon Dec 05 01:15:10 2005 +0000 +++ b/defs/rbfdefs Sun Dec 11 14:38:28 2005 +0000 @@ -1,349 +1,363 @@ - IFNE RBFDEFS-1 - -RBFDEFS set 1 - -******************************************************************** -* RBFDefs - Random Block File Manager Definitions -* -* $Id$ -* -* RBF stands for 'Random Block Filemanager' and is a package of subroutines -* that define the logical structure of a disk and allows access to the files -* in that structure. -* -* The data structures in this file give RBF its 'personality' and are used -* by RBF itself, as well as applications that will require disk I/O. -* -* Edt/Rev YYYY/MM/DD Modified by -* Comment -* ------------------------------------------------------------------ -* 1982/07/13 Robert F. Doggett -* PD.Exten added to path descriptor and PE Entries defined. -* -* 1982/07/15 Robert F. Doggett -* V.FileHd inserted in driver static storage. -* -* 1982/09/10 WGP -* Level One/Level Two condionals added. -* -* 1982/09/17 WGP -* -* 1982/09/17 Robert F. Doggett -* PD.SLE renamed to PD.Creat. -* -* 1982/09/17 Robert F. Doggett -* V.DiskID, V.BMapSz, V.MapSct added for smart multi-sector bitmap searching. -* -* 1982/09/20 Robert F. Doggett -* Reserved areas added in static storage. - -* 1983/06/07 Robert F. Doggett -* Added InDriver flag in PD.SMF. -* -* 1983/06/13 Robert F. Doggett -* Added PE.Req tmp save for PE.Lock. -* -* 1983/08/08 Robert F. Doggett -* Reserved PD.SToff for Japanese. -* -* 1983/11/19 Robert F. Doggett -* Added V.ResBit in drive tables. -* -* 1983/12/12 Robert F. Doggett -* Added PE.Prior to save process priority. -* -* 1983/12/13 Robert F. Doggett -* Added BufBusy bit in state flag (PD.SMF). -* -* 1984/07/06 Mark G. Hawkins -* Added Bit Definitions for DD.FMT. -* -* 1987/06/23 Kevin K. Darling -* Updated with Dev Desc Info -* -* 2003/06/02 Boisy G. Pitre -* Updated comments for clarity. -* Added TYP.256-TYP.2048 definitions for future expansion. -* -* 2004/04/14 Boisy G. Pitre -* Added new entries to device descriptor as per OS-9 Level One V2.00.00 -* addendum. Pointed out by Rodney Hamilton. -* -* 2005/05/31 P.Harvey-Smith. -* Added defines for bit 2 of IT.DNS, which the format command uses to -* determine if a drive should have it's track 0 as single or double density -* - - nam RBFDefs - ttl Random Block File Manager Definitions - - - pag -******************************* -* RBF Device Descriptor Offsets -* -* These definitions are for RBF device descriptors. - - org M$DTyp - rmb 1 Device type (DT.RBF) -IT.DRV rmb 1 Drive number -IT.STP rmb 1 Step rate -IT.TYP rmb 1 Disk device type information -IT.DNS rmb 1 Density capability -IT.CYL rmb 2 Number of cylinders -IT.SID rmb 1 Number of surfaces -IT.VFY rmb 1 Verify disk writes (0 = verify, 1 = don't) -IT.SCT rmb 2 Default sectors/track -IT.T0S rmb 2 Default sectors/track for track 0 sector 0 -IT.ILV rmb 1 Sector interleave offset -IT.SAS rmb 1 Segment allocation size -* The following fields are from the OS-9 Level One V2.00.00 Addendum -IT.TFM rmb 1 DMA Transfer Mode -IT.Exten rmb 2 Path Extension (PE) for record locking -IT.SToff rmb 1 Sector/Track offsets (for "foreign" disk formats) -* The following fields are not copied to the path descriptor -IT.WPC rmb 1 Write precomp cyl/4 (HD) -IT.OFS rmb 2 Starting cylinder offset (HD) -IT.RWC rmb 2 Reduced write current cylinder (HD) - - -* IT.TYP Definitions -* -TYP.HARD equ %10000000 Hard disk -TYP.FLP equ %00000000 Floppy disk -TYP.NSF equ %01000000 Non-standard format -TYP.SOF equ %00000000 Standard NitrOS-9 format - -* IT.TYP bit definitions if bit 7 of IT.TYP is set (hard disk) -TYPH.256 equ %00000000 256 byte sector media -TYPH.512 equ %00000001 512 byte sector media -TYPH.1024 equ %00000010 1024 byte sector media -TYPH.2048 equ %00000011 2048 byte sector media -TYPH.SSM equ %00000011 Sector size mask -TYPH.DRSV equ %00001100 Driver-reserved bits -TYPH.DSQ equ %00010000 Drive size query flag - -* IT.TYP bit definitions if bit 7 of IT.TYP is clear (floppy disk) -TYP.5 equ %00000000 5" media -TYP.3 equ %00000001 3.5" media -TYP.SBO equ %00000010 Sector base offset (clear = 0; sect = 1) -TYP.256 equ %00000000 256 byte sector media -TYP.512 equ %00000100 512 byte sector media -TYP.CCF equ %00100000 CoCo format -TYP.NCCF equ %00000000 Non-CoCo format - -* IT.DNS Definitions -* - -* If bit 7 of IT.TYP is set, IT.DNS is driver-dependent - -* IT.DNS bit definitions if bit 7 of IT.TYP is clear (floppy disk) -DNS.FM equ %00000000 Single-density (FM) -DNS.MFM equ %00000001 Double-density (MFM) -DNS.STD equ %00000000 Single track distance (48/135 tpi) -DNS.DTD equ %00000010 Double track distance (96 tpi) - -* Added PHS,2005-05-31, as format seems to use these -DNS.FM0 equ %00000000 Single density track 0 -DNS.MFM0 equ %00000100 Double density track 0 - -* Floppy disk step rate definitions -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 - - pag -************************************* -* Random Block Path Descriptor Format -* -* A path descriptor is created for every new path that is open -* via the I$Open system call (processed by IOMan). Process -* descriptors track state information of a path. -* - 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 -* -* RBF paths under Level Two have additional information that -* is referenced by the path extension area. -* - 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 Temp for process priority while in driver -PE.SigSg rmb 1 Signal code to send -PE.SigID rmb 1 Process ID to send the signal to - 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 - - - pag -*********************** -* LSN0 Disk Data Format -* -* Logical Sector Number 0 is the first sector on an RBF formatted device -* and contains information about the device's size and 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 - valid only if device is a floppy disk -FMT.SIDE equ %00000001 Single Sided=0, Double Sided=1 -FMT.DNS equ %00000010 Single Density=0, Double Density=1 -FMT.TDNS equ %00000100 Track Density: 48/135 TPI=0, 96 TPI=1 -FMT.T0DN equ %00100000 Track 0 Density, see FMT.DNS - - - pag -************************ -* File Descriptor Format -* -* The file descriptor is a sector that is present for every file -* on an RBF device. It contains attributes, modification dates, -* and segment information on a file. -* - 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 - - - pag -************************ -* Directory Entry Format -* -* Directory entries are part of a directory and define the name -* of the file, as well as a pointer to its file descriptor. -* - org 0 -DIR.NM rmb 29 File name -DIR.FD rmb 3 File descriptor physical sector number -DIR.SZ equ . Directory record size - - - pag -******************** -* RBF 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) - - - pag -**************** -* Global Storage For Disk Drive Tables -* -* Each table contains the first 'DD.SIZ' bytes from -* LSN 0, and the current track, stepping rate, -* bitmap use flag, and disk type. -* - org 0 - rmb DD.SIZ Device descriptor, LSN 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 . - - ENDC - + IFNE RBFDEFS-1 + +RBFDEFS set 1 + +******************************************************************** +* RBFDefs - Random Block File Manager Definitions +* +* $Id$ +* +* RBF stands for 'Random Block Filemanager' and is a package of subroutines +* that define the logical structure of a disk and allows access to the files +* in that structure. +* +* The data structures in this file give RBF its 'personality' and are used +* by RBF itself, as well as applications that will require disk I/O. +* +* Edt/Rev YYYY/MM/DD Modified by +* Comment +* ------------------------------------------------------------------ +* 1982/07/13 Robert F. Doggett +* PD.Exten added to path descriptor and PE Entries defined. +* +* 1982/07/15 Robert F. Doggett +* V.FileHd inserted in driver static storage. +* +* 1982/09/10 WGP +* Level One/Level Two condionals added. +* +* 1982/09/17 WGP +* +* 1982/09/17 Robert F. Doggett +* PD.SLE renamed to PD.Creat. +* +* 1982/09/17 Robert F. Doggett +* V.DiskID, V.BMapSz, V.MapSct added for smart multi-sector bitmap searching. +* +* 1982/09/20 Robert F. Doggett +* Reserved areas added in static storage. + +* 1983/06/07 Robert F. Doggett +* Added InDriver flag in PD.SMF. +* +* 1983/06/13 Robert F. Doggett +* Added PE.Req tmp save for PE.Lock. +* +* 1983/08/08 Robert F. Doggett +* Reserved PD.SToff for Japanese. +* +* 1983/11/19 Robert F. Doggett +* Added V.ResBit in drive tables. +* +* 1983/12/12 Robert F. Doggett +* Added PE.Prior to save process priority. +* +* 1983/12/13 Robert F. Doggett +* Added BufBusy bit in state flag (PD.SMF). +* +* 1984/07/06 Mark G. Hawkins +* Added Bit Definitions for DD.FMT. +* +* 1987/06/23 Kevin K. Darling +* Updated with Dev Desc Info +* +* 2003/06/02 Boisy G. Pitre +* Updated comments for clarity. +* Added TYP.256-TYP.2048 definitions for future expansion. +* +* 2004/04/14 Boisy G. Pitre +* Added new entries to device descriptor as per OS-9 Level One V2.00.00 +* addendum. Pointed out by Rodney Hamilton. +* +* 2005/05/31 P.Harvey-Smith. +* Added defines for bit 2 of IT.DNS, which the format command uses to +* determine if a drive should have it's track 0 as single or double density +* +* 2005/11/23 Robert Gault +* Added IT.MPI giving it duplicate location with IT.TFM. This will not be +* transferred to the path descriptor, thus the equ * rahter than rmb 1. +* +* 2005/12/11 Boisy G. Pitre +* Added IT.SOFF1-ITSOFF3 and IT.LLDRV for SuperDrivers. + + nam RBFDefs + ttl Random Block File Manager Definitions + + + pag +******************************* +* RBF Device Descriptor Offsets +* +* These definitions are for RBF device descriptors. + + org M$DTyp + rmb 1 Device type (DT.RBF) +IT.DRV rmb 1 Drive number +IT.STP rmb 1 Step rate +IT.TYP rmb 1 Disk device type information +IT.DNS rmb 1 Density capability +IT.CYL rmb 2 Number of cylinders +IT.SID rmb 1 Number of surfaces +IT.VFY rmb 1 Verify disk writes (0 = verify, 1 = don't) +IT.SCT rmb 2 Default sectors/track +IT.T0S rmb 2 Default sectors/track for track 0 sector 0 +IT.ILV rmb 1 Sector interleave offset +IT.SAS rmb 1 Segment allocation size +* The following fields are from the OS-9 Level One V2.00.00 Addendum +IT.TFM rmb 1 DMA Transfer Mode +IT.Exten rmb 2 Path Extension (PE) for record locking +IT.SToff rmb 1 Sector/Track offsets (for "foreign" disk formats) +* The following fields are not copied to the path descriptor +IT.WPC rmb 1 Write precomp cyl/4 (HD) +IT.OFS rmb 2 Starting cylinder offset (HD) +IT.RWC rmb 2 Reduced write current cylinder (HD) +* These fields have been added because of SuperDriver. They probably +* can be used in other drivers + org IT.WPC +IT.SOFF1 rmb 1 +IT.SOFF2 rmb 1 +IT.SOFF3 rmb 1 +IT.LLDRV rmb 2 +IT.MPI rmb 1 + + +* IT.TYP Definitions +* +TYP.HARD equ %10000000 Hard disk +TYP.FLP equ %00000000 Floppy disk +TYP.NSF equ %01000000 Non-standard format +TYP.SOF equ %00000000 Standard NitrOS-9 format + +* IT.TYP bit definitions if bit 7 of IT.TYP is set (hard disk) +TYPH.256 equ %00000000 256 byte sector media +TYPH.512 equ %00000001 512 byte sector media +TYPH.1024 equ %00000010 1024 byte sector media +TYPH.2048 equ %00000011 2048 byte sector media +TYPH.SSM equ %00000011 Sector size mask +TYPH.DRSV equ %00001100 Driver-reserved bits +TYPH.DSQ equ %00010000 Drive size query flag + +* IT.TYP bit definitions if bit 7 of IT.TYP is clear (floppy disk) +TYP.5 equ %00000000 5" media +TYP.3 equ %00000001 3.5" media +TYP.SBO equ %00000010 Sector base offset (clear = 0; sect = 1) +TYP.256 equ %00000000 256 byte sector media +TYP.512 equ %00000100 512 byte sector media +TYP.CCF equ %00100000 CoCo format +TYP.NCCF equ %00000000 Non-CoCo format + +* IT.DNS Definitions +* + +* If bit 7 of IT.TYP is set, IT.DNS is driver-dependent + +* IT.DNS bit definitions if bit 7 of IT.TYP is clear (floppy disk) +DNS.FM equ %00000000 Single-density (FM) +DNS.MFM equ %00000001 Double-density (MFM) +DNS.STD equ %00000000 Single track distance (48/135 tpi) +DNS.DTD equ %00000010 Double track distance (96 tpi) + +* Added PHS,2005-05-31, as format seems to use these +DNS.FM0 equ %00000000 Single density track 0 +DNS.MFM0 equ %00000100 Double density track 0 + +* Floppy disk step rate definitions +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 + + pag +************************************* +* Random Block Path Descriptor Format +* +* A path descriptor is created for every new path that is open +* via the I$Open system call (processed by IOMan). Process +* descriptors track state information of a path. +* + 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 +* +* RBF paths under Level Two have additional information that +* is referenced by the path extension area. +* + 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 Temp for process priority while in driver +PE.SigSg rmb 1 Signal code to send +PE.SigID rmb 1 Process ID to send the signal to + 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 + + + pag +*********************** +* LSN0 Disk Data Format +* +* Logical Sector Number 0 is the first sector on an RBF formatted device +* and contains information about the device's size and 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 - valid only if device is a floppy disk +FMT.SIDE equ %00000001 Single Sided=0, Double Sided=1 +FMT.DNS equ %00000010 Single Density=0, Double Density=1 +FMT.TDNS equ %00000100 Track Density: 48/135 TPI=0, 96 TPI=1 +FMT.T0DN equ %00100000 Track 0 Density, see FMT.DNS + + + pag +************************ +* File Descriptor Format +* +* The file descriptor is a sector that is present for every file +* on an RBF device. It contains attributes, modification dates, +* and segment information on a file. +* + 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 + + + pag +************************ +* Directory Entry Format +* +* Directory entries are part of a directory and define the name +* of the file, as well as a pointer to its file descriptor. +* + org 0 +DIR.NM rmb 29 File name +DIR.FD rmb 3 File descriptor physical sector number +DIR.SZ equ . Directory record size + + + pag +******************** +* RBF 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) + + + pag +**************** +* Global Storage For Disk Drive Tables +* +* Each table contains the first 'DD.SIZ' bytes from +* LSN 0, and the current track, stepping rate, +* bitmap use flag, and disk type. +* + org 0 + rmb DD.SIZ Device descriptor, LSN 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 . + + ENDC +