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changeset 1988:b96143206d83

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Added more definitions as I have worked them out :)
author afra
date Mon, 30 Jan 2006 23:13:04 +0000
parents b2f58a220c08
children 656c857bda2d
files 3rdparty/roms/dos/SuperDos/dosdefs.asm
diffstat 1 files changed, 164 insertions(+), 5 deletions(-) [+]
line wrap: on
line diff
--- a/3rdparty/roms/dos/SuperDos/dosdefs.asm	Mon Jan 30 23:12:27 2006 +0000
+++ b/3rdparty/roms/dos/SuperDos/dosdefs.asm	Mon Jan 30 23:13:04 2006 +0000
@@ -1,5 +1,5 @@
 ;
-; SuperDos E6, Copyright (C) 1986 ???, Compusense.
+; SuperDos E6, Copyright (C) 1986 ???, Grosvenor.
 ;
 ; Disassembled 2004-11-05, P.Harvey-Smith.
 ;
@@ -39,6 +39,11 @@
 
 TrackPrecomp	EQU		$10		; Track to enable precomp if greater
 
+SectorsPerTrack	EQU		$12		; Sectors per track
+
+MaxDriveNo	EQU		$04		; Maximum valid drive no
+MaxFilenameLen	EQU		$0E		; Max filename length, DriveNo:Filename.EXT
+
 ;
 ; Boot command related.
 ;
@@ -50,6 +55,13 @@
 BootEntryAddr	EQU		$2602		; Boot entry address
 
 ;
+; Dir track related
+;
+
+DirPrimary	EQU		$14		; Primary dir track is track 20
+DirBackup	EQU		$10		; Backup on track 16
+
+;
 ; DOS Low memory variables
 ;
 
@@ -64,19 +76,28 @@
 DosLastDrive	EQU		$00EB		; Active/last used drive number (1-4)
 DosDiskError	EQU		$00F0		; Disk error status byte
 DosCurrCtrlBlk	EQU		$00F1		; Current file control block (0..9) $FF=no files open
+DosBytesInDTA	EQU		$00F2		; Number of bytes in DTA (also used for tracks in DSKINIT).
+DosNoBytesMove	EQU		$00F3		; Number of bytes to transfer to/from buffer
+DosRecLenFlag	EQU		$00F4		; Record length flag, 00 don'r care $FF=do care
+DosIRQTimeFlag	EQU		$00F5		; Dos IRQ timeout flag, 00=check for timeout
 DosIOInProgress	EQU		$00f6		; I/O currently in progress flag 0x00 check for time out, Non-0x00 skip timeout check
 DosSectorSeek	EQU		$00F8		; Sector currently seeking {SuperDos Rom}
 
 DosAreaStart	EQU		$0600		; Start of RAM used by DOS
+DosErrorCode	EQU		$0603		; Error code from DOS
 DosTimeout	EQU		$0605		; Timeout count, timeout occurs when this location is decremented from 0x01 to 0x00 
 DosHWMaskFF40	EQU		$0606		; Hardware command byte mask for FF40
 DosHWMaskFF48	EQU		$0607		; hardware control mask for $ff48
+DosVerifyFlag	EQU		$0608		; Verify flag, 00=no verify $FF=verify
 DosErrorMask	EQU		$0609		; Error mask, ANDed with error code from WD
 DosDefDriveNo	EQU		$060A		; Default drive number
 DosAutoCurrent	EQU		$060D		; AUTO current line no
 DosAutoInc	EQU		$060F		; AUTO line increment
+DosRunLoadFlag	EQU		$0611		; Run/load flag $00=LOAD
+DosFlFreadFlag	EQU		$0612		; Fread/FLread flag 00=fread, $FF=FLread
 DosAutoFlag	EQU		$0613		; Auto flag, $FF=auto, $00=no auto
 DosErrGotoFlag	EQU		$0614		; ERROR GOTO flag, 0x00 Off Non-0x00 On	
+DosErrDestLine	EQU		$0615		; Error destination line
 DosErrLineNo	EQU		$0617		; ERR line no
 DosErrLast	EQU		$0619		; Last ERR error
 
@@ -84,12 +105,47 @@
 Drv1Details	EQU		$0622		; Drive 1 details (6 bytes)
 Drv2Details	EQU		$0628		; Drive 2 details (6 bytes)
 Drv3Details	EQU		$062E		; Drive 3 details (6 bytes)
+DrvDeatailLen	EQU		$06		; Entries are 6 bytes long
 
+; Offsets into drive details
+DrvDetUseCnt	EQU		$05		; Usage/open file count ?
+
+BuffCount	EQU		$04		; 4 disk buffers
+BuffDetailSize	EQU		$07		; Buffer detail entries ar 7 bytes long
 Buff1Details	EQU		$0634		; Disk buffer 1 details
 Buff2Details	EQU		$063B		; Disk buffer 2 details
 Buff3Details	EQU		$0642		; Disk buffer 3 details
 Buff4Details	EQU		$0649		; Disk buffer 4 details
 
+
+; Disk buffer details offsets for above table
+BuffLSN		EQU		$00		; LSN number 
+BuffFlag	EQU		$02		; Flag, tested for $55 and $FF (also set to $01)
+BuffDrive	EQU		$03		; Drive no 1..4
+BuffAge		EQU		$04		; Age of buffer since last use, 1=oldest..4=youngest
+BuffAddr	EQU		$05		; Buffer address
+
+;BuffFlag values
+
+BuffFree	EQU		$00		; Disk buffer is free
+BuffUnknown	EQU		$01		; Unknown flag set by SuperDosFindAndRead
+BuffInUse	EQU		$55		; Buffer in use
+BuffDirty	EQU		$FF		; Buffer has been modified, but not written to disk
+
+DosCurDriveInfo EQU		$0650		; Dos current drive info
+DosCurExtension	EQU		$0658		; Current extension, used in validation
+DosCurDriveNo	EQU		$065B		; Current drive no
+
+
+DosCurCount	EQU		$0660		; Current count, used in various places
+DosCurLSN	EQU		$066F		; Current LSN, of current DIR sector being processed
+DosCurDirBuff	EQU		$067F		; Pointer to the current Dire sector, Buffer def block
+DosCurFileNo	EQU		$0682		; Current file number on disk, to get dir entry for
+
+
+DosNewUSRTable	EQU		$0683		; New USR table, relocated from low ram
+
+;Drive descriptor table
 DosD0Online	EQU		$0697		; Drive 0 online flag
 DosD1Online	EQU		$0698		; Drive 1 online flag
 DosD2Online	EQU		$0699		; Drive 2 online flag
@@ -101,9 +157,20 @@
 DosD3Track	EQU		$069E		; Drive 3 current track
 
 DosD0StepRate	EQU		$069F		; Drive 0 step rate
-DosD1StepRate	EQU		$0670		; Drive 1 step rate
-DosD2StepRate	EQU		$0671		; Drive 2 step rate
-DosD3StepRate	EQU		$0672		; Drive 3 step rate
+DosD1StepRate	EQU		$06A0		; Drive 1 step rate
+DosD2StepRate	EQU		$06A1		; Drive 2 step rate
+DosD3StepRate	EQU		$06A2		; Drive 3 step rate
+
+DosD0Tracks	EQU		$06A3		; Tracks on disk in drive 0
+DosD1Tracks	EQU		$06A4		; Tracks on disk in drive 1
+DosD2Tracks	EQU		$06A5		; Tracks on disk in drive 2
+DosD3Tracks	EQU		$06A6		; Tracks on disk in drive 3
+
+DosD0SecTrack	EQU		$06A7		; Sectors per track drive 0
+DosD1SecTrack	EQU		$06A8		; Sectors per track drive 1
+DosD2SecTrack	EQU		$06A9		; Sectors per track drive 2
+DosD3SecTrack	EQU		$06AA		; Sectors per track drive 3
+
 
 DosDirSecStatus	EQU		$06AB		; Directory sector status $06ab-$06bc
 
@@ -116,7 +183,10 @@
 DosFCB6Addr	EQU		$0777		; File Control Block 6 Address 
 DosFCB7Addr	EQU		$0796		; File Control Block 7 Address 
 DosFCB8Addr	EQU		$07B5		; File Control Block 8 Address 
-DosFCB9Addr	EQU		$07C4		; File Control Block 9 Address 
+DosFCB9Addr	EQU		$07D4		; File Control Block 9 Address 
+DosFCBEnd	EQU		$07F3		; First byte beyond last FCB
+
+DosDiskBuffBase EQU		$0800		; Base of Disk buffers
 
 DosFCBLength	EQU		$1F		; 31 bytes per FCB
 
@@ -129,7 +199,15 @@
 ; $0B		1	Drive number (1..4)
 ; $0C		3	File pointer
 ; $10		3	File len ?
+;
+; $1D		1	File Number ? (used by DIR).
 
+FCBFileName	EQU	$00	; Filename 
+FCBExtension	EQU	$08	; Extension
+FCBDrive	EQU	$0B	; Drive no
+FCBFilePointer	EQU	$0C	; File Pointer 
+FCBFileLen	EQU	$0F	; File Length
+FCBDiskFileNo	EQU	$1D	; File number on disk, (dir entry no).
 
 ;
 ; Backup command stack frame offsets
@@ -164,6 +242,15 @@
 
 
 ;
+; Sync dir stack frame offsets
+;
+; These are offset from U on stack
+;
+
+SyncDrive	EQU	1	; Drive we are syncing
+SyncSecNo	EQU	3	; Sector we are syncing
+
+;
 ; Dos function codes used by hardware routine.
 ; 
 
@@ -175,3 +262,75 @@
 DosFnWriteTrack	EQU	$05	; Write (format) track
 DosFnReadAddr	EQU	$06	; Read address mark
 DosFnReadSec2	EQU	$07	; Read first two bytes of a sector
+
+*******************************************
+***** Directory Track realted defines *****
+*******************************************
+
+;
+; Dir entry format(s).
+;
+; Dragon/Super dos directory entries can take one of 2 formats, they can be either a
+; filename block, containing filename, attributes & 4 allocation entries, or they can
+; be a continuation block, containing just allocation entries. 
+; This is controled by the byte at offset $18, and the attributes.
+;
+; if AttrContinued = 0 then 
+; 	the byte at offset $18, contains the number of number of bytes in the last sector (256 bytes = 0).
+;
+; if AttrContinued = 0 then 
+; 	the byte at offset $18 controls the format of the entry :
+;		if 0 then 
+;			Entry is a filename entry
+;		else
+;			Entry is a continuation block.
+
+; Filename block format 
+
+DirEntAttr	EQU	$00		; Attributes (see above)
+DirEntFilename	EQU	$01		; Filename, zero padded
+DirEntExtension	EQU	$09		; Extension, zero padded
+DirEntFnBlock1	EQU	$0C		; Allocation block #1
+DirEntFnBlock2	EQU	$0F		; Allocation block #2
+DirEntFnBlock3	EQU	$12		; Allocation block #3
+DirEntFnBlock4	EQU	$15		; Allocation block #4
+DirEntFlag	EQU	$18		; Filename/Continuation flag 0/nonzero
+
+; Continuation block, DirEntAttr, and DirEntFlag, as above.
+
+DirEntCntBlock1	EQU	$01		; Allocation block #1
+DirEntCntBlock2	EQU	$04		; Allocation block #2
+DirEntCntBlock3	EQU	$07		; Allocation block #3
+DirEntCntBlock4	EQU	$0A		; Allocation block #4
+DirEntCntBlock5	EQU	$0D		; Allocation block #5
+DirEntCntBlock6	EQU	$10		; Allocation block #6
+DirEntCntBlock7	EQU	$13		; Allocation block #7
+
+;
+; Allocation block format.
+;
+
+AllocLSN	EQU	$00		; Logical sector number of start of allocation
+AllocCount	EQU	$02		; Count of number of sectors allocated.
+
+;
+; File Attributes
+;
+
+AttrDeleted	EQU	%10000000	; Deleted, may be reused
+AttrContinued	EQU	%00100000	; Continuation entry, byte at $18 giver next entry no
+AttrEndOfDir	EQU	%00001000	; End of directory, no more entries need to be scanned
+AttrWriteProt	EQU	%00000010	; Write protect flag
+AttrIsCont	EQU	%00000001	; This is a continuation entry.
+
+DirEntPerSec	EQU	$0A		; Directory entries per sector
+
+;
+; Sector 0 on Dir track
+;
+
+BitmapPart1	EQU	$00		; Bitmap uses bytes $00..$FB on first sector
+DirTracks	EQU	$FC		; Tracks on disk
+DirSecPerTrk	EQU	$FD		; Sectors/track 18=Single sided, 36=Double sided
+DirTracks1s	EQU	$FE		; complement of DirTracks (used to validate)
+DirSecPerTrk1s	EQU	$FF		; Complement of DirSecPerTrk (used to validate)
\ No newline at end of file