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0ba83392d4
Resource forks are included only for .rsrc files. These are DeRezzed into their data fork. 'ckid' resources, from the Projector VCS, are not included. The Tools directory, containing mostly junk, is also excluded.
284 lines
9.0 KiB
Plaintext
284 lines
9.0 KiB
Plaintext
;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
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;
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; File: LateLoad.a
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;
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; Contains: LateLoad
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;
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; This LinkedPatch is responsible for mounting slow
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; SCSI drives on TERROR machines. Because TERROR waits for the default
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; Startup Drive instead of the "internal" drive, unlike older ROMs, LateLoad is
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; needed to make sure that the internal drive (or drives on Eclipse or similar)
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; are spun up. This is done at LP time instead of at boot time because by then,
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; most drives will have spun up already and we won't have to wait at all.
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;
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;
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; Written by: Paul Wolf
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;
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; Copyright: © 1991-1992 by Apple Computer, Inc., All rights reserved.
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;
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; Change History (most recent first):
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;
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; <SM2> 2/1/93 PN Adding LateLoad from Reality and also moved LateLoad.a into
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; SCSIMgr folder
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; <1> 10/24/91 SAM Rolled in Regatta file.
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;
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; Regatta Change History:
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;
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; <3> 8/29/91 SAM (pdw) Added exception for portables. They will no longer wait
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; for any drives other than the "internal" drive.
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; <2> 8/21/91 SAM (pdw) Changed location of drive 0 bit in PRAM from bit 0 of byte
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; 3 to bit 6 of byte 8A.
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; <1> 7/30/91 SAM first checked in
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; <0> 6/20/91 PDW Created.
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;
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; To Do:
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;__________________________________________________________________________________________________
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BLANKS ON ; assembler accepts spaces & tabs in operand field
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STRING ASIS ; generate string as specified
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PRINT OFF ; do not send subsequent lines to the listing file
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; don't print includes
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LOAD 'StandardEqu.d' ; from StandardEqu.a and for building ROMs
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INCLUDE 'HardwarePrivateEqu.a'
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INCLUDE 'UniversalEqu.a' ; for VIA bit and -TestFor- definitions
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INCLUDE 'FSEqu.a' ; for VCB and DrvQ stuff
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INCLUDE 'SCSIEqu.a' ; for SCSIDrvrs
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INCLUDE 'LinkedPatchMacros.a'
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PRINT ON ; do send subsequent lines to the listing files
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; CASE OBJECT ; use case as specified in source text, C
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; Note ¥¥¥¥
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; This file is moved over to scsiLateLoad.a in SCSIMgr folder in SuperMario ROM
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; ******************************************************************************
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;---------------------------------------------------------------------
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MACRO
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_WaitForSCSIDevs
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exg.l D0, A0
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moveq #10,D0 ; WaitForSCSIDevs selector
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_HWPriv
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exg.l D0, A0
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ENDM
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;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
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; LateLoad
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;
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;
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;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
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LateLoad InstallProc (IIci,hasTERROR) ; TERROR machines only!
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;--- Get the stored list of drives to wait for
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bsr.s GetOldDriveList ; D1.b = list of drives to wait for
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;--- First, try just searching for these devices once, to see if they're there
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move.w D1, D0 ; search for these devices
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swap D0
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move.w #0, D0 ; wait for no devices
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_WaitForSCSIDevs
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;--- If they are already mounted, don't do any more scans
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move.b SCSIDrvrs, D0
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and.b D1, D0 ; only test for those devices were interested in
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cmp.b D1, D0 ; do we have them?
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beq.s @gotThem ; yes - update stored drive list
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;--- If they didn't get mounted by now, wait for them while scanning all SCSI IDs
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move.w #$FF, D0 ; now search for all devices
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swap D0
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move.w D1, D0 ; and wait for the stored list of devices
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_WaitForSCSIDevs
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@gotThem
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;--- Determine which SCSI IDs have drives that we want to remember about
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bsr GetNewDriveList ; D1.w=list
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;--- Update the stored drive list with the new configuration
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bsr.s PutNewDriveList ; write changed drive list out to resource if needed
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@end
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rts
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;---------------------------------------------------------------------
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;
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; Read the old drive list from PRAM.
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;
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; D1.b <-- drive list
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;
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;---------------------------------------------------------------------
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DrvZeroBit EQU 6 ; Bit 6 in MMFlags PRAM byte 8A (for ID 0) <2>
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GetOldDriveList
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;--- Look at parameter RAM (1 byte at offset $89) for drives 1-6
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moveq.l #0, D1
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lea -2(SP),SP ; make read area for _ReadXPram
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move.l sp,A0 ; place to read
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move.l #$00010089, d0 ; one byte, location 89 (Bits 2-7)
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_ReadXPRam ; trashes D0, puts byte in (a0)
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move.b (sp)+,D1 ; "pop" the return value
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lsr.b #2,D1 ; move the upper 6 bits right two places
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lsl.b #1,D1 ; shift them all left 1 leaving a zero in bit 0
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bsr.s GetDriveZeroBit
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beq.s @exit
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bset #0, D1
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@exit
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rts
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;---------------------------------------------------------------------
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;
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; Put the new drive list wherever (how about a resource, no make it
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; PRAM, no a resource, no ...).
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;
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; D1.b --> drive list
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;
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;---------------------------------------------------------------------
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PutNewDriveList
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;--- Update the "is SCSI ID 0 spinning" PRAM byte ---
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bsr.s GetDriveZeroByte ; returns byte in D2 <2> thru next <2>
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btst #0, D1 ; is drive 0 spun up?
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beq.s @disableZero ; -> Nope, clear bit zero
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@enableZero
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bset #DrvZeroBit, D2 ; yes, wait for it next time too
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bra.s @1
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@disableZero
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bclr #DrvZeroBit, D2 ; no, don't wait for it next time
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@1
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bsr.s PutDriveZeroByte ; accepts byte in D2 <2> from last <2>
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;--- Update the bitmap of SCSI ids 1-6 in PRAM ---
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lea -2(SP),SP ; make read area for _ReadXPram
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move.l SP,A0 ; place to read
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move.l #$00010089,D0 ; one byte, location 89 (Bits 2-7)
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_ReadXPRam ; trashes D0, puts byte in (a0)
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move.b (SP)+,D0 ; "pop" the return value
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and.b #%11111110,D1 ; Mask out drive zero's bit (bit zero) from the drive mask
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lsl.b #1,D1 ; Shift the 6 bits left 1
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and.b #%00000011,D0 ; Mask out the serial bits from the PRAM byte $89
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or.b D0,D1 ; Add our 6 bits to the 2 bits already there
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move.b D1, -(SP) ; push new value on stack
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move.l SP, A0 ; address of new PRAM value
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move.l #$00010089, D0 ; write 1 bytes of PRAM to offset 3
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_WriteXPRam ; save the IDs in parameter RAM
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move.b (SP)+, D1
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rts
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;--------------------------------------------------------------------- <2> thru next <2>
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GetDriveZeroBit
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GetDriveZeroByte
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;---------------------------------------------------------------------
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;--- Look at parameter RAM (1 byte at offset 8a) for drive 0
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lea -2(sp), sp ; make space for PRAM SCSI id
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move.l sp, A0 ; address of PRAM return buffer
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move.l #$0001008A,D0 ; read 1 byte of PRAM at offset 8a
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_ReadXPRam ; get the byte
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move.b (sp)+, D2 ;
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btst #DrvZeroBit, D2 ; return Z flag according to drive 0 bit
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rts
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;---------------------------------------------------------------------
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PutDriveZeroByte
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;---------------------------------------------------------------------
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;--- Modify parameter RAM (1 byte at offset 8a) for drive 0
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move.b D2, -(SP) ; push new value on stack
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move.l SP, A0 ; address of new PRAM value
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move.l #$0001008A, D0 ; write 1 byte of PRAM to offset 8a
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_WriteXPRam ; save the IDs in parameter RAM
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move.w (SP)+, D2
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rts ; <2> from last <2>
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;---------------------------------------------------------------------
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GetNewDriveList
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;---------------------------------------------------------------------
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; WITH scsiGlobalRecord
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bsr.s FindFixedDrives ; Find all SCSI ID's with fixed drives in DrvQ
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;--- if we are on a portable then strip all bits except for internal drive's <3> to next <3>
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TestFor hwCbPwrMgr
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beq.s @exit
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; Look at parameter RAM (byte at offset 3) for internal drive's SCSI id
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subq.l #2, sp ; make space for PRAM SCSI id
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move.l sp, A0 ; address of PRAM return buffer
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move.l #$00010003, D0 ; read 1 byte of PRAM at offset 3 (internal drive)
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_ReadXPRam ; get the SCSI id
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move.b (sp), D0 ; check high bits for validity
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and.b #$78, D0 ; mask upper bits
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cmp.b #$48, D0 ; equal to magic pattern?
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beq.s @continue ; <2> if so, go do the real stuff
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addq.w #2, sp ; <2> remove the answer from the stack
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bra.s @exit ; <2> and just bail
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@continue
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move.b (sp)+, D0 ; check high bits for validity
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and.w #$07, D0 ; mask lower 3 bits
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moveq.l #0, D3
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bset D0, D3 ; set only internal drive's bit in mask
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and.b D3, D1 ; clear all but that drive's bit
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@exit ; <3> from last <3>
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rts
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; ENDWITH
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;---------------------------------------------------------------------
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FindFixedDrives
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;---------------------------------------------------------------------
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move.b #0, D1 ; we start with no fixed disks
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move.l DrvQHdr+qHead, A0 ; point to DrvQHdr (which points to 1st Qel)
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@loop
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move.b -3(A0), D0 ; is it fixed?
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and.b #$0f, D0
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cmp.b #$08, D0
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bne.s @next
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move.w dqRefNum(A0), D0
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not.w D0
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sub.w #$20, D0
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blt.s @next ; not a SCSI driver
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cmp.b #$7, D0
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bgt.s @next
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bset.l D0, D1 ; set the bit for this drive(r)
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@next
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move.l qLink(A0), A0 ; is this the end of the linked list?
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move.l A0, D3 ; (test for zero link)
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bne.s @loop
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@exit
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rts
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ENDP
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END.
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