1 line
26 KiB
Plaintext
1 line
26 KiB
Plaintext
|
;*******************************************************
;
; SCSI Driver 'Main Driver'.
;
; Written by Matt Gulick. Started May 25,1988
;
; Copyright Apple Computer, Inc. 1988,89
;
;*******************************************************
;*******************************************************
;
; This file contains the 'Main Driver' as defined in
; the ERS.
;
;*******************************************************
;*******************************************************
;
; Revision History:
;
;*******************************************************
; May 25, 1988 File started.
; June 6, 1988 Turned sections into subroutines
; and wrote the Main Driver Proper.
; June 20, 1988 Added Register Input and Output.
; Also included the changes from
; the code review.
; Oct 25, 1988 Made changes in code to reflect the
; redesign of the SCSI Manager interface.
;
STRING PASCAL
BLANKS OFF
PAGESIZE 70
PRINT NOGEN
PRINT NOMDIR
MACHINE M65816
IMPORT cmd_t_tbl
IMPORT call_type
IMPORT scratch0
IMPORT cmd_ps_tbl
IMPORT c_len_len
IMPORT c_blk_len
IMPORT divide
IMPORT result
IMPORT divend
IMPORT divsor
IMPORT time_cnt
IMPORT rout2_s_disp
IMPORT gsos_dpage
IMPORT f_partition
IMPORT internal
IMPORT disk_switch
IMPORT scsi_mgrnum
IMPORT manager_cmd
IMPORT cur_cmd
IMPORT cur_cmd2
IMPORT cur_group
IMPORT trans_dest
IMPORT p_block_num
IMPORT killer_blk
IMPORT trans_flag
IMPORT temp_x
IMPORT temp_y
IMPORT timeout_flag
IMPORT auto_sense_data
IMPORT lst_rslt_ec
IMPORT lst_rslt_stat
IMPORT lst_rslt_skey
IMPORT lst_rslt_info
IMPORT lst_rslt_rqlen
IMPORT lst_rslt_scode
PRINT OFF
INCLUDE 'scsihd.equates'
INCLUDE 'M16.MEMORY'
INCLUDE 'M16.UTIL'
PRINT ON
EJECT
;*******************************************************
;
; Main Entry point to the 'Main Driver'.
;
; The function of this code is to take the callers
; command data and build a SCSI Command Packet. This
; is done using the conversion tables in the file
; 'SCSI Command Table'. The command and other data
; is actually built in the space that has been added
; to the DIB and then routed to the SCSI Manager.
;
; The routine is called with the LONG pointer to the
; callers command data in the Direct Page location
; 'scsi_mdrvr'. This, in conjunction with the DIB Ptr
; at direct page location 'dib_ptr' as the address
; for the template overlay, will be used to do the
; following:
;
; Transfer the callers command data to the command
; packet.
; Zero all 12 bytes first.
; Validate Internal Command flag if set.
; .OR. in all values durring translation.
; Adjust Transfer length if needed.
; Convert Block Number from Logical to Actual
; If partition Flag is <20> zero then leave
; block number unmodified.
; Check for command errors.
;
; Stuff SCSI Manager Flags
;
; Stuff data in the TRX buffer data structure
;
; Ship the call out to the SCSI Manager.
;
; Clear Partition Call Flag.
;
; Clear the Internal Command Flag.
;
; Translate any SCSI errors into GS/OS errors.
;
; Inputs: Acc = Unspecified
; Y register = Unspecified
; X register = Unspecified
; P register = 0=M=X=e
; Direct Page = Ours
; Data Bank = Ours
;
; Outputs: Acc = Unspecified
; Y register = Unspecified
; X register = Unspecified
; P register = 0=M=X=e
; Direct Page = Ours
; Data Bank = Ours
;
; Errors: Carry set if Error.
;
;*******************************************************
EXPORT main_drvr
main_drvr PROC
;
; Clear the Timeout flag
;
stz |timeout_flag
;
; Clear the last error stuff
;
stz |lst_rslt_ec
stz |lst_rslt_stat
stz |lst_rslt_skey
stz |lst_rslt_info
stz |lst_rslt_rqlen
stz |lst_rslt_scode
;
; Clear the Command Buffer
|