pcmode.equ

一个dos操作系统DRDOS的源码

;    File              : $PCMODE.EQU$
;
;    Description       :
;
;    Original Author   : DIGITAL RESEARCH
;
;    Last Edited By    : $CALDERA$
;
;-----------------------------------------------------------------------;
;    Copyright Work of Caldera, Inc. All Rights Reserved.
;      
;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
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;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
;    CIVIL LIABILITY.
;-----------------------------------------------------------------------;
;
;    *** Current Edit History ***
;    *** End of Current Edit History ***
;
;    $Log$
;
;    ENDLOG
;	This file contains all the general purpose definitions
;	and equates used by the PCMODE Module.
;

TRUE	   	equ	0FFFFh		; value of TRUE
FALSE	   	equ	0		; value of FALSE

TRUE_VERSION	equ	6

IDLE_DETECT	equ	TRUE		; Check for IDLE Process's

if IDLE_DETECT
IDLE_COMMAND	equ	0001h		; Command Processor Active
IDLE_DOSFUNC	equ	0002h		; DOS Function Called
IDLE_INT28	equ	0004h		; INT 28 Called

IDLE_ON		equ	4000h		; ReSet when Idle Checking Enabled
IDLE_INIT	equ	8000h		; ReSet when $IDLE$ Loaded and Active
IDLE_DISABLE	equ	IDLE_INIT + IDLE_ON 

PROC_IDLE	equ	0001		; Process is IDLE
PROC_INT28	equ	0002		; INT28 Polling Loop
PROC_KEYIN	equ	0003		; Keyboard Input
PROC_DEVIN	equ	0004		; Device Input Routine
endif


STACK_SIZE	equ	192		; Local Stack Size (Levels)
MAX_PATHLEN	equ	80		; Maximum Path length
MAX_FILELEN	equ	13

;
;	DOS process termination Codes
;
TERM_NORMAL	equ	0		; Normal Termination
TERM_BREAK	equ	1		; Termination by Control Break
TERM_ERROR	equ	2		; Termination by Critical Error
TERM_RESIDENT	equ	3		; Terminate and Stay Resident

;
;	Critical Error responses from the default INT 24 handler and
;	the DO_INT24 routine.
;
ERR_IGNORE	equ	0		; Ignore Error
ERR_RETRY	equ	1		; Retry the Operation
ERR_ABORT	equ	2		; Terminate the Process
ERR_FAIL	equ	3		; Fail Function
;
OK_FAIL		equ	0000$1000b	; Fail is a Valid Response
OK_RETRY	equ	0001$0000b	; Retry is a Valid Response
OK_IGNORE	equ	0010$0000b	; Ignore is a valid Response
OK_RIF		equ	0011$1000b	; All Responsese are Valid
OK_RI		equ	0011$0000b	; Retry and Ignore are Valid
OK_RF		equ	0001$1000b	; Retry and Fail are Valid
;
NO_CRIT_ERRORS	equ	0100$0000b	; critical error shouldn't be generated
					; warning - must match FDOS.A86
;
eject
;	The following equates define the format in which the users registers
;	are saved on the stack. This format is also seen by an application
;	when a critical error occurs.
;
CodeMacro	POP$DOS		; Pop User Registers a la MS-DOS
	db 058h ! db 05Bh	; pop AX ! pop BX
	db 059h ! db 05Ah	; pop BX ! pop CX
	db 05Eh ! db 05Fh	; pop SI ! pop DI
	db 05Dh			; pop BP
	db 01Fh ! db 007h	; pop DS ! pop ES
EndM

CodeMacro   PUSH$DOS    ; Push User Registers
	db 006h ! db 01Eh	; push ES ! push DS
	db 055h			; push BP
	db 057h ! db 056h	; push DI ! push SI
	db 052h ! db 051h	; push DX ! push CX
	db 053h ! db 050h	; push BX ! push AX
EndM

reg_AX		equ	word ptr .00
reg_AL		equ	byte ptr .00
reg_AH		equ	byte ptr .01

reg_BX		equ	word ptr .02
reg_BL		equ	byte ptr .02
reg_BH		equ	byte ptr .03

reg_CX		equ	word ptr .04
reg_CL		equ	byte ptr .04
reg_CH		equ	byte ptr .05

reg_DX		equ	word ptr .06
reg_DL		equ	byte ptr .06
reg_DH		equ	byte ptr .07

reg_SI		equ	word ptr .08
reg_DI		equ	word ptr .10
reg_BP		equ	word ptr .12

reg_DS		equ	word ptr .14
reg_ES		equ	word ptr .16

reg_IP		equ	word ptr .18
reg_CS		equ	word ptr .20
reg_FLAGS	equ	word ptr .22

; Processor Flags
CARRY_FLAG	equ	0001h		; Carry Flag
ZERO_FLAG	equ	0040h		; Zero Flag
SIGN_FLAG	equ	0080h		; Sign Flag
INT_FLAG	equ	0200h		; Interrupt Flag
DIR_FLAG	equ	0400h		; Direction Flag
OFLW_FLAG	equ	0800h		; OverFlow Flag

DMD_ID          equ     es:byte ptr .0	; id code ('M' or 'Z')
DMD_PSP         equ     es:word ptr .1	; owner of memory block
DMD_LEN         equ     es:word ptr .3	; length of memory block
DMD_IDLE_FLAGS  equ es:word ptr .6  ; idle flags live here
DMD_NAME	equ	es:byte ptr .8	; ASCIIZ name field
DMD_NAME_LEN	equ	8		;  8 Bytes long
IDM             equ     'M'		; not last id code
IDZ             equ     'Z'		; last id code

PCMCODE		GROUP	PCM_HEADER, PCM_CODE, BDOS_CODE, PCM_RODATA
PCMCODE		GROUP	PCM_HISTORY, PCM_ICODE, PCM_CODEND

PCM_HEADER	CSEG	PARA
PCM_CODE	CSEG	BYTE
PCM_RODATA	CSEG	WORD
BDOS_CODE	CSEG	WORD
PCM_HISTORY	CSEG	BYTE
PCM_ICODE	CSEG	BYTE
PCM_CODEND	CSEG	PARA


PCMDATA		GROUP	PCMODE_DATA, FDOS_DSEG, FIXED_DOS_DATA
PCMDATA		GROUP	PCMODE_CODE, GLOBAL_DATA, BDOS_DATA, PCMODE_DSIZE

PCMODE_DATA	DSEG	WORD		; DOS Data
FDOS_DSEG	DSEG	WORD COMMON	; FDOS Parameter Block	
fdos_data	rw	7
FIXED_DOS_DATA	CSEG	WORD	'DATA'	; Fixed DOS Data Area
PCMODE_CODE	CSEG	WORD	'DATA'	; DATA relative CODE
GLOBAL_DATA	DSEG	WORD		; GLOBAL DOS DATA (Process Independant)
BDOS_DATA	DSEG	WORD		; BDOS Data Area
PCMODE_DSIZE	DSEG	PARA		; End of DOS Data Area