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|
PAGE 60,132 ;
TITLE DEBEMS.SAL - EMS DEBUGGER COMMANDS PC DOS
;======================= START OF SPECIFICATIONS =========================
;
; MODULE NAME: DEBEMS.SAL
;
; DESCRIPTIVE NAME: DEBUGGING TOOL
;
; FUNCTION: PROVIDES USERS WITH ACCESS TO RUDIMENTARY EMS FACILITIES.
;
; ENTRY POINT: ANY CALLED ROUTINE
;
; INPUT: NA
;
; EXIT NORMAL: NA
;
; EXIT ERROR: NA
;
; INTERNAL REFERENCES:
;
; EXTERNAL REFERENCES:
;
; ROUTINE: DEBCOM2 - CONTAINS ROUTINES CALLED BY DEBUG
; DEBCOM3 - CONTAINS ROUTINES CALLED BY DEBUG
; DEBASM - CONTAINS ROUTINES CALLED BY DEBUG
; DEBUASM - CONTAINS ROUTINES CALLED BY DEBUG
; DEBMES - CONTAINS ROUTINES CALLED BY DEBUG
;
; NOTES: THIS MODULE IS TO BE PREPPED BY SALUT WITH THE "PR" OPTIONS.
; LINK DEBUG+DEBCOM1+DEBCOM2+DEBCOM3+DEBASM+DEBUASM+DEBERR+
; DEBCONST+DEBDATA+DEBMES
;
; REVISION HISTORY:
;
; AN000 VERSION 4.00 - REVISIONS MADE RELATE TO THE FOLLOWING:
;
; - IMPLEMENT EMS FUNCTIONS DSM:6/24/87
;
; COPYRIGHT: "MS DOS DEBUG UTILITY"
; "VERSION 4.00 (C) COPYRIGHT 1988 Microsoft"
; "LICENSED MATERIAL - PROPERTY OF Microsoft "
;
;======================= END OF SPECIFICATIONS ===========================
INCLUDE DOSSYM.INC
include debequ.asm
CODE SEGMENT PUBLIC BYTE
CODE ENDS
CONST SEGMENT PUBLIC BYTE
CONST ENDS
CSTACK SEGMENT STACK
CSTACK ENDS
DATA SEGMENT PUBLIC BYTE
extrn xm_page:byte ;an000;page count to allocate
extrn xm_log:byte ;an000;log. page to map
extrn xm_phy:byte ;an000;phy. page to map
extrn xm_handle:word ;an000;handle to map
extrn xm_handle_ret:word ;an000;handle created
extrn xm_page_cnt:word ;an000;page count
extrn xm_handle_pages_buf:byte ;an000;holds handles and pages
extrn xm_frame:word ;an000;EMS frame value
extrn xm_deall_han:word ;an000;handle to deallocate
extrn xm_alloc_pg:word ;an000;pages allocated
extrn xm_total_pg:word ;an000;total pages possible
extrn xm_han_alloc:word ;an000;handles allocated
extrn xm_han_total:word ;an000;total handles possible
extrn xm_han_ret_ptr:word ;an000;prints handle created
extrn xm_mapped_ptr:word ;an000;prints log/phy pages
extrn xm_page_seg_ptr:word ;an000;Frame seg status
extrn xm_deall_ptr:word ;an000;Handle deallocation
extrn xm_unall_ptr:word ;an000;prints page status
extrn xm_han_alloc_ptr:word ;an000;print handle status
extrn xm_err80_ptr:word ;an000;ems error message
extrn xm_err83_ptr:word ;an000;ems error message
extrn xm_err84_ptr:word ;an000;ems error message
extrn xm_err85_ptr:word ;an000;ems error message
extrn xm_err86_ptr:word ;an000;ems error message
extrn xm_err87_ptr:word ;an000;ems error message
extrn xm_err88_ptr:word ;an000;ems error message
extrn xm_err89_ptr:word ;an000;ems error message
extrn xm_err8a_ptr:word ;an000;ems error message
extrn xm_err8b_ptr:word ;an000;ems error message
extrn xm_err8d_ptr:word ;an000;ems error message
extrn xm_err8e_ptr:word ;an000;ems error message
extrn xm_errff_ptr:word ;an000;ems error message
extrn xm_err_gen_ptr:word ;an000;ems error message
extrn xm_parse_err_ptr:word ;an000;input error message
extrn xm_status_ptr:word ;an000;prints status of EMS
DATA ENDS
DG GROUP CODE,CONST,CSTACK,DATA
CODE SEGMENT PUBLIC BYTE
ASSUME CS:DG,DS:DG,ES:DG,SS:DG
public debems ;an000;entry point
extrn std_printf:near ;an000;message retriever
extrn gethx:near ;an000;ASCII to bin conversion
extrn inbuf:near ;an000;input command line
extrn scanb:near ;an000;scan off blanks
extrn scanp:near ;an000;scan for parm
extrn perr:near ;an000;print ^ error
extrn geteol:near
extrn crlf:near ;an000;prints a cr,lf
IF SYSVER
ENDIF
DEBEMS: ;an000;entry to module
call SCANP ;an000;scan for M or S parm
; $if z ;an000;no parms found
JNZ $$IF1
call XM_PARSE_ERROR ;an000;tell user of error
; $else ;an000;
JMP SHORT $$EN1
$$IF1:
mov al,[si] ;an000;grab parm
cmp al,"M" ;an000;is it MAP?
; $if e ;an000;yes
JNE $$IF3
inc si ;an000;point to next byte
call XM_EMS_MAP ;an000;
; $else ;an000;
JMP SHORT $$EN3
$$IF3:
cmp al,"S" ;an000;is it a status check?
; $if e ;an000;yes
JNE $$IF5
inc si ;an000;point to next byte
call XM_EMS_STATUS ;an000;
; $else ;an000;
JMP SHORT $$EN5
$$IF5:
cmp al,"D" ;an000;Deallocate pages?
; $if e ;an000;yes
JNE $$IF7
inc si ;an000;point to next byte
call XM_EMS_DEALL ;an000;
; $else ;an000;
JMP SHORT $$EN7
$$IF7:
cmp al,"A" ;an000;Allocate pages?
; $if e ;an000;yes
JNE $$IF9
inc si ;an000;point to next byte
call XM_EMS_ALLOC ;an000;
; $else ;an000;
JMP SHORT $$EN9
$$IF9:
call GETEOL ;an000;check out parm
; $endif ;an000;
$$EN9:
; $endif ;an000;
$$EN7:
; $endif ;an000;
$$EN5:
; $endif ;an000;
$$EN3:
; $endif ;an000;
$$EN1:
ret ;an000;return to caller
;=========================================================================
; XM_EMS_ALLOC : This function will provide the user the
; capability to set and change EMS logical and
; physical pages within page frame 0.
;
; Inputs: none
;
; Outputs: EMS page frames set or altered
;
; Date: 6/24/87
;=========================================================================
XM_EMS_ALLOC proc near ;an000;XM functions
call XM_GET_MAN_STATUS ;an000;see if EMS active
; $if nc ;an000;EMS active
JC $$IF16
call XM_PAGE_PROMPT ;an000;get pages to allocate
call XM_GET_HAN_ALLOC ;an000;allocate pages
mov dg:XM_HANDLE_RET,dx ;an000;save handle returned
; $if z ;an000;good return
JNZ $$IF17
pushf ;an000;save our flags
call XM_DISP1 ;an000;tell user results
popf ;an000;restore our flags
; $else ;an000;
JMP SHORT $$EN17
$$IF17:
call XM_ERROR ;an000;print error message
; $endif ;an000;
$$EN17:
; $else ;an000;EMS not active
JMP SHORT $$EN16
$$IF16:
call XM_ERROR ;an000;say why not active
; $endif ;an000;
$$EN16:
ret ;an000;return to caller
XM_EMS_ALLOC endp ;an000;
;=========================================================================
; XM_EMS_MAP : This function will provide the user the
; capability to set and change EMS logical and
; physical pages within page frame 0.
;
; Inputs: none
;
; Outputs: EMS page frames set or altered
;
; Date: 6/24/87
;=========================================================================
XM_EMS_MAP proc near ;an000;XM functions
call XM_GET_MAN_STATUS ;an000;see if EMS active
; $if nc ;an000;EMS active
JC $$IF22
call XM_LOG_PROMPT ;an000;get logical page
call XM_PHY_PROMPT ;an000;get physical page
call XM_HAN_PROMPT ;an000;get handle
call XM_MAP_MEMORY ;an000;map the page
; $if z ;an000;good return
JNZ $$IF23
pushf ;an000;save our flags
call XM_DISP2 ;an000;tell user results
popf ;an000;restore our flags
; $else ;an000;
JMP SHORT $$EN23
$$IF23:
call XM_ERROR ;an000;tell error
; $endif ;an000;
$$EN23:
; $else ;an000;EMS not active
JMP SHORT $$EN22
$$IF22:
call XM_ERROR ;an000;say why not active
; $endif ;an000;
$$EN22:
ret ;an000;return to caller
XM_EMS_MAP endp ;an000;
;=========================================================================
; XM_GET_MAN_STATUS : This routine will determine if EMS is active for
; this session.
;
; Called Procs: none
;
; Inputs: none
;
; Outputs: Z - no error
; NZ - error
; AH - error message number
;
; Date: 6/24/87
;=========================================================================
XM_GET_MAN_STATUS proc near ;an000;see if EMS active
push ds ;an000;save ds - we stomp it
mov ax,00h ;an000;set ax to 0
mov ds,ax ;an000;set ds to 0
cmp ds:word ptr[067h*4+0],0 ;an000;see if int 67h is there
pop ds ;an000;restore ds
; $if e ;an000;EMS not installed
JNE $$IF28
stc ;an000;flag no ems
mov ah,XM_NOT_INST ;an000;signal EMS not installed
; $else ;an000;
JMP SHORT $$EN28
$$IF28:
call XM_INSTALL_CHECK ;an000;see if EMS installed
; $if z ;AN000;IS EMS INSTALLED
JNZ $$IF30
clc ;AN000;EMS INSTALLED - FLAG IT
; $else ;an000;
JMP SHORT $$EN30
$$IF30:
stc ;AN000;FLAG EMS NOT INSTALLED
mov ah,XM_NOT_INST ;an000;signal EMS not installed
; $endif ;an000;
$$EN30:
; $endif ;an000;
$$EN28:
RET ;AN000;RETURN TO CALLER
XM_GET_MAN_STATUS endp ;an000;
;=========================================================================
; XM_PAGE_PROMPT : This routine prompts the user for the number of
; pages to be allocated, if he desires a new handle.
; This routine will determine whether or not the other
; prompt messages will be displayed.
;
; Called Procs: STD_PRINTF
; XM_PARSE
;
; Inputs: none
;
; Outputs: XM_PAGE_FLAG
; XM_PAGE_BUF
; XM_PAGE
;
; Date: 6/24/87
;=========================================================================
XM_PAGE_PROMPT proc near ;an000;prompt user for number
; of pages to allocate
call SCANB ;an000;see if parm entered
; $if nz ;an000;if parm found
JZ $$IF34
mov cx,02 ;an000;bytes to parse
call GETHX ;an000;get hex value
; $if c ;an000;no an error occurred
JNC $$IF35
call PERR ;an000;display ^ error
; $else ;an000;
JMP SHORT $$EN35
$$IF35:
mov dg:XM_PAGE,dl ;an000;save page count
; $endif ;an000;
$$EN35:
; $else ;an000;
JMP SHORT $$EN34
$$IF34:
call PERR ;an000;display ^ error
; $endif ;an000;
$$EN34:
ret ;an000;return to caller
XM_PAGE_PROMPT endp ;an000;
;=========================================================================
; XM_LOG_PROMPT : This routine prompts the user for the number of the
; logical page that is to be mapped in EMS. This
; routine will not be performed if a page count
; was specified.
;
; Called Procs: STD_PRINTF
; XM_PARSE
;
; Inputs: none
;
; Outputs: XM_LOG_BUF
; XM_LOG
;
; Date: 6/24/87
;=========================================================================
XM_LOG_PROMPT proc near ;an000;prompt user for the
; logical page to be
; mapped
call SCANB ;an000;see if parm entered
; $if nz ;an000;parm entered
JZ $$IF40
mov cx,02 ;an000;bytes to parse
call GETHX ;an000;get hex value
; $if c ;an000;no an error occurred
JNC $$IF41
call PERR ;an000;display ^ error
; $else ;an000;
JMP SHORT $$EN41
$$IF41:
mov dg:XM_LOG,dl ;an000;save logical page
; $endif ;an000;
$$EN41:
; $else ;an000;
JMP SHORT $$EN40
$$IF40:
call PERR ;an000;display ^ error
; $endif ;an000;
$$EN40:
ret ;an000;return to caller
XM_LOG_PROMPT endp ;an000;
;=========================================================================
; XM_PHY_PROMPT : This routine prompts the user for the number of the
; physical page that is to be mapped in EMS. This
; routine will not be performed if a page count
; was specified.
;
; Called Procs: STD_PRINTF
; XM_PARSE
;
; Inputs: none
;
; Outputs: XM_PHY_BUF
; XM_PHY
;
; Date: 6/24/87
;=========================================================================
XM_PHY_PROMPT proc near ;an000;prompt user for the
; physical page to be
; mapped
call SCANB ;an000;see if parm entered
; $if nz ;an000;parm found
JZ $$IF46
mov cx,02 ;an000;bytes to parse
call GETHX ;an000;get hex value
; $if c ;an000;no an error occurred
JNC $$IF47
call PERR ;an000;display ^ error
; $else ;an000;
JMP SHORT $$EN47
$$IF47:
mov dg:XM_PHY,dl ;an000;save logical page
; $endif ;an000;
$$EN47:
; $else ;an000;
JMP SHORT $$EN46
$$IF46:
call PERR ;an000;
; $endif ;an000;
$$EN46:
ret ;an000;return to caller
XM_PHY_PROMPT endp ;an000;
;=========================================================================
; XM_HAN_PROMPT : This routine prompts the user for the number of the
; handle that the mapping is to occur on. This
; routine will not be performed if a page count
; was specified.
;
; Called Procs: STD_PRINTF
; XM_PARSE
;
; Inputs: none
;
; Outputs: XM_HAN_BUF
; XM_HAN
;
; Date: 6/24/87
;=========================================================================
XM_HAN_PROMPT proc near ;an000;prompt user for the
; handle to be mapped
call SCANB ;an000;see if parm entered
; $if nz ;an000;prompt found
JZ $$IF52
mov cx,04 ;an000;bytes to parse
call GETHX ;an000;get hex value
; $if c ;an000;no an error occurred
JNC $$IF53
call PERR ;an000;display ^ error
; $else ;an000;
JMP SHORT $$EN53
$$IF53:
mov dg:XM_HANDLE,dx ;an000;save logical page
; $endif ;an000;
$$EN53:
; $else ;an000;
JMP SHORT $$EN52
$$IF52:
call PERR ;an000;display ^ error
; $endif ;an000;
$$EN52:
ret ;an000;return to caller
XM_HAN_PROMPT endp ;an000;
;=========================================================================
; XM_GET_HAN_ALLOC : This routine will get a handle and allocate the
; requested number of pages to that handle.
;
; Called Procs: none
;
; Inputs: XM_PAGE - number of pages to allocate to handle
;
; Outputs: Z - no error
; NZ - error
; DX - handle allocated
;
; Date: 6/24/87
;=========================================================================
XM_GET_HAN_ALLOC proc near ;an000;create handle and alloc.
; requested pages.
push bx ;an000;save regs.
mov ah,EMS_HAN_ALLOC ;an000;function 43h
xor bh,bh ;an000;clear byte
mov bl,dg:XM_PAGE ;an000;number of pages to
; allocate
int 67h ;an000;call EMS
or ah,ah ;an000;was there an error
pop bx ;an000;restore regs.
ret ;an000;return to caller
XM_GET_HAN_ALLOC endp ;an000;
;=========================================================================
; XM_MAP_MEMORY : This routine will map the requested logical page
; to the requested physical page in EMS.
;
; Called Procs: none
;
; Inputs: XM_PHY - physical page to map to
; XM_HAN - logical page to map
;
; Outputs: Z - no error
; NZ - error
; page mapped
;
; Date: 6/24/87
;=========================================================================
XM_MAP_MEMORY proc near ;an000;map a logical page to
; a physical page in
; EMS
push bx ;an000;save regs.
push dx ;an000;
mov ah,EMS_MAP_MEMORY ;an000;function 44h
mov al,dg:XM_PHY ;an000;physical page to map
xor bh,bh ;an000;zero byte
mov bl,dg:XM_LOG ;an000;logical page to map
mov dx,dg:XM_HANDLE ;an000;handle to map page to
int 67h ;an000;call EMS
or ah,ah ;an000;was there an error
pop dx ;an000;restore regs.
pop bx ;an000;
ret ;an000;return to caller
XM_MAP_MEMORY endp ;an000;
;=========================================================================
; XM_DISP1 : This routine displays the current page frame and
; the handle created as a result of the allocate pages.
;
; Called Procs: STD_PRINTF
;
; Inputs: XM_FRAME_SEG - page frame segment
; XM_HANDLE_RET - created handle
; XM_PG_FRAME_PTR - pointer to message
; XM_HAN_RET_PTR - pointer to message
;
; Outputs: "Page Frame Segment : %1",0d,0a
; "Handle Created : %1",0d,0a
;
; Date: 6/24/87
;=========================================================================
XM_DISP1 proc near ;an000;display messages
mov dx,offset dg:XM_HAN_RET_PTR ;an000;"Handle Created : "
call STD_PRINTF ;an000;call message ret.
ret ;an000;return to caller
XM_DISP1 endp ;an000;
;=========================================================================
; XM_DISP2 : This routine displays the logical page mapped and
; the physical page it was mapped to.
;
; Called Procs: STD_PRINTF
;
; Inputs: XM_MAPPED_PTR - pointer to message
; XM_LOG - logical page mapped
; XM_PHY - physical page mapped
;
; Outputs: "Logical page %1 mapped to physical page %2",0d0a
;
; Date: 6/24/87
;=========================================================================
XM_DISP2 proc near ;an000;display messages
mov dx,offset dg:XM_MAPPED_PTR ;an000;"Logical page %1 mapped
; to physical page %2"
call STD_PRINTF ;an000;call message ret.
ret ;an000;return to caller
XM_DISP2 endp ;an000;
;=========================================================================
; XM_ERROR: This routine will determine what error we have by
; querying the result in the AH register. It will then
; report the error to the user through STD_PRINTF
;
; Called Procs: STD_PRINTF
;
; Inputs: AH - error code
;
; Outputs: error message
;
; Date: 6/24/87
;=========================================================================
XM_ERROR proc near ;an000;error message printer
cmp ah,XM_ERR80 ;an000;error message
; $if e ;an000;found message
JNE $$IF58
mov dx,offset dg:XM_ERR80_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF58:
cmp ah,XM_ERR83 ;an000;error message
; $if e ;an000;found message
JNE $$IF60
mov dx,offset dg:XM_ERR83_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF60:
cmp ah,XM_ERR84 ;an000;error message
; $if e ;an000;found message
JNE $$IF62
mov dx,offset dg:XM_ERR84_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF62:
cmp ah,XM_ERR85 ;an000;error message
; $if e ;an000;found message
JNE $$IF64
mov dx,offset dg:XM_ERR85_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF64:
cmp ah,XM_ERR86 ;an000;error message
; $if e ;an000;found message
JNE $$IF66
mov dx,offset dg:XM_ERR86_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF66:
cmp ah,XM_ERR87 ;an000;error message
; $if e ;an000;found message
JNE $$IF68
mov dx,offset dg:XM_ERR87_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF68:
cmp ah,XM_ERR88 ;an000;error message
; $if e ;an000;found message
JNE $$IF70
mov dx,offset dg:XM_ERR88_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF70:
cmp ah,XM_ERR89 ;an000;error message
; $if e ;an000;found message
JNE $$IF72
mov dx,offset dg:XM_ERR89_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF72:
cmp ah,XM_ERR8A ;an000;error message
; $if e ;an000;found message
JNE $$IF74
mov dx,offset dg:XM_ERR8A_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF74:
cmp ah,XM_ERR8B ;an000;error message
; $if e ;an000;found message
JNE $$IF76
mov dx,offset dg:XM_ERR8B_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF76:
cmp ah,XM_ERR8D ;an000;error message
; $if e ;an000;found message
JNE $$IF78
mov dx,offset dg:XM_ERR8D_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF78:
cmp ah,XM_ERR8E ;an000;error message
; $if e ;an000;found message
JNE $$IF80
mov dx,offset dg:XM_ERR8E_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif
$$IF80:
cmp ah,XM_NOT_INST ;an000;EMS not installed
; $if e ;an000;found message
JNE $$IF82
mov dx,offset dg:XM_ERRFF_PTR ;an000;point to message
jmp XM_ERROR_CONT ;an000;print error
; $endif ;an000;
$$IF82:
mov dx,offset dg:XM_ERR_GEN_PTR ;an000;general error message
XM_ERROR_CONT:
call STD_PRINTF ;an000;call message ret.
ret ;an000;return to caller
XM_ERROR endp ;an000;
;=========================================================================
; XM_PARSE_ERROR : This routine will display that an error has occurred
; on the input of the requested data.
;
; Called Procs: STD_PRINTF
;
; Inputs: XM_PARSE_ERR_PTR - error message
;
; Outputs: "Invalid value for parameter",0d,0a
;
; Date: 6/24/87
;=========================================================================
XM_PARSE_ERROR proc near ;an000;input error message
mov dx,offset dg:XM_PARSE_ERR_PTR ;an000;error message
call STD_PRINTF ;an000;call message ret.
ret ;an000;return to caller
XM_PARSE_ERROR endp ;an000;
;=========================================================================
; XM_EMS_STATUS : This function will provide the user with
; a report the the current status of EMS.
;
; Inputs: none
;
; Outputs: EMS page frames set or altered
;
; Date: 6/24/87
;=========================================================================
XM_EMS_STATUS proc near ;an000;XM functions
call XM_GET_MAN_STATUS ;an000;see if EMS active
; $if nc ;an000;EMS active
JC $$IF84
call XM_CURR_STATUS ;an000;current status of EMS
; $else ;an000;EMS not active
JMP SHORT $$EN84
$$IF84:
call XM_ERROR ;an000;say why not active
; $endif ;an000;
$$EN84:
ret ;an000;return to caller
XM_EMS_STATUS endp ;an000;
;=========================================================================
; XM_CURR_STATUS : This routine will display the current status of
; all active EMS handles.
;
; Inputs : none
;
; Outputs : Current status of all active EMS handles
; "Handle %1 has %2 pages allocated"
;
; Physical page with it associated frame segment
; "Physical page %1 = Frame segment %2"
;
; Date: 8/05/86
;=========================================================================
XM_CURR_STATUS proc near ;an000;current EMS status
mov ah,EMS_HANDLE_PAGES ;an000;get handle pages
mov di,offset dg:XM_HANDLE_PAGES_BUF ;an000;point to the buffer
int 67h ;an000;
or ah,ah ;an000;see if an error occurred
; $if z ;an000;no error
JNZ $$IF87
; $do ;an000;do while data in buffer
$$DO88:
cmp bx,0 ;an000;end of buffer?
; $leave e ;an000;yes
JE $$EN88
mov ax,word ptr es:[di] ;an000;page handle
mov dg:XM_HANDLE_RET,ax ;an000;save in var
mov ax,word ptr es:[di+02];an000;page count
mov dg:XM_PAGE_CNT,ax ;an000;save in var
mov dx,offset dg:XM_STATUS_PTR ;an000;point to message
call STD_PRINTF ;an000;print it
add di,04h ;an000;next record
dec bx ;an000;decrement counter
; $enddo ;an000;
JMP SHORT $$DO88
$$EN88:
call CRLF ;an000;place a blank line
; between reports
call XM_FRAME_BUFFER ;an000;get frame buffer
;ES:DI points to frame buffer
; $do ;an000;while cx not = 0
$$DO91:
cmp cx,00 ;an000;at end?
; $leave e ;an000;yes
JE $$EN91
call XM_GET_FRAME_SEG ;an000;obtain page and seg
mov dx,offset dg:XM_PAGE_SEG_PTR ;an000;message
call STD_PRINTF ;an000;print it
dec cx ;an000;decrease counter
add di,04 ;an000;adjust pointer
; $enddo ;an000;
JMP SHORT $$DO91
$$EN91:
call XM_UNALL_COUNT ;an000;display page status
call XM_HANDLE_COUNT ;an000;display handle status
; $else
JMP SHORT $$EN87
$$IF87:
call XM_ERROR ;an000;display the error
; $endif ;an000;
$$EN87:
ret ;an000;
XM_CURR_STATUS endp ;an000;
;=========================================================================
; XM_UNALL_COUNT : This routine generates a line of the status report
; displaying the number of pages allocated out of
; the total possible
;
; Inputs : none
;
; Outputs : Current status of allocated pages
; "%1 of a total %2 EMS pages have been allocated"
;
; Date: 8/05/86
;=========================================================================
XM_UNALL_COUNT proc near ;an000;
mov ah,EMS_UNALL_PG_CNT ;an000;see how many pages
; remaining
int 67h ;an000;
or ah,ah ;an000;see if error
; $if z ;an000;no error
JNZ $$IF96
push bx ;an000;save bx
push dx ;an000;save dx
call CRLF ;an000;
pop dx ;an000;restore dx
pop bx ;an000;restore bx
mov ax,dx ;an000;total page count
sub ax,bx ;an000;get pages allocated
mov dg:XM_ALLOC_PG,ax ;an000;save allocated pages
mov dg:XM_TOTAL_PG,dx ;an000;save total page count
mov dx,offset dg:XM_UNALL_PTR ;an000;"%1 of a total %2 EMS
; pages have been allocated",cr,lf
call STD_PRINTF ;an000;print it
; $endif ;an000;
$$IF96:
ret ;an000;
XM_UNALL_COUNT endp ;an000;
;=========================================================================
; XM_HANDLE_COUNT: This routine generates a line of the status report
; displaying the number of handles allocated out of
; the total possible.
;
; Inputs : none
;
; Outputs : Current status of allocated pages
; "%1 of a total %2 EMS handles have been allocated"
;
; Date: 8/05/86
;=========================================================================
XM_HANDLE_COUNT proc near ;an000;
mov ah,EMS_HANDLE_CNT ;an000;see how many handles
; possible
int 67h ;an000;
or ah,ah ;an000;see if error
; $if z ;an000;no error
JNZ $$IF98
mov ax,EMS_HANDLE_TOTAL ;an000;total possible handles
mov dg:XM_HAN_TOTAL,ax ;an000;save total page count
mov dg:XM_HAN_ALLOC,bx ;an000;save allocated pages
mov dx,offset dg:XM_HAN_ALLOC_PTR
;an000;"%1 of a total %2 EMS
; handles have been allocated",cr,lf
call STD_PRINTF ;an000;print it
; $endif ;an000;
$$IF98:
ret ;an000;
XM_HANDLE_COUNT endp ;an000;
;=========================================================================
; XM_FRAME_SEG : This routine accesses the vector created by
; function 58h, int 67h. It obtains a physical
; page of EMS and its segment from this vector
;
; Inputs : ES:DI - points to frame buffer
;
; Outputs : XM_PHY - a physical page in EMS
; XM_FRAME - segment corresponding to the physical page
;
; Date: 8/05/86
;=========================================================================
XM_GET_FRAME_SEG proc near ;an000;find the frame segment
mov al,byte ptr es:[di+2] ;an000;get physical page
mov dg:XM_PHY,al ;an000;place in print var
mov ax,word ptr es:[di] ;an000;get frame segment
mov dg:XM_FRAME,ax ;an000;place in print var
ret ;an000;
XM_GET_FRAME_SEG endp ;an000;
;=========================================================================
; XM_INSTALL_CHECK: This routine performs function 51h, int 67h to
; determine if EMS is indeed active.
;
; Inputs : XM_FRAME_BUFFER - used to receive physical page
; and segment data for EMS.
;
; Outputs : XM_FRAME_BUFFER - buffer holds physical page
; and segment data for EMS.
;
; Date: 8/05/86
;=========================================================================
XM_INSTALL_CHECK proc near ;an000;see if EMS installed
MOV AH,EMS_GET_MAN_STAT ;AN000;GET EMS STATUS
XOR AL,AL ;an000;clear low byte
INT 67h ;an000;
OR AH,AH ;an000;check for error
; $IF Z ;an000;no error
JNZ $$IF100
MOV AH,EMS_VERSION ;an000;get version number
INT 67h ;an000;
CMP AL,EMS_LIM_40 ;an000;LIM 4.0 ?
; $IF AE ;an000;4.0 or greater
JNAE $$IF101
MOV AH,00h ;an000;set up for flag pass
OR AH,AH ;an000;set flag to ZR
; $ELSE ;an000;below 4.0
JMP SHORT $$EN101
$$IF101:
MOV AH,01h ;an000;set up for flag pass
OR AH,AH ;an000;set flag to NZ
; $ENDIF ;an000;
$$EN101:
; $ENDIF ;an000;
$$IF100:
ret ;an000;
XM_INSTALL_CHECK endp ;an000;
;=========================================================================
; XM_EMS_DEALL : This routine deallocates handles from EMS.
;
; Inputs : DX - Handle supplied by XM_DEALL_PROMPT
;
; Outputs : Good return - "Handle %1 deallocated"
; Bad return - message describing error
;
; Date: 8/05/86
;=========================================================================
XM_EMS_DEALL proc near ;an000;deallocate EMS pages
call XM_GET_MAN_STATUS ;an000;see if EMS installed
; $if nc ;an000;error?
JC $$IF105
call XM_DEALL_PROMPT ;an000;prompt user for handle
mov ah,EMS_PAGE_DEALL ;an000;function 45h, int 67h
int 67h ;an000;
or ah,ah ;an000;error?
; $if nz ;an000;yes
JZ $$IF106
call XM_ERROR ;an000;say why
; $else ;an000;
JMP SHORT $$EN106
$$IF106:
mov dx,offset dg:XM_DEALL_PTR;an000;"Handle %1 deallocated"
call STD_PRINTF ;an000;print message
; $endif ;an000;
$$EN106:
; $else ;an000;
JMP SHORT $$EN105
$$IF105:
call XM_ERROR ;an000;print type of error
; $endif ;an000;
$$EN105:
ret ;an000;
XM_EMS_DEALL endp ;an000;
;=========================================================================
; XM_DEALL_PROMPT : This routine prompts the user for the handle to be
; deallocated. It converts the handle entered to
; binary and passes it back to the caller in DX.
;
; Inputs : none
;
; Outputs : DX - Handle to be deallocated.
;
; Date: 8/05/86
;=========================================================================
XM_DEALL_PROMPT proc near ;an000;prompt user for handle
; to deallocate
call SCANB ;an000;see if parm entered
; $if nz ;an000;parm found
JZ $$IF111
mov cx,04 ;an000;bytes to parse
call GETHX ;an000;get hex value
; $if c ;an000;no an error occurred
JNC $$IF112
call PERR ;an000;display ^ error
; $else ;an000;
JMP SHORT $$EN112
$$IF112:
mov dg:XM_DEALL_HAN,dx ;an000;save handle to deallocate
; $endif ;an000;
$$EN112:
; $else ;an000;
JMP SHORT $$EN111
$$IF111:
call PERR ;an000;display ^ error
; $endif ;an000;
$$EN111:
ret ;an000;return to caller
XM_DEALL_PROMPT endp ;an000;
;=========================================================================
; XM_FRAME_BUFFER : This routine obtains the frame buffer
; of EMS pages.
;
; Inputs : none
;
; Outputs : ES:DI - Pointer to frame array
; CX - Number of elements in array
;=========================================================================
XM_FRAME_BUFFER proc near ;an000;
mov ax,EMS_PG_FRAME ;an000;get frame buffer
int 67h ;an000;
ret ;an000;
XM_FRAME_BUFFER endp ;an000;
CODE ENDS
END DEBEMS
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