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EMM19_B.ASM
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Assembly Source File
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1989-11-29
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5KB
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94 lines
;-----------------------------------------------------------------------------;
; MODULE NAME: EMM19_B.ASM ;
; ;
; FUNCTION NAME: set_handle_attrib ;
; ;
; DESCRIPTION: This function can be used to modify the attribute which ;
; a handle has associated with it. The attributes which ;
; a handle may have are volatile or non-volatile. ;
; ;
; If the handle's attribute has been set to non-volatile, ;
; the handle, its name (if it is assigned one), and the ;
; contents of the pages allocated to the handle are all ;
; maintained after a warm boot. However, this function ;
; may be disabled with a user option, or may not be ;
; supported by the memory board or system hardware. ;
; ;
; A volatile handle attribute instructs the memory ;
; manager to deallocate both the handle and the pages ;
; allocated to it after a warm boot. If all handles ;
; have the volatile attribute (the default attribute) ;
; at warm boot, the handle directory will be empty and ;
; all of expanded memory will be initialized to zero ;
; immediately after a warm boot. ;
; ;
; PASSED: attrib: ;
; is an open EMM handle's new attribute. A value of ;
; zero indicates that the handle should be made ;
; volatile. A value of one indicates that the handle ;
; should be made non-volatile. ;
; ;
; handle: ;
; is an open EMM handle. ;
; ;
; RETURNED: status: ;
; is the status EMM returns from the call. All other ;
; returned results are valid only if the status ;
; returned is zero. Otherwise they are undefined. ;
; ;
; C USE CONVENTION: unsigned int status; ;
; unsigned int attrib; ;
; unsigned int handle; ;
; ;
; attrib = VOLATILE; ;
; status = set_handle_attrib (attrib, ;
; handle); ;
;-----------------------------------------------------------------------------;
.XLIST
PAGE 60,132
IFDEF SMALL
.MODEL SMALL, C
ENDIF
IFDEF MEDIUM
.MODEL MEDIUM, C
ENDIF
IFDEF LARGE
.MODEL LARGE, C
ENDIF
IFDEF COMPACT
.MODEL COMPACT, C
ENDIF
IFDEF HUGE
.MODEL HUGE, C
ENDIF
INCLUDE emmlib.equ
INCLUDE emmlib.str
INCLUDE emmlib.mac
.LIST
.CODE
set_handle_attrib PROC \
attrib:WORD, \
handle:WORD
;---------------------------------------------------------------------;
; do; ;
; . set the current attribute of the specified handle; ;
;---------------------------------------------------------------------;
MOVE AX, set_handle_attrib_fcn
MOVE DX, handle
MOVE BX, attrib
INT EMM_int
;---------------------------------------------------------------------;
; . return (EMM status); ;
; end; ;
;---------------------------------------------------------------------;
RET_EMM_STAT AH
set_handle_attrib ENDP
END