1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
page 60,132
name _msgret
title C to Message Retriever
;-------------------------------------------------------------------
;
; MODULE: _msgret
;
; PURPOSE: Supplies an interface between C programs and
; the DOS 3.3 message retriever
;
; CALLING FORMAT:
; msgret(&inregs,&outregs);
;
; DATE: 5-21-87
;
;-------------------------------------------------------------------
INCLUDE SYSMSG.INC ;PERMIT SYSTEM MESSAGE HANDLER DEFINITION ;AN000;
MSG_UTILNAME <FILESYS> ;IDENTIFY THE COMPONENT ;AN000;
;-------------------------------------------------------------------
;-------------------------------------------------------------------
_TEXT SEGMENT BYTE PUBLIC 'CODE'
_TEXT ENDS
_DATA SEGMENT WORD PUBLIC 'DATA'
_DATA ENDS
CONST SEGMENT WORD PUBLIC 'CONST'
CONST ENDS
_BSS SEGMENT WORD PUBLIC 'BSS'
_BSS ENDS
DGROUP GROUP CONST, _BSS, _DATA
ASSUME CS: DGROUP, DS: DGROUP, SS: DGROUP, ES: NOTHING
public data_sysloadmsg
public data_sysdispmsg
_DATA SEGMENT
MSG_SERVICES <MSGDATA>
MSG_SERVICES <LOADmsg,FARmsg>
MSG_SERVICES <DISPLAYmsg,CHARmsg,NUMmsg>
MSG_SERVICES <FILESYS.CLA,FILESYS.CL1,FILESYS.CL2,FILESYS.CTL> ;AN000;
data_sysloadmsg proc far
push bp ; save user's base pointer
mov bp,sp ; set bp to current sp
push di ; save some registers
push si
; copy C inregs into proper registers
mov di,[bp+4+4] ; fix di (arg 0)
;-------------------------------------------------------------------
mov ax,[di+0ah] ; load di
push ax ; the di value from inregs is now on stack
mov ax,[di+00] ; get inregs.x.ax
mov bx,[di+02] ; get inregs.x.bx
mov cx,[di+04] ; get inregs.x.cx
mov dx,[di+06] ; get inregs.x.dx
mov si,[di+08] ; get inregs.x.si
pop di ; get inregs.x.di from stack
push bp ; save base pointer
;-------------------------------------------------------------------
call sysloadmsg ; call the message retriever
;-------------------------------------------------------------------
pop bp ; restore base pointer
push di ; the di value from call is now on stack
mov di,[bp+6+4] ; fix di (arg 1)
mov [di+00],ax ; load outregs.x.ax
mov [di+02],bx ; load outregs.x.bx
mov [di+04],cx ; load outregs.x.cx
mov [di+06],dx ; load outregs.x.dx
mov [di+08],si ; load outregs.x.si
lahf ; get flags into ax
mov al,ah ; move into low byte
mov [di+0ch],ax ; load outregs.x.cflag
pop ax ; get di from stack
mov [di+0ah],ax ; load outregs.x.di
;-------------------------------------------------------------------
pop si ; restore registers
pop di
mov sp,bp ; restore sp
pop bp ; restore user's bp
ret
data_sysloadmsg endp
data_sysdispmsg proc far
push bp ; save user's base pointer
mov bp,sp ; set bp to current sp
push di ; save some registers
push si
; copy C inregs into proper registers
mov di,[bp+4+4] ; fix di (arg 0)
;-------------------------------------------------------------------
mov ax,[di+0ah] ; load di
push ax ; the di value from inregs is now on stack
mov ax,[di+00] ; get inregs.x.ax
mov bx,[di+02] ; get inregs.x.bx
mov cx,[di+04] ; get inregs.x.cx
mov dx,[di+06] ; get inregs.x.dx
mov si,[di+08] ; get inregs.x.si
pop di ; get inregs.x.di from stack
push bp ; save base pointer
;-------------------------------------------------------------------
call sysdispmsg
;-------------------------------------------------------------------
pop bp ; restore base pointer
push di ; the di value from call is now on stack
mov di,[bp+6+4] ; fix di (arg 1)
mov [di+00],ax ; load outregs.x.ax
mov [di+02],bx ; load outregs.x.bx
mov [di+04],cx ; load outregs.x.cx
mov [di+06],dx ; load outregs.x.dx
mov [di+08],si ; load outregs.x.si
lahf ; get flags into ax
mov al,ah ; move into low byte
mov [di+0ch],ax ; load outregs.x.cflag
pop ax ; get di from stack
mov [di+0ah],ax ; load outregs.x.di
;-------------------------------------------------------------------
pop si ; restore registers
pop di
mov sp,bp ; restore sp
pop bp ; restore user's bp
ret
data_sysdispmsg endp
include msgdcl.inc
_DATA ends ; end code segment
_TEXT SEGMENT
assume cs:_TEXT
public _sysdispmsg
public _sysloadmsg
_sysdispmsg proc near
call data_sysdispmsg
ret
_sysdispmsg endp
_sysloadmsg proc near
call data_sysloadmsg
ret
_sysloadmsg endp
_TEXT ENDS
end
|
