IBM XT 5160 - Page 228

; - --- -- - - - -- -- - -- -- - -- -- --- -- - ---- - -- ------- - ----
I NTERRUPT COMPLETE -------------------------
:
TH I S ROUT I NE I S A TEMPORARY HANDLER :
FOR I NTERRUPT COMPLETE :
:
INPUT - SEE PROLOGUE :
--- INT 15 H -- ( FUNCTION 88 H - I/O MEMORY SIZE DETERMINE) -----------------
EXT MEMORY :
- THIS ROUTINE RETURNS THE AMOUNT OF MEMORY IN THE SYSTEM THAT IS :
LOCATED STARTING AT THE 1024K ADDRESSING RANGE, AS DETERMINED BY :
THE POST ROUTI NES. :
INPUT :
AH = 88H :
:
OUTPUT :
(AX) = 0 :
:
5-81
; SET EXTENDED MEMORY SIZE TO ZERO
; RETURN TO USER
FUNCT I ON ( COH)
GET CODE SEGMENT
PLACE I N SELECTOR PO INTER
; GET OFFSET OF PARAMETER TABLE
; CLEAR AH AND SET CARRY OFF
; EX I T THROUGH COMMON RETURN
; RETURN
TURN CARRY
OFF
RETURN WITH (AH= 00) AND CY=O
CHECK FOR
FUNCT I ON ( 9 I H)
GO TO I NTERRUPT COMPLETE RETURN
EXIT IF NOT A VALID FUNCTION
; NULL HANDLERS
BASE ON 0
DEVICE OPEN
(80H)
; DEV I CE CLOSE
(8IH)
PROGRAM TERM I NAT I ON
(82H)
I GNORE EVENT WA I T
(83H)
; JOYSTICK BIOS
(84H)
SYSTEM REQUEST KEY
(85H)
IGNORE WAIT
(86H)
I GNORE BLOCK MOVE
(87H)
; EXTENDED MEMORY SIZE
(88H)
; CHECK FOR FUNCT I ON
(90H)
BIOS1 (01/10/86)
1-2
01-10-86
NEAR
AX,AX
ENDP
PROC
ENDP
PROC NEAR
CS
ES
BX, OFFSET CONF TBL
AH,AH -
CI F
ENDP
AH,8
DEVICE BUSY
AH -
I
NT COMPLETE
CI -
XOR
IRET
EXT_MEMORY
EXT_MEMORY
PROC
I
NT COMPLETE
-
IRET
I NT_COMPLETE
CONF PARMS
- PUSH
POP
MOV
XOR
JMP
CONF_PARMS
SUB
AH,080H
JZ DEV OPEN
DEC
AH -
JZ DEV CLOSE
DEC AH -
JZ PROG TERM
DEC AH-
DEC AH
JZ JOY STICK
DEC AH -
JZ SYS REQ
DEC AH -
DEC AH
DEC
AH
JZ EXT_MEMORY
SUB
JZ
DEC
JZ
JMP
DEV OPEN:
DEV-CLOSE:
PROG TERM:
SYS REQ:
DEVTcE BUSY:
- CLC
JMP
115 00 I I 80 EC 80
I 16 00 I 4 74 25
117 0016 FE CC
118 0018 74 21
I I 9 00 I A FE CC
120 OOIC 74 10
I 2 I 00 I E FE CC
122 0020 FE CC
123 0022 74 27
124 0024 FE CC
125 0026 74 13
126 0028 FE CC
127 002A FE CC
128 002C FE CC
129 002E 74 18
130
131 0030 80 EC 08
132 0033 74 06
133 0035 FE CC
134 0037 74 05
135 0039 EB CB
136
137 003B
138 003B
139 003B
140 003B
141 003B
142 003B F8
143 003C EB CB
144
145 003E
146
147
148
149
150
151
152
153
154
155 003E
156 003E CF
157 003F
158
159 003F
160 003F OE
161 0040 07
162 0041 BB 0000 E
163 0044 32 E4
164 0046 EB CI
165 0048
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
0048
181
182 0048 33 CO
183
184 004A CF
185
186
004B
IBM Persona I Computer MACRO Assemb I er Vers i on 2.00
BIOSI ---- 01/10/86 INTERRUPT 15H BIOS ROUTINES