IBM 5150 Technical Reference

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0010 ???1
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0015 ?11?
0017 ??
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QOlA 11?1
ODIC ????
ODIE (16
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0010
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7.
ow
4 DUPI!)
I ADDRESSES OF RS232 ADAPTeRS
7.
4 DUP(?I
I
ADDRESSES OF PRINTERS
.0 OW I INSTAlLED HARDWARE
e1
DB
I INITIALIZATION FLAG
e2 MEMORY_SIZE
OW
; MEMORY SIZE IN K BYTES
e,
IO.RAN.SIZE
OW
I MEMORY IN I/O CHANNEL
84 ; - - --------------------------------------
85 KEYBOARD DATA AREAS
86 ; - ---------------------------------------
e7
KBJLAG DB
ee
89 ;----- SHIFT FLAG EQUATES WITHIN K8.FlAG
.,
n INS_STATE EQU
.OH
I INSERT STATE IS ACTIVE
CAPS_STATE EQU 40H
I C.6.PS LOCK STATE HAS BEEN TOGGLED
.,
NUM_STA.TE EQU
,OH ; HUH LOCK STATE HAS BEEN TOGGLED
94
SCROll..STATE EQU
10H
I SCROLL LOCK STATE HAS BEEN TOGGLED
'5
ALT_SHIFT EQU
oeH I ALTERNATE SHIFT KEY DEPRESSED
..
.. CTl_SHIFT EQU
'4H
I COKTROL SHIFT KEY DEPRESSED
.7 LEFT_SHIFT EQU O2H
I lEft SHIFT KEY DEPRESSED
RIGHT_SHIFT EQU OlH
I RIGHT SHIft KEY DEPRESSED
100 DB
I SECON] BYTE Of KEYBOARD STArus
101
10. INS_SHIFT EQU
e'H
I INSERT KEY IS DEPRESSED
10'
CAPS_SHIFT EQU
4'H
I CAPS lOCK KEY IS DEPRESSED
10. NUt,-SHIFT EQU 20H I HUt lOCK KEY IS DEPRESSED
105
SCROLI..-SHIFT EQU lOH
; SCrfOll LOCK KEY IS DEPRESSED
106 HOLD_STATE EQU ,eH I SUSPEND KEY HAS BEEN TOGGLED
107
lOe ALT_INPUT
DB
; STORAGE FOR ALTERNATE KEYPAD EKTRY
10'
BUFFER_HEAD
OW
I POINTER TO HEAD OF KEYBOARD BUFfER
"'
BUFFER_TAll
OW
I POINTER TO TAIL OF KEYBOARD BUFFER
111 KB_BUFFER
OW
16 DUPI?J
I ROOM FOR 15 ENTRIES
112
11'
114 J----- HEAD = TAll UIJICATES THAT THE BUFFER IS EMPTY
115
11. NUM_KEY EQU
; SCAN COOE FOR NUMBER LOCK
6'
117
EOU
70
I SCROLL LOCK KEY
l1e ALT_KEY
EQU
56
I ALTERNATE SHIFT KEY SCAN COOE
11. CTL1EY EQU
2.
I SCAN CODE FOR CONTROL KEY
120 CAPS_KEY
EOU
5. I SCAN CODE fOR SHIFT LOCK
121
LEFT_KEY
EOU
42 J SCAN CODE FOR LEFT SHIft
12.
RIGHT_KEY
EQU
54 I SCAN CODE FOR RIGHT SHIFT
123
INS_KEY
EQU I SCAN CODE FOR INSERT KEY ..
.,
124
DEl.-KEY
EOU
I SCAN CODE FOR DELETE KEY
125
126 1----------------------------------------
127
DISKETTE DATA AREAS
12.
J----------------------------------------
129 SEE~STATUS DB ; DRIVE RECALIBRATION STATUS
.. 0 BIT 3-0 = DRIVE 3-0 NEEDS RECAL BEF()f;!E
131
NEXT
SEEK IF BIT IS = 0
132
INTJLAG EQU
oeOH
I INTERRUPT OCCURRENCE FLAG
133 MOTOR_STATUS 08
I
MOTOR STATUS
134
BIT 3-0 = DRIVE 3-0 IS CURRENTlY RUNNING
135
BIT 7 = CURRENT OP IS A WRITE. REQUIRES DELAY
136
MOT()f;!_COUNT
DB
;
TINE OUT COUNTER FOR DRIVE TURN OFF
137
MOTOR_WAIT EQU ; TWO SEe Of COUNT FOR MOTOR TURN OFF
'7
13e
13.
DISKETTE_STATUS DB I BYTE OF RETURN CODE INFO FOR STATUS
14'
TIME_OUT EQU
;
ATTACHMENT FAILED TO RESPOND
"H
141 BAD_SEEK EQU
4'H
; SEEK OPERATION FAILED
142
BAD_NEe EQU
20H
I NEC CONTROLLER HAS FAILED
14'
BAD_CRe EQU
10H
; BAD CRC ON DISKETTE READ
144
DNA_BOUNDARY EQU
ooH
; ATTEMPT TO DHA ACROSS 64K BOUNDARY
145
BAD_DI1A. EQU ,eH I DMA oVERRLtI ON OPERATION
146 RECORD_NOT JND EQU
'4H
I
REQUESTED SECTOR HOT FOUND
147
WRITE_PROTECT EQU 03H I WRITE ATTEMPTED ON WRITE PROT DISK
14.
BAD_ADDR_HARK EQU O2H I ADDRESS HARK HOT FOlNJ
System BIOS 5-31

IBM 5150 Specifications

General

Brand	IBM
Model	5150
Category	Desktop
Language	English