IBM XT 5160 User Manual

Interrupt Address
Function
20
80-83 DOS program terminate
21
84-87 DOS function call
22
88-8B
DOS
terminate address
23
8c-8F
DOS Ctrl
Break exit address
24
90-93
DOS
fatal error vector
25 94-97
DOS
absolute disk read
26
98-9B
DOS
absolute disk write
27 9C-9F
DOS terminate, fix in storage
28-3F
AO-FF
Reserved for
DOS
40-5F
100-17F
Reserved for BIOS
60-67
180-19F
Reserved for user program interrupts
68-6F
1AO-1BF
Not used
80-85 200-217
Reserved for BASIC
86-FO
218-3C3
Used
by BASIC
interpreter
wh i le
BASIC
is running
F1-FF
3C4-3FF
Not used
Hardware, Basic, and DOS Interrupts
Address Mode
400-4A1
ROM BIOS
4A2-4EF
4FO-4FF
500-5FF
500
DOS
504
510-511
512-515
516-519
51A-51D
DOS
BASIC
BASIC
BASIC
BASIC
Function
See BIOS listing
Reserved
Reserved
as intra-application
communication area for any application
Reserved for DOS and BASIC
Print screen status flag store
O=Print screen not active or successful
print screen operation
l=Print screen in progress
255=Error encountered during print
screen operation
Single drive mode status byte
BASIC's segment address store
Clock interrupt vector segment:offset store
Break key interrupt vector segment:offset
store
Disk error interrupt vector segment:offset
store
Reserved Memory Locations
5-8 System BIOS

IBM XT 5160 Specifications

General

Brand	IBM
Model	XT 5160
Category	Desktop
Language	English