IBM 5150 Hardware Reference Manual

IBM Monochrome Display Adapter Block Diagram
-
(10)
(10) •
(12)
CPUADDR
MEMORY
2K MEMORY
2KMEMORY
ADDRESS
,...- CHARACTER
(11)
ATTRIBUTE
,--.
MUX
CODE
-
(8)
CPUDATA
DATA
BUS
(8)
,
GATING
CHARACTER
.Ir
(8) ~LOCI
BDO-7
r
OCTAL
OCTAL
MA
LATCH
LATCH
1
~
~
CHARACTER
ATTRIBUTE
~
GENERATOR
DECODE
RA
(4)
AD
~
MC6845
CHIP
~
CRTC
SELECT
DOTCLK
,
TIMING
~
I 1
SIGNALS
SHIFT
REGISTER
VIDEO
SDOTS
PROCESS
LOGIC
HSYNC, VSYNC, CURSOR, DISPEN
CHARACTER
CLOCK
I
r
.
~
MONITOR
DIRECT DRIVE
OUTPUTS
Figure 14. IBM MONOCHROME DISPLAY ADAPTER BLOCK DIAGRAM
2-38

IBM 5150 Specifications

General

Processor	Intel 8088
Clock Speed	4.77 MHz
RAM	16 KB - 256 KB
Manufacturer	IBM
Model	5150
Release Year	1981
Storage	5.25-inch floppy drives
Graphics	MDA or CGA
Operating System	IBM PC DOS
Ports	Cassette, keyboard
Expansion Slots	5