Features; Cpu Block Diagram - Radio Shack TRS-80 26-3650 Service Manual

3.
CPU
(Central Processing Unit)
HD61913
3-1
.
Features
o
CMOS
one-chip
CPU
o
Built-in
ROM:
100864
bits
o
Built-in
RAM:
1896
bits
o
Built-in
display driver
o Memory backup
function
o
Clock:
400 kHz
Internal
machine
cycle:
200 kHz
Minimum
instruction
execute time: 10/xS
3-2.
CPU
Block Diagram
Control
signals
A
ROM
(System
Program)
7\
Instruction
Decoder
Address
Control
V
Keyboard
Signals
-
4
-