IBM 5100 - Page 359

(
(
(
(~
('
Control Command Data Table (Continued)
Device
Address Device
Bits
State
Bits 4-7
Name 8-15 of Bit Definition
F
All I/O
8 0 No action
1
Reset expansion feature (DA = 8)
9 0 No action
1
Reset tape (DA = E)
10
0 No action
1
Reset keyboard (DA = 4)
11 0 No action
1
Reset printer (DA = 5)
12
0 No action
1
Enable cycle steal for display (un blank display)
13 0 No action
1
Reset (DA = B)
14
0 No action
1
Reset (DA = C)
15
0
No action
Reset (DA = D)
GETA DA,
Ry (op code 0): A data byte is transferred
from
an I/O device designated by DA to the controller on
bus in. The contents of the data register (Ry) have a value
added to it depending on the data received from the
device:
Bus In Bits 0 1 2 3 4 5 6 7
1 1 1 X
111110X
1 lOX X
1110XXX
110XXXX
OXXXXX
10XXXXXX
OXXXXXXX
The Xs are don't cares.
Quantity Added
o
2
4
6
8
A
C
E
Bus in is not parity checked on this microinstruction.
'Get strobe'
is activated on this microinstruction.
:$
if
I
Microinstructions C-7