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Pin 110
SYMBOL
Signal name and Descrption
42
0
KBDTA
KBDTA1
Data to the keyboard controller
43
0
NMI
NMI1
Non maskable iterrupt
44
0
NUML
NUML1
NUM lock status
45
0
FAST
FAST1
CPU clock mode ("High"9.54MHz, "Iow"
=
4.77 MHz)
46
I
TEST1
P03AO
Output command inhibit signal
47
I
TEST2
P03BO
Test mode selection 2
48
I
TEST3
P03CO
Test mode selection 3
49
I
CLR
PSRSTO
PS reset
50
0
DRQO
DRQ01
DMA request for CHO
51
0
IRQ1
IRQ11
Interrupt Request level 1 signal. (for the keyboard
interrupt)
52
0
TMGAT
TMGAT1
Control signal to the gate 2 of the 82C53.
53
Vee
+ 5V
54
0
TMCLK
TMCLK1
Clock signal for the 82C53
55
0
CPCKB
CPCKB1
CPU clock (buffer)
A - 6
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