Tandy 2000 Service Manual page 42

Tandyo
Model
2000
Service ilanual
IITAIN
LOGIC
PCB
REV
.
PPz
J5
MOTHER BOARD
CONNECTOR
(
96-PIN
MALE
EUROCONNECTOR)
OIA
NO
CONNECTION
02a
GND
03a
cND
O4A
BUSBLANK
05a
BUSCLK
06a
NMI*
O
7
A
BUSVLT
08a
BUSPCLK
09a
BUSRFSH*
10a
BUSIOR*
11A
BUSHLDA*
L2a
BUSBHE*
13a
BUSMCSI
*
14a
BUSMR*
15a
BUSRFINH*
15
a
BUSII,IRST*
L7
a
BUSDT/R*
I8a
BUSDMACK2*
I9A
BUSALE
20a
cND
2La
BUSD04
22a
BUSD06
23a
BUSD0 0
24a
BUSD14
25a
BUSDI3
26a
BUSDO8
27
a
BUSAll
28a
BUSA18
29a
BUSAI9
30a
BUSAO8
3Ia
BUSAI0
32a
BUSAI6
0Ib
02b
03b
04b
05b
06b
07b
08b
09b
10b
ltb
L2b
13b
14b
lsb
16b
t7b
tBb
t9b
20b
2Lb
22b
23b
24b
25b
26b
27b
28b
29b
30b
3rb
32b
NO
CONNECTION
AGVID
GND
G/A
BUSHSYNC
GND
NO
CONNECTION
BUS
INTO
3
BUS
INTl6
HDCINTO
6
RATINTl2
BUS
IOW*
BUSIvICS
O
*
BUSIvIW*
BU
SL/ B*
BUSDEN*
BUSDMACK3
*
MEMINTI5
BUSHOLD*
GND
BUSDO 5
BUSD
O
7
BUSDO
I
BUSDI
O
BUSDO 9
BUSAO 4
BUSAI2
BUSAIT
BUSAI
3
BUSAO 9
BUSAO
3
BUSAO 6
NO
CONNECTION
NO
CONNECTION
GND
BUSDOTCLK
BUSVSYNC
AINT
NO
CONNECTION
BUSPCS5
*
BUSPCS
4
*
BUSPCS
3
*
BUSLOCK*
BUSDMARQf 't
BUSDIvIARQ],t
BUSARDY*
BUS
INTO
5
BUS
INTO
7
BUS
INTI7
BUSD},IACKI
*
BUSDMARQI*'
GND
BUSDO
3
BUSDl5
BUSDO 2
BUSDI
1
BUSD1
2
BUSAO
O
BUSAO
7
BUSAI5
BUSAI4
BUSAOl
BUSAO 2
BUSAO 5
0Ic
02c
03c
04c
05c
06c
07c
08c
09c
10c
lIc
L2c
13c
14c
15c
I6c
L7c
18c
I9c
20c
2Lc
22c
23c
24c
25c
26c
27c
28c
29c
30c
3lc
32c
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