HP Portable PLUS - Page 46

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5.26 Functional Description
Portable PLUS Computer
For the ROM function, address decoder Ul selects the appropriate ROM or EPROM ICs. The PCA
contains eight sockets for installing the ROM or EPROM ICs. Jumper J2 selects the 'ROM' or
'EPROM' configuration (in the 1-2 position it selects the 'ROM' configuration).
Table 5·4. SNALInk/3270 Cable Pin Assignments
10·Pin Connector
Signal Name
25·Pin Connector
Pin Number
Pin Number
1 Signal Ground 7
2
CTS 5
3 RxD 3
4
DCD (RLSD)
8
5 DSR 6
6 RxDCE
17
7 TxDCE 15
8 RTS
4
9 TxD 2
10
DTR 20
Shield
Protective Ground 1
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