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MOpEL 631 liD BOARP
Legend
Location
JA
JB
JC
JD
JF
JG
JH
JJ
Jl
J2
J3
I/O Address Select
Normally 20R
(A5 unshunted, A6 and A7 shunted).
Parallel Port C Select
Normal Shunting:
(for Centronics printer)
PC6 - Horizontal pair
PC4 - V cttical pais:
PCO - Vertical pair
Parallel Port A Direction Select
Normal
=
no shunt
(for Centronics printer)
Parallel Port B Direction Select
Normal
=
shunted (for Centronics printer)
Serial channel
a
Transmit/Receive Interrupt
Normally VB.
Serial Channel 1 TransmIt/Receive Interrupt
Normally VB.
Parallel Port B Interrupt
Normally unshunted.
Parallel Port A Interrupt
Normally unshunted.
Serial Port
a
(usually connected to channel
1)
Serial Port 1 (usually connected to channel 2)
Parallel Port (connected to parallel printer port)
IMS International
5000 Series Microcomputers/7.0 1.83/page 56
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