PMAC-Lite Hardware Reference
22
E-Point
Descriptions
E89: Amplifier-Supplied Switch Pull-Up Enable
E Point &
Physical Layout
Location Description
Default
E89
F2
Jump pin 1 to 2 to use A+15V on J8
(JMACH1) pin 59 as supply for input
flags.
Remove jumper to use A+15V/OPT+V
from J7 pin 59 as supply for input
flags.
Note:
This jumper setting is only
relevant if E90 connects pin 1 to 2
Jumper installed
E90: Host-Supplied Switch Pull-Up Enable
E Point &
Physical Layout
Location Description
Default
E90
F2
Jump pin 1 to 2 to use A+15V from J8
pin 59 as supply for input flags (E89
ON) {flags should be tied to AGND}
or A+15V/OPT+V from J8 pin 11 as
supply for input flags (E89 OFF)
{flags should be tied to separate 0V
reference}.
Jump pin 2 to 3 to use +12V from PC
bus connector P1-pin B09 as supply
for input flags {flags should be tied to
GND}.
Also, see E85, E87, E88 and PMAC
Opto-isolation diagram.
1-2 Jumper
installed
E91 - E92: Bus Base Address Select (High Bits)
E Point &
Physical Layout
Location Description
Default
E91 E92
C3
E91 - Bit 11 PC bus base address
E92 - Bit 10 PC bus base address
ON = 0 OFF = 1
Jumper installed
These jumpers work with E66 - E71 to set the base address of PMAC-Lite on the PC bus. See PMAC-
Lite PC Bus Addressing below for details on how to set these jumpers.
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