PMAC-Lite Hardware Reference
E-Point Descriptions
19
E66 - E71: Bus Base Hardware Address (Low Bits)
These jumpers work with E91 & E92 to set the base address of PMAC-Lite on the PC bus. See
PMAC-
Lite Bus Addressing
below for details on how to set these jumpers.
E Point &
Physical Layout
Location Description Default
E66 E67 E68 E69 E70 E71
C3/D3
E66-Bit 9 PC bus base
address
E67-Bit 8 PC bus base
address
E68-Bit 7 PC bus base
address
E69-Bit 6 PC bus base
address
E70-Bit 5 PC bus base
address
E71-Bit 4 PC bus base
address
ON = 0; OFF = 1 for
calculating bus address
E67-E70
installed
E72 - E73: Panel Analog Time Base Signal Enable
E Point &
Physical Layout
Location Description
Default
E72
D2
Jump pin 1 to 2 to allow V to F
converter FOUT derived from Wiper
input on J2 to connect to CHA4
No jumper
installed
E73
D2
Jump pin 1 to 2 to allow V to F
converter sign out derived from
Wiper
input on J2 to connect to CHB4
No jumper
installed
Note:
With these jumpers ON, no encoder should be wired into ENC4 on JMACH1. E27 must connect
pins 1 to 2 because these are single-ended inputs. Variable I915 should be set to 4 to create a positive
voltage (frequency) number in PMAC.
E74 - E75: Clock Output Control for Ext. Interpolation
E Point &
Physical Layout
Location Description
Default
E74
D2
Jump pin 1 to 2 to allow SCLK/ to
output on CHC4/
No jumper
installed
E75
D2
Jump pin 1 to 2 to allow SCLK to
output on CHC4
No jumper
installed
Note:
SCLK out permits synchronous latching of analog encoder interpolators such as ACC-8D Opt 8.
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