
VMOD-2/VMOD-2D
12/15/97
Configuration
Page 3 - 4Man. ID 03139, Rev. Index 0200
* = Three pin jumper type with default having no pins connected.
3.1.1Jumper B1, Selecting Interrupt Vector Options
Jumper B1 provides the selection of how your VMOD-2 or it's piggybacks may provide the
interrupt vector to the VMEbus, as shown in the following table.
Note!
If wanting mixed "Intelligent and Dumb" interrupt vector support, fit the
"dumb" piggyback into the upper location (to use the VMOD-2's preset
jumper vectors) and the "intelligent" piggyback into the lower location.
3.1.2Jumpers B2, B12...B15 Selecting Base Address
Via the five jumpers B02, B12, B13, B14 and B15, you are able to set your VMOD-2's base
address in steps of 256 Bytes, to any desired base address from $FE 04 00 to $FE FC 00. In
all permitting up to 32 different address setting options. If jumper B16 is set, the address steps
increase in width to 8 KByte (jumper settings of B14 and B15 are no longer interpreted), and
B17 Set M SB of IRQ * leve l coding 3.1. 7
B18 Set 2nd bit of IRQ* level coding 3.1.7
B19 Open LSB of IRQ* level coding 3.1.7
B20 1 -2 External "local" Reset input is Disabled. 3.1.8
Table 3-2: Selecting Interrupt Vector Source (PB or VMOD-2)
From either of the two
"Intelligent" PBs
Open Default Setting
From VMOD-2's B4..B11
settings
Set 1-2 For 2 x "dumb"
PBs
From "Intelligent" PB in "B"
location (lo wer) & from
VMOD-2 for "A"
Set 1-3 Ensure the PB fit-
ted in the lowe r
PB location sup-
ports this feature
Table 3-1: General Overview of the VMOD-2 Jumpers
Brief Functional Description
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