Configuration; Pb-Sio4 Address Map And Id Byte; Vmebus Interrupts - PEP PB-SIO4 Manual

PB-SIO4

3. Configuration

3.1 PB-SIO4 Address Map and ID Byte

The PB-SIO4 is addressed (odd byte access) by using the carrier board base address
and one of the following offsets for the piggyback location:
Piggyback location A ( the upper position on the carrier board)
Base Address + $01
Base Address + $21
Base Address + $41
Piggyback location B ( the lower position on the carrier board)
Base Address + $81
Base Address + $A1
Base Address + $C1
The PB-SIO4 has an ID Byte of $F7 (RS232).

3.2 VMEbus Interrupts

Each DUART device is able to issue an interrupt request (*IRQ) to the carrier board. In
the event of simultaneous interrupt requests those from DUART #1 have priority over
those from DUART #2.
The interrupt level is set by the carrier board. See the carrier board documentation for
setting of the level. The interrupt vector itself is provided by the DUART.
ID 19957, Rev. 0300
DUART1
DUART2
ID Byte
DUART1
DUART2
ID Byte
® PEP Modular Computers GmbH
Configuration
Page 3 - 3