HP E1432A User's Guide

Register Definitions

The A24 Registers

The following A24 registers are accessible at the base address defined by the device’s offset Register. The registers at offsets 0 to E16 are not accessible using longword (D32) accesses. The registers at offsets 1016 to FFFFF16 may be accessed by any of the of the D08(EO), D16, or D32 modes.

FFFFF16

Movable DSP

8000 016

Bus Window

7FFFF16

Fixed DSP

3000 016

Bus Window

2FFFF16

Send/Receive

2000 016

Data Registers

1FFFF16

Fixed DSP

0004 F16

Bus Window

0003 F16

VXI Bus A16

0000 016

Registers

The A24 registers are defined as follows:

￿VXI Bus A16 Registers: These are the same registers accessed at the device’s A16 base address.

￿Fixed DSP Bus Window: Accesses to this region are mapped to the corresponding locations at the base of the internal DSP’s memory map, also accessible through Page 0 of the moveable DSP bus window.

￿Send/Receive Data Registers: Accesses to any address in this region will read/write the Send and Receive Data registers defined in the A16 register set. VME Bus D32 Block Transfers are supported for these addresses only.

￿Movable DSP Bus Window: Accesses to this region are mapped (by the Page Map register) to different 512 kB regions of the internal DSP bus.

A-4