Themis USPIIi-1v, Hardware Manual

Page: 53 / 128

Themis Computer
5-13
5. Universe-IIB Description
15:12 PGM [3..0] R/W 0 Program/Data AM Code
Each of the four bits specifies Program/Data AM code for the cor-
responding 16 mB region. The lower order bits correspond to the
lower order address regions.
0 = Data, 1 = Program
11:8 SUPER [3..0] R/W 0 Supervisor/User AM Code
Each of the four bits specifies Supervisor/User AM code for the
corresponding 16 MB region. Lower order bits correspond to the
lower address regions.
0 = Non-Privileged, 1 = Supervisor
07-02 BS [5..0] R/W 0 Base Address
Specifies a 64 MB aligned base address for this 64 MB image
01 Reserved
00 LAS R/W 0 PCI Bus Address Space
0 = PCI Bus Memory Space, 1 = PCI Bus I/O Space
Table 5-15. Special PCI Target Image Register (Offset 188)
Bits Name Type Reset
State
Description