Cache Memory Subsystems; Setting The Jumpers - ECS Electronics SI54P AIO User Manual

5
Table 4­1. Jumper Settings (Continued . . . . .)
Function Jumper Settings
50MHz (for 75MHz CPU) JP7 short 2-3, 5-6, 7-8
CPU Clock Select
60MHz (for 90MHz CPU)
JP7 short 2-3, 4-5, 8-9
66MHz (for 100MHz CPU)
JP7 short 1-2, 5-6, 7-8
Internal Cache Write-back JP12 short 1-2
Internal Cache Write-
JP12 short 2-3
CPU Signal Select
through
Always invalidated JP14 short 1-2
Write to invalidated
JP14 short 2-3
256KB (with 32Kx8 JP11 open
SRAMs) JP10 open
External Cache
512KB (with 64Kx8 JP11 short
Memory Settings
SRAMs)
JP10 open
1 MB (wi t h 128Kx8 SRAMs)
JP11 short
JP10short
The table below summarizes the functions and jumper settings on the SIS4P
AIO. .
3.1 Setting the Jumpers
3 Jumper Settings and Connectors
Table 2­2. Second Level Cache Memory Configurations
Cache Size
Dirty RAM TAG RAM Data (U23-26)
(U28) (U27) (U34- U37)
256KB
32Kx8 (5V) 32Kx8 (5V) 32Kx8 (3.3V)
512KB 32Kx8 (5V)
32Kx8 (5V)
64Kx8 (3.3V)
1MB 32Kx8 (5V) 32Kx8 (5V) 128Kx8 (3. 3 V)
Cache Memory Subsystems
SJ54P AIO User's Manual