Motorola MVME2401-1, Installation And Use Manual

Page: 113 / 178

ENV - Set Environment
http://www.mcg.mot.com/literature 6-11
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ROMFAL setting is $00; the highest allowable is $1F. The value to
enter depends on processor speed; refer to Chapter 1 or Appendix B
for appropriate values. The default value varies according to the
system’s bus clock speed.
Note
ROM First Access Length is not applicable to the
MVME2400. The configured value is ignored by PPCBug.
ROM Next Access Length (0 - 15) = 0?
The value programmed into the“ROMNAL” field (Memory Control
Configuration Register 8: bits 28-31) to represent wait states in access
time for nibble (or burst) mode ROM accesses. The lowest allowable
ROMNAL setting is $0; the highest allowable is $F. The value to enter
depends on processor speed; refer to Chapter 1 or Appendix B for
appropriate values. The default value varies according to the system’s
bus clock speed.
Note
ROM Next Access Length is not applicable to the
MVME2400. The configured value is ignored by PPCBug.
DRAM Parity Enable [On-Detection/Always/Never - O/A/N] = O?
Note
This parameter (above) also applies to enabling ECC for
DRAM.
L2 Cache Parity Enable [On-Detection/Always/Never - O/A/N] = O?
PCI Interrupts Route Control Registers (PIRQ0/1/2/3) = 0A0B0E0F?
O
DRAM parity is enabled upon detection. (Default)
A
DRAM parity is always enabled.
N
DRAM parity is never enabled.
O
L2 Cache parity is enabled upon detection. (Default)
A
L2 Cache parity is always enabled.
N
L2 Cache parity is never enabled.