Motorola MVME2700 Series Manuel de service télécharger pdf (Page 175)

ENV – Set Environment

http://www.motorola.com/computer/literature 6-11

ROM First Access Length (0 - 31) = 10?

This is the value programmed into the MPC105 “ROMFAL” field

(Memory Control Configuration Register 8: bits 23-27) to indicate the

number of clock cycles used in accessing the ROM. The lowest allowable

ROMFAL setting is $00; the highest allowable is $1F. The value to enter

depends on processor speed. The default value varies according to the

system’s bus clock speed.

Note ROM First Access Length is not applicable to the

MVME2600/MVME2700/MVME3600/MVME4600. PPCBUG

ignores the configured value.

ROM Next Access Length (0 - 15) = 0?

The value programmed into the MPC105 “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. The default value varies according to

the system’s bus clock speed.

Note ROM Next Access Length is not applicable to the

MVME2600/MVME2700/MVME3600/MVME4600. PPCBUG

ignores the configured value

DRAM Parity Enable [On-Detection/Always/Never - O/A/N] = O?

Note This parameter also applies to enabling ECC for DRAM.

DRAM parity is enabled upon detection. (Default)

DRAM parity is always enabled.

DRAM parity is never enabled.

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Motorola MVME2700 Series Manuel de service Page 175