Motorola M68CPU32BUG User Manual download pdf (Page 31)

OPERATING INSTRUCTIONS

M68332BCC/D 3-3 MOTOROLA

REV 1

Table 3-2. BCC Rev. B Chip Selection Summary

Signal Board/Chip Description Memory Type

CSBOOT BCC U2 CPU32Bug EPROM

CS0 BCC U1 write enable for MSB=UPPER=EVEN RAM

CS1 BCC U3 write enable for LSB=LOWER=ODD RAM

CS2 BCC U3/U1 read enable for MSB/LSB=BOTH RAM

CS3 <unused>

CS4 PFB ABORT push-button autovector

CS5 PFB U5 chip enable for MC68881/882. cut/-jump U5-J3

from CS2 to CS5 required.

CS6 PFB U2 read enable for LSB=LOWER=ODD RAM/EPROM

CS7 PFB U4 read enable for MSB=UPPER=EVEN RAM/EPROM

CS8 PFB U1/U3 read enable for MSB/LSB=BOTH RAM

CS9 PFB U1 write enable for LSB=LOWER=ODD RAM

CS10 PFB U3 write enable for MSB=UPPER=EVEN RAM

Table 3-3. BCC Rev. C Chip Selection Summary

Signal Board/Chip Description Memory Type

CSBOOT BCC U3 CPU32Bug EPROM for MSB=UPPER=EVEN

CSBOOT BCC U4 CPU32Bug EPROM for LSB=LOWER=ODD