Motorola M68CPU32BUG Manuel d'utilisateur Page 190

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USER CUSTOMIZATION
M68CPU32BUG REV 1 C-16
C.6 BCC REV. B CHIP SELECTION SUMMARY
Table C-4 covers Rev. B of the M68332BCC Business Card Computer and M68332PFB
Platform Board.
Table C-4. Rev. B Chip Selection Summary
Signal Board/Chip Description Memory Type
CSBOOT BCC U4 CPU32Bug EPROM
CS0 BCC U3 write enable for MSB=UPPER=EVEN RAM
CS1 BCC U2 write enable for LSB=LOWER=ODD RAM
CS2 BCC U2/U3 read enable for MSB/LSB=BOTH RAMS
CS3 <unused>
CS4 PFB ABORT pushbutton 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 RAMS
CS9 PFB U1 write enable for LSB=LOWER=ODD RAM
CS10 PFB U3 write enable for MSB=UPPER=EVEN RAM
NOTE
U1/U3 = 120 nsec RAM with fast termination.
U2/U4 = 250 nsec EPROM (or jumper selectable as RAM).
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