Specifications

Acorn Enhanced Expansion Card Issue 5, August 1994 11
Acorn Enhanced Expansion Card
Figure 5: Extended ECId with paged ROM
Figure 6: IOC driving an expansion card read cycle
PS
LA13
PR/W
OE
PS
PS
PR/W
OE
BD[0:7]
LA2
LA3
LA[n]
EPROM
Page
Register
write
data bus
to rest
of expansion card
page numberQD
Q
PWE
P.R. address
RST
reset
FIQ
IRQ
Int.
Status
REF8M
IORQ
IOGT
PS
PRE
RBE
BL
BD[0:15]
LA[2:15]
PR/W
CLK8