Commodore Amiga A500 Technical Reference Manual page 21

EXPANSION
ARCHITECTURE
OVERVIEW
DOWNSTREAM BACKPLANE
PIC
S
L
A O
B
V W
U E
N
F
F
E
R
A
S
M
I
G
A
COLLISION
BUS STEERING and ENABLE
BUS ARBITRATION
As shown in Figure 3.1, "Expansion Architecture Overview," the ex-
pansion bus is implemented as backplane (an expansion box) which
accept PICs (boards). The recommended number of PICs to a back-
plane is five.
Due to timing considerations, it is not possible to daisy-chain more
than two buffered backplanes without inserting wait states.
You should also take extreme care in controlling signal
radiation from your product, in order to pass FCC class B
regulations.
PIC PIC
Figure 3.1. Expansion Architecture Overview
18
NOTE
UPSTREAM BACKPLANE
DATA
ADDRESS
COLLISION
SLAVE*
BUS STEERING and ENABLE
DMA*
BUS ARBITRATION
PIC PIC
PIC