85C220
CLOCK.
RESET
GENERATOR
CLK
RESET CLK2
INTIPOo7
#. AO 8259A
CS# ~ i ~
TO
lA- INTERRUPT
1'1
l
~
(Xl
.!.J
I J.
T
RESET ClK2
A05#
INTR
NA#
M/IO#
W/R#
D/C
READY#
i386'~ OX
CPU
U
f | - |
| - |
| |
. - | - |
| - |
Pf1RDY
READY
AS
7aA3 ,74F138
CLK2 IOPLD1=:J
CLK10RDY
NA | TRIOEN - |
MilO | - |
WIR | INTA |
D/C | EPRD |
A31 | IOWA |
TIMEDLY | lORD |
BUSCVC | RECV |
| CLK2 | IOPLD2 | ~ |
|
|
|
| ||
f- | CLK | WICNTO ~ |
| |
| ADS | WTeNT1 | - |
|
| READY | WTCNT2 | - |
|
| INTA | P20R8 | - |
|
|
|
| ||
| EPRDY |
| - |
|
| IOWR | PIRECYC | - |
|
| lORD | BUSCYC | - |
|
- | RECV | ALEJO | - |
|
CS1WS | TIMEDLY | - | ~ | |
- | CS3WS | CSSWS - | ||
TTT
UI ::>
<II
~
Q
0
t-
_ 10
.::::::
o
Z
)l!
Q
z
C)
BEO#
BE1#
8516#
ADDRESS BUS
ADDRESS BUS
..........
DT/R# OEN#
~ALE#
r 74F373
LATCHES
. 2
.. | I | UI |
OE | ::> | |
| <II | |
27256A | ;! | |
| EPROM | « |
| Q | |
V | . 2 | 0 |
| t- |
| Ii |
DATA BUS | |
| ~ |
--
.. 74F245
TRANSCEIVER
V. 2
TO DATA BUS | 11 | j | TO |
|
|
| DATA BUS |
Y
