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7701
~l(lc') [~;)UJJ®~~~~~~~~--~-·-·:MEMORY
CARD
16K BYTE STATIC RAM
MEMORY CARD
This card provides sockets for up to 16,384 bytes of
Read-Write or PROM Memory. The card uses 2114
type RAMs or equivalent and has sockets for 16
pairs of RAMs. Alternately the card wi" accept 3625
type PROMs or equivalent. PROMs and RAMs can
not be mixed on the same card.
The 7701 decodes 16 address lines, and can be
mapped into either 8K or 16K bytes of consecutive
address space. An on-card jumper system allows
users to establish which 16K segment of a 64K
microprocessor memory each 7701 occupies.
FEATURES
• Sockets for 16K bytes of 2114L RAMs or 3625
PROMs
• User selectable card address
• All STO BUS lines buffered
• Minimal logic bus loading
• All Ie's socketed
• Single +5V operation
• Use Pro-Log 01004, 1Kx8 memories (two
2114L's)
II
3-STATE
BUS
DATA BUS
Do-D7
I
CONTROL
MEMRQ"
RD"
WR"
MEMU"
ADDRESS
A13-A15
ADDRESS
A10-A12
ADDRESS
Ao-A.
)
,.
-
READ
,.
WRITE
-
CONTROL
~
-
CARD
3/
SELECT
P-
DECODER
I
l
CHIP
1.0..
SELECT
r-
31
DECODER
,
101
BUF
I
11K STATIC RAM
SHADING INDICATES SOCKETS ONL Y
"\
11/
,
101
,
1
DATA
1/
,
RAM ARRAY
IK.I
""IW
DATA
~
r
~"E"
~
•• AV
IKd
-RIW
DATA
HU
/
- I l l
'"
ADORE I I
/
7701
"INDICATES ACTIVE LOW LOGIC
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