Ram (Random Access Memory); Ram2 - Radio Shack TRS-80 Service Manual

4. RAM (Random Access Memory)
HD61914 is 1K byte RAM and contains self-control circuits.
The following shows a memory map of RAM 1 and RAM 2 (optional RAM pack).
000
System Memory
t - - - - - - - - - - - - - - - - - - i
21F
220
RAM 1
User's Area
7FF
t - - - - - - - - - - - - - - - - - - i
800
RAM2
User's Area
FF F
I--.-------------~
Note: The above 8ddr. . . .
for
C8I8I
when
one
word
is
4 bits.
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