only 12K
The remainder of the RAMCard RAM
Control addresses are entered either in hexadecimal, for assembly language programs, or in decimal, for BASIC programs. Hexadecimal addresses begin with the dollar sign ($).
All of the hexadecimal control addresses have the form $C08x. x is any of the hexadecimal digits
The hexadecimal digits
HEX BINARY
00 0 00
10 0 01
20 0 10
30 0 11
81 0 00
91 0 01
A1 0 10
B1 0 11
Bits 0 and 1 (the two right columns of each binary number) are read together to select the functions. As you can see there are only four selections — 00, 01, 10, 11. These selections are repeated.
Bits 0 and 1 together select the following functions:
00 Selects RAMCard RAM read and RAM
01Selects
2 3