Commodore 128 System Manual page 247

BACKUP DO TO D1 ON U9
Copies all data from drive 0 to drive 1, in disk drive unit 9.
BANK
Select one of the 16 banks, numbered 0-15
BANK bank number
This statement specifies the bank number and corresponding
memory configuration for the Commodore 128 memory. The
default bank is 15. Here is a table of available BANK
configurations in the Commodore 128 memory:
BANK CONFIGURATION
0 RAM(O) only
1 RAM(1) only
2 RAM(2) only*
3 RAM(3) only*
4 Internal ROM,RAM(O),I/O
Internal ROM,RAM(1),I/O
5
6 Internal ROM,RAM(2),I/O*
7 Internal ROM,RAM(3),I/O*
8 External ROM,RAM(O),I/O
9 External ROM,RAM(1),I/O
10 External ROM,RAM(2),I/O*
11 External ROM,RAM(3),I/O*
12 Kernal and Internal ROM(LOW),RAM(0),I/0
13 Kernal and External ROM(LOW),RAM(0),I/0
14 Kernal and BASIC ROM,RAM(O),Character ROM
15 Kernal and BASIC ROM,RAM(0),I/0
* For use on extended C128s with a larger internal memory eg:
256K. ln unexpanded machines there is no RAM in these BANKs
and 2 echoes 0 and 3 echoes 1.
To access a particular bank, type BANK n (n=0-15) and then use
PEEK/POKE or SYS. From within the monitor, precede the four­
digit hexadecimal number of the address range you are viewing
with a hexadecimal digit (0-F)
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