Commodore PET User Manual page 320

Each PET has 32K of RAM address space, allocated between active RAM
and Expansion RAM. as follows:
Active RAM
4K (0-4095)
8K (0-8191)
16K (0-1638)
Expansion RAM
28K (4096-32767)
24K (8191-32767)
Addresses 32768-36863: 4K Video RAM
The first thousand locations of this block, from addresses 32768 through
33767. are allocated to screen memory. A POKE to any of these locations displays
the character in the appropriate screen position.
32768
33792
34816
35840
36863
TV RAM
Images of
TV RAM
Images of
TV RAM
Images of
TV RAM
1K
Addresses 36864-49151: Expansion ROM 12K
Memory addresses 36864 through 49151 are allocated for optional expan-
sion of ROM to 26K.
36864
40960
45056
49151
Expansion
ROM
Expansion
ROM
Expansion
ROM
4K
307