Memory map of original 1050 disk drive

0000 - 007F  RAM (6810)
0080 - 00FF  RIOT RAM
0100 - 017F  RAM (6810) mirror
0180 - 01FF  RIOT RAM mirror
0280 - 02FF  RIOT REGS
0380 - 03FF  RIOT REGS mirror
0400 - 07FF  2793 regs
0800 - 087F  RAM (6810) mirror
0880 - 08FF  RIOT RAM mirror
0900 - 097F  RAM (6810) mirror
0980 - 09FF  RIOT RAM mirror
0A80 - 0AFF  RIOT REGS mirror
0B80 - 0BFF  RIOT REGS mirror
0C00 - 0FFF  2793 regs mirror
1000 - 1FFF  2332 os rom

2000 - 3FFF  mirror of whole address space
4000 - 5FFF
6000 - 7FFF
8000 - 9FFF
A000 - BFFF
C000 - DFFF
E000 - FFFF