System Settings NVR Memory
The System Settings NVR
Memory is in the TOP two 32K blocks of CPU#0's 8 MB Extended Mode Memory
it can also be accessed by CPU#1's 4 MB Hardware Control Mode Memory at
Blocks &H80 and &H81.
It is 56Kin size enough to
store lots of stuff a definite definition of what goes where is needed.
A partial list of the data
stored there is:
- System Startup Mode Data
- Keyboard Macro Data for Fn.
- Snapshot GPU and CPU register data.
- Default CoCo 3 screen modes for the Composite and VGA monitors CMPo
CMPe or RGB.
- CoCoGREEN and CoCoRED vm definition data.
- CoCo System Revision Order if this does not match the revision
number of the System ROM
certain settings data may be considered suspect stored in sections of
the setup memory for backup settings and a warning
"CAUTION:Inconsistent settings found review
your update procedure".
- Directory Data for u9:
- Address pointers for drivers and games installed in User EEPROM
memory.
- Background Status Bits
- Virtual Screen Group Definitions
and Many others ect. ect. ect....