how do I specify the beginning of root data? In rev 7.21 I set #define DATAORG 0xB000 in rabbitbios.c

#define DATAORG 0xB000 // Begining logical address for data seg.
// A user with a lot of root code
// and not alot of root data can increase
// this in increments of 0x1000 to as high
// as 0xB000 to allow more root code space.
// OR, root data space can be increased by
// lowering this to as low as 0x3000. was 0x6000

from rabbitbios.c dynamic 7.21

DATAORG is a macro that is #define’d near the top of the BIOS. It can be adjusted up or down in
0x1000 byte increments. With separate I&D, adjusting it up gives more space for root constants and less
for root variables. Without separate I&D, adjusting it up gives more space for root code and constants and
less space for root variables.

In DC10 and above the DATAORG macro has been replaced by ROOT_SIZE_4K