move BIOS string definitions out (cleanup)
begin adding code to allow dynamic allocation of BIOS locations
rom bios allocation. first use: the reset vector.
allocator for ROM BIOS area
more work, vptable now allocates
cleanup
use new rom bios allocation system to mark off 8x8 legacy font at
0xF000:0xFA6E (wow, I remember writing code against that too!)
add code where, if not mainline compatible mapping, the legacy 8x8 CGA
font (first 128 chars) fixed at 0xF000:0xFA6E can be disabled (much like
how many modern motherboards don't seem to have that table anymore).
add configuration option to enable/disable INT 1Dh video parameter
table.