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collapseos/blk/280
Virgil Dupras 3068b58be5 Rename RAMSTART to SYSVARS
It's more descriptive this way. Also, I'll soon add a new HERESTART
config.
2020-06-28 18:49:30 -04:00

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Z80 boot code
This assembles the boot binary. It requires the Z80 assembler
(B200) and cross compilation setup (B260). It also requires
these constants to be set:
SYSVARS: This is where system variables are placed. HERE is
then placed at SYSVARS+0x80 (ref B80).
RS_ADDR: to be set to the bottom address of the Return Stack.
PS_ADDR: top address of the Parameter stack (PS grows down-
wards). Allow space for stack underflow protection (B76).
(cont.)