mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-23 23:38:06 +11:00
da371451cc
Now I struggle to remember why I ever did things they way I did. There must have been a reason...
17 lines
533 B
Plaintext
17 lines
533 B
Plaintext
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:
|
|
|
|
RAMSTART: beginning address of RAM. This is where system
|
|
variables are placed. HERE is then placed at RAM+80 (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.)
|