giomba
b461731f45
The Makefile now builds the demo with $100 as its entry point, then it is linked both against the bios-only crt, and the CP/M-aware crt. The bios-only version can be run without the operating system, but needs to be loaded via serial directly using a BIOS rom with a custom loading routine. The CP/M-aware version, instead, can be run as a normal executable from a diskette, but keep in mind that this is a demo, so it is not designed in such a way that it is safe to go back to CP/M at the end of the demo. It may be possible, but I won't make any effort to guarantee it.
15 lines
169 B
NASM
15 lines
169 B
NASM
; C startup code for serial loader (BIOS-only)
|
|
SECTION code_compiler
|
|
org $100
|
|
|
|
EXTERN _main
|
|
|
|
PUBLIC __Start
|
|
|
|
__Start:
|
|
ld sp,0xc000
|
|
|
|
call _main
|
|
|
|
jp ASMPC
|