GLaBios and own code

Last Updated or created 2023-06-22

Altered glabios to run code at F600:0000 instead of basic rom.
(Needs to have code to check if rom exists)

My test code and generating rom is below:
It should set leds on the keyboard to on .. we will see tomorrow.

NAME mycode
.model small
ORG 0h

.code
start:	mov al, 11000000b
        out 80h, al
loop1:  nop
	jmp loop1
ORG 1fffh ; end of rom
	db 0
END

makefile is:

@ECHO OFF
MASM /DARCH_TYPE="T" /DCPU_TYPE="V" MYROM;
LINK MYROM;
EXE2COM MYROM.EXE
REN MYROM.COM MYROM.ROM

That looks okay!

MOV AL = B0
C0 = 11000000
OUT = E6
80h = 80h
90 = NOP
EB = relative jump
FD = -3 to NOP instruction

Spread the love

Prutser ..