How to build

GLaBIOS is built using MASM 5.0 or MASM 6.1. Note: MASM 5.1 has some issues that cause problems with the build process so is not recommended.

Build Process:

MASM 5.0:

1. MASM GLABIOS; (note: add /L to create the .LST listing file).
2. LINK GLABIOS; Will create GLABIOS.EXE.

MASM 6:

1. ML.EXE /I. /Zm /c GLABIOS.ASM (note: add /Fl to create the .lst listing file)
2. LINK GLABIOS; Will create GLABIOS.EXE.

You may also specify CPU and ARCH types on the command line:

• MASM 5: MASM /L /DCPU_TYPE="8" /DARCH_TYPE="T" GLABIOS;
• MASM 6: ML.EXE /I. /Fl /Zm /DCPU_TYPE='8' /DARCH_TYPE='T' /c GLABIOS.ASM

Create ROM binary:

3. Run GLA2ROM GLABIOS (included in src folder) to convert to an 8 KiB ROM file.

Alternate step 3:

1. Convert EXE manually by removing the EXE header (the first 512 bytes of the EXE file) and extracting the last 8 KiB
2. Calculate 8-bit checksum byte and insert into relative file offset 1FFF in GLABIOS.ROM. The low byte of sum of all bytes should equal 0.