![]() ![]() The times process will fill any empty space up to 512 bytes with a zero. To do this, type at the end of the program: times 510 - ($-$$) db 0 This means that we will not have access to any features provided in 32 or 64 bit mode, however it also means that it is easier to program.Īt the end of the program, we need to limit the size of the program, and give it a special address that the BIOS will look for when identifying the program. "bits 16" tells the computer to run in 16-bit mode. It is 0x7C00 as that is the specific memory address the BIOS searches for, as stated previously. The "org" instruction tells the computer the memory address the program starts at. To do this, we will need to type: org 0x7C00 For our purposes, we will start at the address 0x7C00, and we will use a 16 -bit program. ![]() We will need to specify the start address of the program and the type of program. First, we will need to specify two things, at the start of the program.
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