What are the best X86 and X64 memory locations for booting an OS from the Programmable ROM?

[WorldsDumbestCoder]

What are the best X86 and X64 memory locations for booting an OS from the Programmable ROM?

Here is how the OS will work:

• Use org to set the memory addresses for where the bootloader and kernel should be stored.

• Allocate bytes.

• Jump to those memory locations.

• Kernel will be stored into RAM.

• Bootloader will be stored into ROM.

X86 memory locations:

Kernel:

RAM:

• Physical Address Range: 0x00000000- 0xFFFFFFFF (4GB)
• Usable Memory Range (approximate): 0x00000000 -0x3FFFFFFF(1GB) due to reserved addresses for system devices and BIOS

Bootloader:

PROM:

• Programmable ROM Address:0xFFFFFFF0
• Jump to the RAM to load the kernel

bits 32
org 0xFFFFFFF0
section .data 
 bootloader: times 52 db 0 
section .text
 global _start
_start:
 ; Load the bootloader
  mov ecx, bootloader
  mov esi, 52 

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[DarrenChochian]

The choice of "best" memory locations depends on various factors. However, the configuration mentioned, with the bootloader in Programmable ROM (0xFFFFFFF0) and the kernel in RAM (0x00000000-0x3FFFFFFF), is a common and practical setup for X86 systems.