User:Johnburger/Demo/BIOS/MemMap
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< User:Johnburger | Demo
The system needs to know where some things in memory are, and sometimes what values they have - or it needs to put them there.
To that end, I need symbols for various areas of the BIOS Memory Map.
Demo/BIOS/MemMap.inc
; ; BIOS/MemMap.inc ; ; This is the Memory Map of when the BIOS first boots. ; You'll notice that the Stack is on top of the Interrupt Vector Table! BIOS.Stack.Base EQU 0000h ; BIOS Boot stack BIOS.Stack.Size EQU 0400h BIOS.BDA.Base EQU 0400h ; BIOS Data Area BIOS.BDA.Size EQU 0100h BIOS.MBR.Base EQU 0600h ; BIOS Master Boot Record load area BIOS.MBR.Size EQU 0200h BIOS.Entry EQU 7C00h ; BIOS Boot Entry point BIOS.Sig.Value EQU 0AA55h ; BIOS Signature flag BIOS.Sig.Pos EQU BIOS.Disk.Sector.Size - 2