%include "ponydos.inc"
cpu 8086
bits 16

; 0x0000
jmp near process_event

; 0x0003 PROC_INITIALIZE_ENTRYPOINT
; This needs to preserve ds
initialize:
	push ds

	call deallocate_own_memory

	pop ds
	retf

process_event:
	retf

deallocate_own_memory:
	push bx
	push cx
	push es

	mov bx, PONYDOS_SEG
	mov es, bx

	; Segment 0xn000 corresponds to slot n in the allocation table
	mov bx, cs
	mov cl, 12
	shr bx, cl

	mov byte [es:GLOBAL_MEMORY_ALLOCATION_MAP + bx], 0

	pop es
	pop cx
	pop bx
	ret