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Code: Select all

	MOV			EAX,			CR4				; Switch CR4 to EAX
	BTS			EAX,			5				; Enable CR4.PAE
	MOV			CR4,			EAX				; Switch Back
	
	MOV			EAX,			100000h			; Set CR3 to 100000h
	MOV			CR3,			EAX				; Switch EAX back to CR3
	
	XOR			EAX,			EAX				; EAX = Addr
	XOR			EBX,			EBX				; EBX = Storage
	XOR			ECX,			ECX				; ECX = Counter
	
	.LoopPD:
		MOV		EBX,			EAX				; Store EAX in EBX
		OR		EBX,			3				; Or it by 3 (Kernel Mode)
		MOV		[101000h+ECX],	EBX				; Assignment
		
		ADD		ECX,			4				; Increase the counter by a DD
		ADD		EAX,			4096			; Increase Address by 4KB
		CMP		ECX,			4096			; Compare to 4KB
		JL		.LoopPD							; Jump back if less
	
	XOR			EAX,			[101000h]		; EAX = Addr = [101000h]
	XOR			EBX,			EBX				; EBX = Storage
	XOR			ECX,			ECX				; ECX = Counter
	
	.LoopPT:
		MOV		EBX,			EAX				; Store EAX in EBX
		OR		EBX,			3				; Or it by 3
		MOV		[100000h+ECX],	EBX				; Assignment
		
		ADD		ECX,			4				; Increase the counter by a DD
		CMP		ECX,			4096			; Compare to 4KB
		JL		.LoopPT							; Jump back if less
	
	MOV			ECX,			0C0000080h		; Load ECX with the MSR
	RDMSR										; Must be used with ECX
	BTS			EAX,			8				; Set Bit 8 of ECX
	WRMSR										; Must be used with ECX		
	
	MOV			EAX,			CR0				; Switch CR0 to EAX
	BTS			EAX,			31				; Set Bit 31 of CR0
	MOV			CR0,			EAX				; Switch CR0 to EAX

Code: Select all

PUSH     RBP
MOV      RBP,     RSP
.
.
.
POP      RBP
RET

Code: Select all

CLS:
	PUSH		RBP
	MOV			RBP,			RSP

	XOR			RAX,			RAX
	MOV			AH,				[Attr]
	MOV			AL,				32
	MOV			EBX,			EAX
	SHL			EBX,			16
	OR			EAX,			EBX
	MOV			RBX,			RAX
	SHL			RBX,			32
	OR			RAX,			RBX
	XOR			RCX,			RCX

	.Clear:
		MOV		[TMem + RCX],	RAX
		ADD		RCX,			8
		CMP		RCX,			4000
		JL		.Clear
	
	POP			RBP
	RET