reboot

go32bit.nasm

@@ -274,9 +274,19 @@ DrawBG:
 
 	; eax now = x^2 + y^2
 
-	imul eax, 7
+	mov ebx, [Zoom]
+	sar ebx, 8
+	imul eax, ebx
 
 	mov ebx, [ColorOffset]
+	shr ebx, 8
+	mov bh, bl
+	add ax, bx
+	and ah, 0x7f
+
+	; mov bh, al
+
+	stosw
 
 	; sar ebx, 8
 
@@ -296,8 +306,6 @@ DrawBG:
 	; pop edx
 	; pop eax
 
-	add ax, bx
-	stosw
 
 	inc ecx
 	cmp ecx, 80
@@ -325,6 +333,8 @@ WriteProtectedModeString:
 	; je .ThereWasNothing
 	; cmp al, 0xB6			; Right Shift Break
 	; je .ThereWasNothing
+	cmp al, 0x01
+	je .KeyEscape
 	cmp al, 0x4b; left
 	je .KeyLeft
 	cmp al, 0x48; up
@@ -333,6 +343,10 @@ WriteProtectedModeString:
 	je .KeyDown
 	cmp al, 0x4d; down
 	je .KeyRight
+	cmp al, 0x33; <
+	je .KeyLess
+	cmp al, 0x34; >
+	je .KeyGreater
 	; test al, 0x80
 	; je .ThereWasSomething
 .ThereWasNothing:
@@ -340,6 +354,9 @@ WriteProtectedModeString:
 	jmp .PrintKeyLegend
 	; lea esi, [ProtectedWelcomeStr]
 
+.KeyEscape:
+	call Reboot
+	jmp .PrintKeyLegend
 
 .KeyLeft:
 	mov [Key], byte 'L'
@@ -356,6 +373,14 @@ WriteProtectedModeString:
 .KeyDown:
 	mov [Key], byte 'D'
 	add [Py], dword 1
+	jmp .PrintKeyLegend
+.KeyLess:
+	mov [Key], byte '<'
+	add [Zoom], dword -1
+	jmp .PrintKeyLegend
+.KeyGreater:
+	mov [Key], byte '>'
+	add [Zoom], dword 1
 .PrintKeyLegend:
 	lea esi, [ThereWasSomethingStr]
 
@@ -377,12 +402,17 @@ WriteProtectedModeString:
 	rep stosw
 	lea edi, [VIDEO + (80*24 + 1)*2]
 	mov eax, dword [Px]
-	sar eax, 6
+	sar eax, 4
 	call StringifyEax10
 
-	lea edi, [VIDEO + (80*24 + 10)*2]
+	lea edi, [VIDEO + (80*24 + 11)*2]
 	mov eax, dword [Py]
-	sar eax, 6
+	sar eax, 4
+	call StringifyEax10
+
+	lea edi, [VIDEO + (80*24 + 21)*2]
+	mov eax, dword [Zoom]
+	sar eax, 8
 	call StringifyEax10
 
 	add [ColorOffset], dword 1
@@ -449,6 +479,15 @@ StringifyEax10:
 .sign db ' '
 
 
+; ------------------------------------------------------------------------------
+Reboot:
+	in al, 0x64
+	test al, 00000010b              ; Wait for an empty Input Buffer
+	jne Reboot
+	mov al, 0xFE
+	out 0x64, al                    ; Send the reboot call to the keyboard controller
+	jmp Reboot
+
 ;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Strings
 ;;;;;;;;;;;;;;;;;;;;;;;;
@@ -458,4 +497,5 @@ StringifyEax10:
 	Px: dd 0
 	Py: dd 0
 	ColorOffset: dw 0
+	Zoom: dw 1
 align 512