added comments

1 files changed, 12 insertions, 0 deletions

diff --git a/hardware.c b/hardware.c
index 846a390..9f56847 100644
--- a/hardware.c
+++ b/hardware.c
@@ -1,8 +1,15 @@
+// Thanks to SimonLothar, cfxm and all the other hackers!

+

 #include "global.h"

 #include "hardware.h"

 

+// here are some functions for direct hardware access

+// they are splitted to support different calculators

+

 char *vram, *vram2;

 

+// backlight funcions: on, off, switch, check

+// if it's unknown hardware we should do nothing

 void BacklightOn()

 {

 	if(!IsEmulator)

@@ -59,6 +66,7 @@ int BacklightIsOn()
 	}

 }

 

+// change contrast only for known calcs

 void set_contrast(int contrast)

 {

 	if(!getCalc() == UNKNOWN && !IsEmulator)

@@ -69,6 +77,7 @@ void set_contrast(int contrast)
 	}

 }

 

+// update the display, if secure; otherwise use syscalls (sloooow!)

 void display_vram()

 {

 	if(getCalc() == UNKNOWN && !IsEmulator)

@@ -92,6 +101,7 @@ void display_vram()
 	}

 }

 

+// clear video ram

 void clear_vram()

 {

 	int i, end;

@@ -108,6 +118,7 @@ void clear_vram()
 	for(i=0 ; i<end ; i++) pointer_byte[i] = 0;

 }

 

+// if possible, let it restart after going to the main menu

 short*APP_EnableRestart()

 {

 	if(getCalc() != UNKNOWN && !IsEmulator)

@@ -135,6 +146,7 @@ short*APP_EnableRestart()
 	return NULL;

 }

 

+// return the model

 int getCalc(void)

 {

 	static int hardware = UNKNOWN;