christoph/lecture-operating-system-development
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initial reformat, still has misformats

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This commit is contained in:
churl
2022-04-25 14:24:56 +02:00
parent 67fce9ff2d
commit 263563c105
20 changed files with 295 additions and 317 deletions
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41
c_os/devices/CGA.cc
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@ -13,13 +13,12 @@
*****************************************************************************/
#include "devices/CGA.h"
/*****************************************************************************
* Methode: CGA::setpos *
*---------------------------------------------------------------------------*
* Beschreibung: Setzen des Cursors in Spalte x und Zeile y. *
*****************************************************************************/
void CGA::setpos (int x, int y) {
void CGA::setpos(int x, int y) {
/* Hier muess Code eingefuegt werden */
@ -28,15 +27,13 @@ void CGA::setpos (int x, int y) {
unsigned char cursor_low = pos & 0xFF;
unsigned char cursor_high = (pos >> 8) & 0xFF;
index_port.outb(0xF); // Cursor(low)
index_port.outb(0xF); // Cursor(low)
data_port.outb(cursor_low);
index_port.outb(0xE); // Cursor(high)
index_port.outb(0xE); // Cursor(high)
data_port.outb(cursor_high);
}
/*****************************************************************************
* Methode: CGA::getpos *
*---------------------------------------------------------------------------*
@ -44,26 +41,23 @@ void CGA::setpos (int x, int y) {
* *
* Rückgabewerte: x und y *
*****************************************************************************/
void CGA::getpos (int &x, int &y) {
void CGA::getpos(int& x, int& y) {
/* Hier muess Code eingefuegt werden */
index_port.outb(0xF); // Cursor(low)
index_port.outb(0xF); // Cursor(low)
unsigned char cursor_low = data_port.inb();
index_port.outb(0xE); // Cursor(high)
index_port.outb(0xE); // Cursor(high)
unsigned char cursor_high = data_port.inb();
unsigned short cursor =
(cursor_low & 0xFF)
| ((cursor_high << 8) & 0xFF00);
(cursor_low & 0xFF) | ((cursor_high << 8) & 0xFF00);
x = cursor % 80;
y = (int)(cursor / 80);
}
/*****************************************************************************
* Methode: CGA::show *
*---------------------------------------------------------------------------*
@ -75,19 +69,17 @@ void CGA::getpos (int &x, int &y) {
* character Das auszugebende Zeichen *
* attrib Attributbyte fuer das Zeichen *
*****************************************************************************/
void CGA::show (int x, int y, char character, unsigned char attrib) {
void CGA::show(int x, int y, char character, unsigned char attrib) {
/* Hier muess Code eingefuegt werden */
char* pos = (char*)(CGA_START + 2 * (x + y * 80)); // cast to char* to make writable
char* pos = (char*)(CGA_START + 2 * (x + y * 80)); // cast to char* to make writable
*pos = character;
*(pos + 1) = attrib;
// TODO: screen border check
}
/*****************************************************************************
* Methode: CGA::print *
*---------------------------------------------------------------------------*
@ -99,7 +91,7 @@ void CGA::show (int x, int y, char character, unsigned char attrib) {
* n Laenger der Zeichenkette *
* attrib Attributbyte fuer alle Zeichen der Zeichenkette *
*****************************************************************************/
void CGA::print (char* string, int n, unsigned char attrib) {
void CGA::print(char* string, int n, unsigned char attrib) {
/* Hier muess Code eingefuegt werden */
@ -126,10 +118,8 @@ void CGA::print (char* string, int n, unsigned char attrib) {
// TODO: automatic line breaking, automatic scrolling
// TODO: printing doesn't work after first newline character
}
/*****************************************************************************
* Methode: CGA::scrollup *
*---------------------------------------------------------------------------*
@ -137,7 +127,7 @@ void CGA::print (char* string, int n, unsigned char attrib) {
* Die neue Zeile am unteren Bildrand wird mit Leerzeichen *
* gefuellt. *
*****************************************************************************/
void CGA::scrollup () {
void CGA::scrollup() {
/* Hier muess Code eingefuegt werden */
@ -150,16 +140,14 @@ void CGA::scrollup () {
for (unsigned short byte = 2 * 80 * 24; byte < 2 * 80 * 25; ++byte) {
*((char*)(CGA_START + byte)) = '\0';
}
}
/*****************************************************************************
* Methode: CGA::clear *
*---------------------------------------------------------------------------*
* Beschreibung: Lösche den Textbildschirm. *
*****************************************************************************/
void CGA::clear () {
void CGA::clear() {
/* Hier muess Code eingefuegt werden */
@ -168,10 +156,8 @@ void CGA::clear () {
}
this->setpos(0, 0);
}
/*****************************************************************************
* Methode: CGA::attribute *
*---------------------------------------------------------------------------*
@ -184,8 +170,7 @@ void CGA::clear () {
* fg Foreground color *
* blink ywa/no *
*****************************************************************************/
unsigned char CGA::attribute (CGA::color bg, CGA::color fg, bool blink) {
unsigned char CGA::attribute(CGA::color bg, CGA::color fg, bool blink) {
/* Hier muess Code eingefuegt werden */
}