christoph/lecture-operating-system-development
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merged cleanup

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This commit is contained in:
Christoph Urlacher
2022-07-24 21:12:31 +02:00
parent 5ff3d72bfd
commit 6481bae5f6
92 changed files with 663 additions and 755 deletions
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7
c_os/devices/PCSPK.cc
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@ -16,7 +16,6 @@
#include "kernel/Globals.h"
const IOport PCSPK::control(0x43);
const IOport PCSPK::data0(0x40);
const IOport PCSPK::data2(0x42);
const IOport PCSPK::ppi(0x61);
@ -29,7 +28,7 @@ const IOport PCSPK::ppi(0x61);
* len: Laenge des Tons in ms *
*****************************************************************************/
void PCSPK::play(float f, int len) {
int freq = (int)f;
int freq = static_cast<int>(f);
int cntStart = 1193180 / freq;
int status;
@ -39,7 +38,7 @@ void PCSPK::play(float f, int len) {
data2.outb(cntStart / 256); // Zaehler-2 laden (Hibyte)
// Lautsprecher einschalten
status = (int)ppi.inb(); // Status-Register des PPI auslesen
status = static_cast<int>(ppi.inb()); // Status-Register des PPI auslesen
ppi.outb(status | 3); // Lautpsrecher Einschalten
// Pause
@ -57,7 +56,7 @@ void PCSPK::play(float f, int len) {
void PCSPK::off() {
int status;
status = (int)ppi.inb(); // Status-Register des PPI auslesen
status = static_cast<int>(ppi.inb()); // Status-Register des PPI auslesen
ppi.outb((status >> 2) << 2); // Lautsprecher ausschalten
}