mirror of
https://github.com/isometimes/rpi4-osdev
synced 2024-09-19 13:32:56 +00:00
111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
#include "include/wgt.h"
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#include "include/mb.h"
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// ######## REQUIRED FUNCTIONS ########
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unsigned long state0 = 1000;
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unsigned long state1 = 2000;
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unsigned long rand(void)
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{
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unsigned long s1 = state0;
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unsigned long s0 = state1;
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state0 = s0;
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s1 ^= s1 << 23;
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s1 ^= s1 >> 17;
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s1 ^= s0;
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s1 ^= s0 >> 26;
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state1 = s1;
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return state0 + state1;
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}
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// ######## STUB FUNCTIONS ########
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unsigned int kb = 0;
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unsigned int kbhit(void) {
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kb++;
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return kb / 15000;
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}
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void getch(void) {
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wait_msec(0x500000);
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kb = 0;
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}
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// ######## WGT EXAMPLES ########
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#define TIMERSPEED 60 /* timer_routine is called 60 times per second */
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int timer; /* Counts how many times it has been called */
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int clearcount; /* Counts the number of screen clears. */
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extern int get_el(void);
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void timer_routine (void)
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{
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timer++;
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}
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void wgt03()
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{
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vga256 (); /* Initialize WGT system */
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debugstr ("WGT Example #3"); debugcrlf(); debugcrlf();
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debugstr ("This program will use the wcls routine"); debugcrlf();
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debugstr ("to clear the screen using random"); debugcrlf();
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debugstr ("colors as fast as it can until you"); debugcrlf();
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debugstr ("press a key."); debugcrlf(); debugcrlf();
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debugstr ("It will then report the highest frame"); debugcrlf();
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debugstr ("rate possible on your computer."); debugcrlf(); debugcrlf(); debugcrlf();
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int el = get_el();
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debugstr("Exception level: "); debughex(el); debugcrlf();
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int setter = set_clock_rate(get_max_clock());
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debugstr("Set clock returned "); debughex(setter); debugcrlf(); debugcrlf(); debugcrlf();
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debugstr ("Press any key to continue.");
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getch ();
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clearcount = 0;
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timer = 0;
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winittimer ();
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wstarttimer (timer_routine, TIMERSPEED);
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debugreset();
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while (!kbhit ())
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{
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wcls(vgapal[rand() % 256]); /* Clear with random color out of 256 */
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clearcount++;
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}
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wstoptimer ();
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wdonetimer ();
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getch ();
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wcls(vgapal[0]);
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int clock = get_clock_rate();
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debugstr("Clock rate: "); debughex(clock); debugcrlf();
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int maxclock = get_max_clock();
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debugstr("Max clock rate: "); debughex(maxclock); debugcrlf();
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unsigned int fps = clearcount / (timer / TIMERSPEED);
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debughex(fps); debugstr("frames per second"); debugcrlf(); debugcrlf(); debugcrlf();
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debugstr ("This is the highest frame rate your"); debugcrlf();
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debugstr ("computer can produce for full screen"); debugcrlf();
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debugstr ("animation.");
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}
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void main()
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{
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wgt03();
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while (1);
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}
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