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cpu.c
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cpu.c
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/*
* Copyright (c) 2024 Mark Burkley.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Some support functions for Z80 CPU
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include "video.h"
#include "kbd.h"
#include "memmap.h"
#include "structs.h"
static void (*intVector) (void);
bool cpuPaused;
void interruptEnable ()
{
}
void interruptDisable()
{
}
void interruptMode (int mode)
{
}
void interruptHalt (void)
{
static bool inInterrupt;
/* TODO pend on cond var set by video or use a timer */
usleep(16667); // 60 Hz
if (!inInterrupt && !cpuPaused && intVector)
{
inInterrupt = true;
intVector();
}
inInterrupt = false;
printf ("sprite-at: ");
for (int i = 0; i < 16; i++)
printf ("%02x ", SPRITEATTRIB[i]);
printf ("\nsprite-co: ");
for (int i = 0; i < 16; i++)
printf ("%02x ", SPRITECOORDS[i]);
printf ("\nstmain=%d in=%d dem=%d cr=%d lv=%d s1=%d s2=%d s3=%d",
MAIN_STATE, RESET_STATE,
INTRO_STATE, CREDIT_STATE,
LEVEL_STATE,
SCENE1_STATE,
SCENE2_STATE,
SCENE3_STATE);
printf (" ghost=[%d,%d,%d,%d]",
BLINKY_STATE,
PINKY_STATE,
INKY_STATE,
CLYDE_STATE);
printf (" sub=[%d,%d,%d,%d]",
BLINKY_SUBSTATE,
PINKY_SUBSTATE,
INKY_SUBSTATE,
CLYDE_SUBSTATE);
printf (" p1l=%d p2l=%d two=%d\n",
P1_REAL_LIVES, P2_REAL_LIVES, TWO_PLAYERS);
printf ("pacman-tile %d,%d blinky-tile %d,%d\n",
PACMAN_TILE2.x,
PACMAN_TILE2.y,
BLINKY_TILE2.x,
BLINKY_TILE2.y);
printf ("\n\n=====\n");
}
void interruptVector (void (*func) (void))
{
intVector = func;
}
void kickWatchdog (void)
{
// usleep(50000);
}