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Added a mii_cycle_t type

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Instead of using the sub-standard __int128

Signed-off-by: Michel Pollet <buserror@gmail.com>
This commit is contained in:
Michel Pollet 2023-10-28 16:57:04 +01:00
parent af6ff70155
commit cdca612df2
5 changed files with 31 additions and 15 deletions
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6
src/mii.h
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@ -10,6 +10,7 @@
#include <stdint.h>
#include <stdbool.h>
#include "mii_types.h"
#include "mii_65c02.h"
#include "mii_dd.h"
#include "mii_bank.h"
@ -17,6 +18,7 @@
#include "mii_video.h"
#include "mii_speaker.h"
#include "mii_mouse.h"
#include "mii_analog.h"
enum {
MII_BANK_MAIN = 0, // main 48K address space
@ -76,12 +78,13 @@ typedef struct mii_trace_t {
uint32_t step_inst;
} mii_trace_t;
/*
* principal emulator state, for a faceless emulation
*/
typedef struct mii_t {
unsigned int state;
__uint128_t cycles;
mii_cycles_t cycles;
/* this is the video frame/VBL rate vs 60hz, default to 1.0 */
float speed;
float speed_current; // calculated speed
@ -121,6 +124,7 @@ typedef struct mii_t {
mii_speaker_t speaker;
mii_mouse_t mouse;
mii_dd_system_t dd;
mii_analog_t analog;
} mii_t;
enum {

2
src/mii_speaker.c
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@ -156,7 +156,7 @@ mii_speaker_click(
// if we've gone past the end of the frame, switch to the next one
if (sample_index >= s->fsize) {
sample_index = sample_index % s->fsize;
__uint128_t newstart = s->mii->cycles - (sample_index * s->clk_per_sample);
mii_cycles_t newstart = s->mii->cycles - (sample_index * s->clk_per_sample);
s->findex = (s->findex + 1) % MII_SPEAKER_FRAME_COUNT;
f = &s->frame[s->findex];
f->start = newstart;

2
src/mii_speaker.h
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@ -17,7 +17,7 @@ struct snd_pcm_t;
typedef int16_t mii_audio_sample_t;
typedef struct mii_audio_frame_t {
__uint128_t start;
mii_cycles_t start;
uint16_t fill;
mii_audio_sample_t * audio;
} mii_audio_frame_t;

14
src/mii_types.h Normal file
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@ -0,0 +1,14 @@
/*
* mii_types.h
*
* Copyright (C) 2023 Michel Pollet <buserror@gmail.com>
*
* SPDX-License-Identifier: MIT
*/
#pragma once
#include <stdbool.h>
#include <stdint.h>
typedef __uint128_t mii_cycles_t;

6
src/mii_video.h
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@ -8,9 +8,7 @@
#pragma once
#include <stdbool.h>
#include <stdint.h>
#include "mii_types.h"
// TODO move VRAM stuff to somewhere else
/*
@ -35,7 +33,7 @@ typedef struct mii_video_t {
void * state; // protothread state in mii_video.c
uint8_t line; // current line
bool vbl_irq; // VBL IRQ emabled (set by mouse card)
__uint128_t wait; // 'wait until' cycle marker
mii_cycles_t wait; // 'wait until' cycle marker
uint32_t pixels[MII_VRAM_WIDTH * MII_VRAM_HEIGHT];
uint32_t frame_count; // incremented every frame
uint32_t frame_drawn;