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/*
Copyright (c) 2021 Bad Diode
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE.
*/
#include <string.h>
#include <time.h>
#include "common.h"
#include "filesystem.c"
#include "uxn.c"
#include "ppu.c"
#include "apu.c"
#include "file.c"
#include "text.h"
#include "rom.c"
#include "config.c"
#include "profiling.c"
#include "devices.c"
#define STACK_SIZE 16
u8 stack[STACK_SIZE] = {0};
extern void uxn_eval_asm(u16 pc);
// TODO: This should be on the IWRAM for maximum speed, as these are operations
// we will use very often.
extern u8 wst[256];
extern u8 rst[256];
extern u8 io_ports[256];
extern uintptr_t wst_ptr;
extern uintptr_t rst_ptr;
EWRAM_BSS
u8 uxn_ram[KB(64) * 2];
void
init_uxn() {
// Initialize uxn.
u32 fill = 0;
dma_fill(uxn_ram, fill, 0x10300, 3);
// uxn_boot(u, uxn_ram, uxn_dei, uxn_deo);
// Copy rom to VM.
u8 uxn_rom[32] = {
// Hello world (h)
// 0x80, 0x68, 0x80, 0x18, 0x17,
//
// ADD test
// 0x80, 0x04, 0x80, 0x03, 0x80, 0x02, 0x80, 0x01, 0x18, 0x18
// SUB test
// 0x80, 0x04, 0x80, 0x03, 0x80, 0x02, 0x80, 0x01, 0x19, 0x19, 0x19
// LIT2 04 03 LIT2 02 01 ADD ADD ADD BRK
// 0xa0, 0x04, 0x03,
// 0xa0, 0x04, 0x03, 0xa0, 0x02, 0x01,
// 0xa0, 0x04, 0x03, 0xa0, 0x02, 0x01, 0x18, 0x18, 0x00
// #0004 #0008 ADD
// 0xa0, 0x00, 0x04, 0xa0, 0x00, 0x08, 0x18,
// #0004 #0008 ADD2
// 0x80, 0xFF, 0xff,
// 0xa0, 0x00, 0x08, 0xa0, 0x00, 0x04, 0x38,
// 0xa0, 0x00, 0x08, 0xa0, 0x00, 0x04, 0x38,
// 0xa0, 0x00, 0x08, 0xa0, 0x00, 0x03, 0x39,
// 0xa0, 0x00, 0x01, 0x38,
//
// 0x80, 0xFF, 0xff,
// 0xa0, 0xba, 0xdd,
// 0xa0, 0x10, 0xde,
// 0xa0, 0xfe, 0xed,
// 0xa0, 0xde, 0xaf,
// 0xa0, 0xba, 0xdd,
// 0xa0, 0x10, 0xde,
// 0xa0, 0xfe, 0xed,
// 0xa0, 0xde, 0xaf,
//
// #0008 #0003 SUB2
// 0xa0, 0x00, 0x08, 0xa0, 0x00, 0x03,
};
memcpy(uxn_ram + PAGE_PROGRAM, uxn_rom, sizeof(uxn_rom));
}
int
main(void) {
// Adjust system wait times.
SYSTEM_WAIT = SYSTEM_WAIT_CARTRIDGE;
// Initialize filesystem.
fs_init();
// Register interrupts.
irq_init();
irs_set(IRQ_VBLANK, sound_vsync);
// Initialize PPU.
video_init();
// Initialize text engine.
// #ifdef TEXT_ENABLE
txt_init(1, TEXT_LAYER);
txt_position(0,0);
// #endif
// Initialize UXN.
init_uxn();
// Enable sound.
init_sound();
// Main loop.
// uxn_eval(&u, PAGE_PROGRAM);
u8 frame_counter = 0;
// NOTE: A VBLANK is 83776 cycles, anything other than that will make it so
// we fail to render at 60FPS.
// TODO: Initialize memory.
// Initialize stack.
for (size_t i = 0; i < 256; i++) {
wst[i] = 0;
rst[i] = 0;
io_ports[i] = 0;
}
txt_printf("ROM\n\n");
for (size_t i = 0; i < 32; i++) {
if (i % 8 == 0) {
txt_printf("\n");
}
txt_printf("%02x ", uxn_ram[i + PAGE_PROGRAM]);
}
txt_printf("\n\n");
uxn_eval_asm(PAGE_PROGRAM);
txt_printf("STACK\n");
txt_printf("PTR: %d\n", wst_ptr - (uintptr_t)wst);
for (size_t i = 0; i < STACK_SIZE; i++) {
if (i % 8 == 0) {
txt_printf("\n");
}
txt_printf("%02x ", wst[i]);
}
uintptr_t stack_base = wst;
uintptr_t stack_size = wst_ptr - stack_base;
while(true) {
txt_position(0,0);
// bios_vblank_wait();
// FRAME_START();
// // PROF(handle_input(&u), input_cycles);
// // PROF(uxn_eval(&u, PEEK2(&u.dev[0x20])), eval_cycles);
// // PROF(sound_mix(), mix_cycles);
// // // TODO: allow configuration to do VSYNC at 15 or 30 fps to avoid too
// // // much memory copying on demanding uxn roms.
// // PROF_SHOW();
// // PROF(flipbuf(), flip_cycles);
// // frame_counter++;
// // if (frame_counter == 60) {
// // seconds++;
// // frame_counter = 0;
// // }
// FRAME_END();
bios_vblank_wait();
FRAME_START();
flipbuf();
// screen_fill(0);
// txt_printf("WST: 0x%08x\n", wst);
// txt_printf("PTR: 0x%08x\n", wst_ptr);
FRAME_END();
PROF_SHOW();
// txt_render();
// txt_clear();
}
return 0;
}
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