f256/f256lib/f256.c

/*
 *	Copyright (c) 2024 Scott Duensing, scott@kangaroopunch.com
 *
 *	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.
 */


#ifndef F256LIB_AMALGAMATED_BUILD
#include "f256.h"
#include "f_kernel.c"
#include "f_dma.c"
#include "f_math.c"
#include "f_random.c"
#include "f_text.c"
#include "f_bitmap.c"
#include "f_tile.c"
#include "f_graphics.c"
#include "f_sprite.c"
#include "f_file.c"
#include "f_platform.c"
#endif


void f256Init(void) {
	// Swap I/O page 0 into bank 6.  This is our normal state.
	POKE(MMU_IO_CTRL, MMU_IO_PAGE_0);

	POKE(VKY_MSTR_CTRL_0, 63); // Enable text and all graphics.

	POKE(MMU_MEM_CTRL, 0xb3);  // MLUT editing enabled, editing 3, 3 is active.

	// Set all memory slots to be CPU memory.
	POKE(MMU_MEM_BANK_0, 0);
	POKE(MMU_MEM_BANK_1, 1);
	POKE(MMU_MEM_BANK_2, 2);
	POKE(MMU_MEM_BANK_3, 3);
	POKE(MMU_MEM_BANK_4, 4);
	POKE(MMU_MEM_BANK_5, 5);
	//POKE(MMU_MEM_BANK_6, 6);  // Don't use this - it's for the micro kernel.
	//POKE(MMU_MEM_BANK_7, 7);  // Don't use this - it's for the micro kernel.

#ifndef WITHOUT_KERNEL
	kernelReset();
#endif
#ifndef WITHOUT_DMA
	dmaReset();
#endif
#ifndef WITHOUT_GRAPHICS
	graphicsReset();
#endif
#ifndef WITHOUT_TEXT
	textReset();
#endif
#ifndef WITHOUT_BITMAP
	bitmapReset();
#endif
#ifndef WITHOUT_TILE
	tileReset();
#endif
#ifndef WITHOUT_SPRITE
	spriteReset();
#endif
#ifndef WITHOUT_FILE
	fileReset();
#endif
#ifndef WITHOUT_RANDOM
	randomReset();
#endif
}


void f256Reset(void) {
	asm("sei");
	POKE(MMU_MEM_BANK_7, 7);
	POKE(0xD6A2, 0xDE);
	POKE(0xD6A3, 0xAD);
	POKE(0xD6A0, 0xF0);
	POKE(0xD6A0, 0x00);
	asm("JMP ($FFFC)");
}


byte FAR_PEEK(uint32_t address) {
	byte block;
	byte result;

	SWAP_IO_SETUP();

	block = address / EIGHTK;
	address &= 0x1FFF;  // Find offset into this block.
	POKE(SWAP_SLOT, block);
	result = PEEK(SWAP_ADDR + address);
	SWAP_RESTORE_SLOT();

	SWAP_IO_SHUTDOWN();

	return result;
}


uint16_t FAR_PEEKW(uint32_t address) {
	byte     block;
	uint16_t result;

	SWAP_IO_SETUP();

	block = address / EIGHTK;
	address &= 0x1FFF;  // Find offset into this block.
	POKE(SWAP_SLOT, block);
	result = PEEKW(SWAP_ADDR + address);
	SWAP_RESTORE_SLOT();

	SWAP_IO_SHUTDOWN();

	return result;
}


void *FAR_POINTER(uint32_t address) {
	// This only works if we use slot 5 and don't restore it after swapping.
#if SWAP_SLOT == MMU_MEM_BANK_5
	byte block;

	block = address / EIGHTK;
	address &= 0x1FFF;  // Find offset into this block.
	POKE(SWAP_SLOT, block);
	return (void *)address;
#else
	return 0;
#endif
}


void FAR_POKE(uint32_t address, byte value) {
	byte block;

	SWAP_IO_SETUP();

	block = address / EIGHTK;
	address &= 0x1FFF;  // Find offset into this block.
	POKE(SWAP_SLOT, block);
	POKE(SWAP_ADDR + address, value);
	SWAP_RESTORE_SLOT();

	SWAP_IO_SHUTDOWN();
}



void FAR_POKEW(uint32_t address, uint16_t value) {
	byte block;

	SWAP_IO_SETUP();

	block = address / EIGHTK;
	address &= 0x1FFF;  // Find offset into this block.
	POKE(SWAP_SLOT, block);
	POKEW(SWAP_ADDR + address, value);
	SWAP_RESTORE_SLOT();

	SWAP_IO_SHUTDOWN();
}


#ifndef WITHOUT_MAIN
#ifdef main
#undef main
#endif
int f256main(int argc, char *argv[]);
int main(void) {
	f256Init();
	f256main(kernelArgs->common.extlen / 2, (char **)kernelArgs->common.ext);
	f256Reset();
	return 0;
}
#define main f256main   // This one is needed if you build f256.c included with your code.
#endif