// license:GPL-2.0+ // copyright-holders:Fabio Priuli, byuu, Nach /*************************************************************************** snescx4.c File to handle emulation of the SNES "CX4" add-on chip. Code based on original work by zsKnight, anomie and Nach. This implementation is based on C++ "cx4*.cpp" by byuu (up to date with source v 0.49). ***************************************************************************/ #include "emu.h" #include "machine/snescx4.h" static CX4 cx4; static uint16_t CX4_readw(uint16_t addr); static uint32_t CX4_readl(uint16_t addr); static void CX4_writew(running_machine &machine, uint16_t addr, uint16_t data); //static void CX4_writel(running_machine &machine, uint16_t addr, uint32_t data); static void CX4_C4DrawLine(int32_t X1, int32_t Y1, int16_t Z1, int32_t X2, int32_t Y2, int16_t Z2, uint8_t Color); #include "machine/cx4data.hxx" #include "machine/cx4fn.hxx" static uint32_t CX4_ldr(uint8_t r) { uint16_t addr = 0x0080 + (r * 3); return (cx4.reg[addr + 0] << 0) | (cx4.reg[addr + 1] << 8) | (cx4.reg[addr + 2] << 16); } static void CX4_str(uint8_t r, uint32_t data) { uint16_t addr = 0x0080 + (r * 3); cx4.reg[addr + 0] = (data >> 0); cx4.reg[addr + 1] = (data >> 8); cx4.reg[addr + 2] = (data >> 16); } static void CX4_mul(uint32_t x, uint32_t y, uint32_t *rl, uint32_t *rh) { int64_t rx = x & 0xffffff; int64_t ry = y & 0xffffff; if(rx & 0x800000)rx |= ~0x7fffff; if(ry & 0x800000)ry |= ~0x7fffff; rx *= ry; *rl = (rx) & 0xffffff; *rh = (rx >> 24) & 0xffffff; } static uint32_t CX4_sin(uint32_t rx) { cx4.r0 = rx & 0x1ff; if(cx4.r0 & 0x100) { cx4.r0 ^= 0x1ff; } if(cx4.r0 & 0x080) { cx4.r0 ^= 0x0ff; } if(rx & 0x100) { return CX4_sin_table[cx4.r0 + 0x80]; } else { return CX4_sin_table[cx4.r0]; } } static uint32_t CX4_cos(uint32_t rx) { return CX4_sin(rx + 0x080); } static void CX4_immediate_reg(uint32_t start) { uint32_t i = 0; cx4.r0 = CX4_ldr(0); for(i = start; i < 48; i++) { if((cx4.r0 & 0x0fff) < 0x0c00) { cx4.ram[cx4.r0 & 0x0fff] = CX4_immediate_data[i]; } cx4.r0++; } CX4_str(0, cx4.r0); } static void CX4_transfer_data(running_machine &machine) { uint32_t src; uint16_t dest, count; uint32_t i; src = (cx4.reg[0x40]) | (cx4.reg[0x41] << 8) | (cx4.reg[0x42] << 16); count = (cx4.reg[0x43]) | (cx4.reg[0x44] << 8); dest = (cx4.reg[0x45]) | (cx4.reg[0x46] << 8); address_space &space = machine.device("maincpu")->space(AS_PROGRAM); for(i=0;i> 2; return; } switch(data) { case 0x00: CX4_op00(machine); break; case 0x01: CX4_op01(machine); break; case 0x05: CX4_op05(machine); break; case 0x0d: CX4_op0d(machine); break; case 0x10: CX4_op10(); break; case 0x13: CX4_op13(); break; case 0x15: CX4_op15(machine); break; case 0x1f: CX4_op1f(machine); break; case 0x22: CX4_op22(); break; case 0x25: CX4_op25(); break; case 0x2d: CX4_op2d(machine); break; case 0x40: CX4_op40(); break; case 0x54: CX4_op54(); break; case 0x5c: CX4_op5c(); break; case 0x5e: CX4_op5e(); break; case 0x60: CX4_op60(); break; case 0x62: CX4_op62(); break; case 0x64: CX4_op64(); break; case 0x66: CX4_op66(); break; case 0x68: CX4_op68(); break; case 0x6a: CX4_op6a(); break; case 0x6c: CX4_op6c(); break; case 0x6e: CX4_op6e(); break; case 0x70: CX4_op70(); break; case 0x72: CX4_op72(); break; case 0x74: CX4_op74(); break; case 0x76: CX4_op76(); break; case 0x78: CX4_op78(); break; case 0x7a: CX4_op7a(); break; case 0x7c: CX4_op7c(); break; case 0x89: CX4_op89(); break; } } } #ifdef UNUSED_FUNCTION void CX4_writeb(running_machine &machine, uint16_t addr, uint8_t data) { CX4_write(machine, addr, data); } #endif static void CX4_writew(running_machine &machine, uint16_t addr, uint16_t data) { CX4_write(machine, addr + 0, data >> 0); CX4_write(machine, addr + 1, data >> 8); } #ifdef UNUSED_FUNCTION void CX4_writel(running_machine &machine, uint16_t addr, uint32_t data) { CX4_write(machine, addr + 0, data >> 0); CX4_write(machine, addr + 1, data >> 8); CX4_write(machine, addr + 2, data >> 16); } #endif uint8_t CX4_read(uint32_t addr) { addr &= 0x1fff; if(addr < 0x0c00) { return cx4.ram[addr]; } if(addr >= 0x1f00) { return cx4.reg[addr & 0xff]; } return 0xff; } #ifdef UNUSED_FUNCTION uint8_t CX4_readb(uint16_t addr) { return CX4_read(addr); } #endif static uint16_t CX4_readw(uint16_t addr) { return CX4_read(addr) | (CX4_read(addr + 1) << 8); } static uint32_t CX4_readl(uint16_t addr) { return CX4_read(addr) | (CX4_read(addr + 1) << 8) | (CX4_read(addr + 2) << 16); } #ifdef UNUSED_FUNCTION void CX4_reset() { memset(cx4.ram, 0, 0x0c00); memset(cx4.reg, 0, 0x0100); } #endif