// // scsp // // The SCSP will initialize the internal registers, etc. for about 30µ sec // after the reset has been released. For this reason, access is not allowed // during the 30µ sec. // Before downloading anything, make sure to set MEM4MB bit to 1 and DAC18B // bit to 0 within the sound CPU (address) 10400H address. smpc.reg.COMREG = COMREG__SNDON; while (smpc.reg.OREG31 != 0b00000110) {} for (long i = 0; i < 807; i++) { asm volatile ("nop"); } // wait for (way) more than 30µs scsp.reg.common[0] = SCSP__0__MEM4MB | SCSP__0__DAC18B; u16 * m68k_main_start = (u16 *)&_binary_m68k_main_bin_start; u32 m68k_main_size = (u32)&_binary_m68k_main_bin_size; copy_16(m68k_main_start, &scsp.ram.u16[0], m68k_main_size); smpc.reg.COMREG = COMREG__SNDOFF; while (smpc.reg.OREG31 != 0b00000111) {} for (long i = 0; i < 807; i++) { asm volatile ("nop"); } // wait for (way) more than 30µs smpc.reg.COMREG = COMREG__SNDON; while (smpc.reg.OREG31 != 0b00000110) {} for (long i = 0; i < 807; i++) { asm volatile ("nop"); } // wait for (way) more than 30µs scsp.reg.common[0] = SCSP__0__MEM4MB | SCSP__0__DAC18B;