Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-05-20 04:39:11 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

(chip->rom_readback_addr++ - 1) was confusing. Also added infor on dsp-related regs

Browse Source
This commit is contained in:
Michaël Banaan Ananas 2011-08-16 09:32:58 +00:00
parent e4930bd300
commit de5f2f7c2f
1 changed files with 20 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
src/emu/sound/ymz280b.c
View File

@ -555,10 +555,10 @@ static STREAM_UPDATE( ymz280b_update )
switch (voice->mode)
{
case 1: samples_left = generate_adpcm(voice, chip->region_base, chip->scratch, new_samples); break;
case 2: samples_left = generate_pcm8(voice, chip->region_base, chip->scratch, new_samples); break;
case 2: samples_left = generate_pcm8(voice, chip->region_base, chip->scratch, new_samples); break;
case 3: samples_left = generate_pcm16(voice, chip->region_base, chip->scratch, new_samples); break;
default:
case 0: samples_left = 0; memset(chip->scratch, 0, new_samples * sizeof(chip->scratch[0])); break;
case 0: samples_left = 0; memset(chip->scratch, 0, new_samples * sizeof(chip->scratch[0])); break;
}
}
@ -823,6 +823,13 @@ static void write_to_register(ymz280b_state *chip, int data)
{
switch (chip->current_register)
{
/* DSP related (not implemented yet) */
case 0x80: // d0-2: DSP Rch, d3: enable Rch (0: yes, 1: no), d4-6: DSP Lch, d7: enable Lch (0: yes, 1: no)
case 0x81: // d0: enable control of $82 (0: yes, 1: no)
case 0x82: // DSP data
logerror("YMZ280B: DSP register write %02X = %02X\n", chip->current_register, data);
break;
case 0x84: /* ROM readback / RAM write (high) */
chip->rom_readback_addr &= 0xffff;
chip->rom_readback_addr |= (data<<16);
@ -843,6 +850,7 @@ static void write_to_register(ymz280b_state *chip, int data)
chip->ext_ram_write(chip->rom_readback_addr, data);
else
logerror("YMZ280B attempted RAM write to %X\n", chip->rom_readback_addr);
chip->rom_readback_addr = (chip->rom_readback_addr + 1) & 0xffffff;
break;
case 0xfe: /* IRQ mask */
@ -925,7 +933,11 @@ READ8_DEVICE_HANDLER( ymz280b_r )
ymz280b_state *chip = get_safe_token(device);
if ((offset & 1) == 0)
return chip->ext_ram_read(chip->rom_readback_addr++ - 1);
{
UINT8 read = chip->ext_ram_read.isnull() ? 0 : chip->ext_ram_read(chip->rom_readback_addr);
chip->rom_readback_addr = (chip->rom_readback_addr + 1) & 0xffffff;
return read;
}
else
return compute_status(chip);
}
@ -952,7 +964,7 @@ DEVICE_GET_INFO( ymz280b )
switch (state)
{
/* --- the following bits of info are returned as 64-bit signed integers --- */
case DEVINFO_INT_TOKEN_BYTES: info->i = sizeof(ymz280b_state); break;
case DEVINFO_INT_TOKEN_BYTES: info->i = sizeof(ymz280b_state); break;
/* --- the following bits of info are returned as pointers to data or functions --- */
case DEVINFO_FCT_START: info->start = DEVICE_START_NAME( ymz280b ); break;
@ -961,10 +973,10 @@ DEVICE_GET_INFO( ymz280b )
/* --- the following bits of info are returned as NULL-terminated strings --- */
case DEVINFO_STR_NAME: strcpy(info->s, "YMZ280B"); break;
case DEVINFO_STR_FAMILY: strcpy(info->s, "Yamaha Wavetable"); break;
case DEVINFO_STR_VERSION: strcpy(info->s, "1.0"); break;
case DEVINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break;
case DEVINFO_STR_CREDITS: strcpy(info->s, "Copyright Nicola Salmoria and the MAME Team"); break;
case DEVINFO_STR_FAMILY: strcpy(info->s, "Yamaha Wavetable"); break;
case DEVINFO_STR_VERSION: strcpy(info->s, "1.0"); break;
case DEVINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break;
case DEVINFO_STR_CREDITS: strcpy(info->s, "Copyright Nicola Salmoria and the MAME Team"); break;
}
}