Konami Sound Cartridge
The Konami Sound Cartridge is supplied with the MSX video games Snatcher and SD Snatcher. Sometimes it is known as the SCC+. It includes a slightly improved Konami SCC sound chip and 64kB of volatile RAM. It is likely that the RAM was included since most MSX computers in Japan at the time of release had very little memory (mostly 64kB).
Like the normal SCC, the chip has 5 audio channels. The waveform is set by 32 bytes of 8 bit samples. Each channel has its own 32 bytes of waveform, unlike the SCC where channel 4 and 5 share the waveform.
The cartridge included with Snatcher is different than the one included with SD Snatcher, but only in memory layout. It was probably done to make it incompatible. Some MSX emulators emulate this cartridge, MESS and OpenMSX for example.
Most video games on the Konami Games Collections for the MSX can use the cartridge that is included with Snatcher for better sound. Apart from those the Sound Cartridge is not used by any other programs.
The print on the chip is: KONAMI 052539 SCC-I2312P001 JAPAN followed by a fabrication location/date number, like 8951EAI. The first two digits are the year, followed by the week. The letters after that are some location/lot code.
Read more about Konami Sound Cartridge: Expanding Memory, Using The Memory, Using The Sound Chip
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