SCC
This page was last modified 19:53, 9 May 2019 by Rderooy. Based on work by Mars2000you and Tfh and others.
SCC Logo.png

Contents

Introduction

Konami ROM cartridge with SCC chip (2212P003)

SCC stands for Sound Creative Chip, the meaning of the abreviation is mentioned in the Konami Software Club newsletter 3 of November 1987. It is a sound chip developed since about Feb. 1986 by Konami, in collaboration with Toshiba, and it was provided in some of their Mega-ROM modules and also as a separate cartridge for some of their disk games (see below). In addition the chip was also used in various Konami arcade systems.

An SCC chip provides 5 channels of wave table sound (not so soft and cute as the FM-PAC and MSX-Audio, but nice if used properly). Actually, the samples are only 32 bytes long (defining a wave form) and are repeated to get `real sounds'.

On the package of each Mega ROM game produced by Konami with SCC chip, you can read: "...new 8 voice polyphonic LSI Custom Sound Chip Mounted." 8 channels? The chip has only 5 channels, and the 3 other channels are provided by the standard PSG chip built into every MSX.

Technical info can be found here: http://bifi.msxnet.org/msxnet/tech/scc.html

The first game developed with SCC support was F-1 Spirit [1], although the first game released with SCC in Europe was Nemesis 2, which was in fact developed after F-1 Spirit.

Konami Games with SCC

The following Konami MSX cartridge games contain the SCC chip:

Product Generation Description Region
RC 751 MSX1 Nemesis 2 JP, Europe
RC 752 MSX1 F-1 Spirit, The Way to Formula 1 JP, Europe
RC 756 MSX2 Break Shot Unreleased
RC 757 MSX2 Pennant Race JP
RC 758 MSX1 Salamander JP, Europe
RC 759 MSX1 Parodius JP
RC 760 MSX1 King's Valley 2 JP, Europe
RC 761 MSX2 King's Valley 2 JP
MSX2 King's Valley 2 - Contest edition JP
RC 762 MSX2 Contra (a.k.a. Gryzor) JP
RC 764 MSX1 Nemesis 3 JP, Europe
RC 766 MSX2 Pennant Race 2 JP
RC 767 MSX2 Metal Gear 2: Solid Snake JP
RC 768 MSX2 Space Manbow JP
RC 769 MSX2 Quarth JP

SCC-I

Snatcher Sound Cartridge RA-004

The SCC-I, commonly referred to as SCC+, is an improved version of the SCC. In a normal SCC, the 4th and 5th channel share the same wave form. In the SCC-I the 5th channel can have its own wave form.

Snatcher older PCB back side
Snatcher newer PCB back side

It seems that there are two versions of the PCB: an older version with a wire on the back and a newer version PCB without it. Probably because the SCC-I could not address 128kB with the older PCB. More information about the SCC-I can be found here: http://bifi.msxnet.org/msxnet/tech/soundcartridge.html

Snatcher original PCB with 64kB
Snatcher expanded PCB with 128kB

The SCC-I is only available in the Konami Sound Cartridge, which comes with the Konami games Snatcher and SD Snatcher. These cartridges also contain 64kB of RAM (which can be expanded to 128kB). The cartridge that comes with Snatcher is normally not compatible with the one that comes with SD-Snatcher: the RAM banks are on a different locations. With the memory expansion they become compatible, such that the Snatcher Sound Cartridge can be used with SD Snatcher and vice versa.

Here is the complete list of Konami games which include the SCC-I Sound Cartridge:

Product Generation Released Description Media Region
RA 004 MSX2 1988 Snatcher - Cyberpunk Adventure 3×720kB disk and Sound Cartridge JP
RA 011 MSX2 1990 Super Deform Snatcher 3×720kB disk and Sound Cartridge JP


In addition, Konami released a selection of Game Collection disks, which are optionally able to use the SCC-I sound cartridge from Snatcher for enhanced sound. These games are not compatible with the sound cartridge from SD Snatcher.

Product Generation Released Description Media Region
RA 006 MSX1 1988 Konami Game Collection 1 2x720kB disk JP
RA 007 MSX1 1988 Konami Game Collection 2 1x720kB disk JP
RA 008 MSX1 1988 Konami Game Collection 3 1x720kB disk JP
RA 009 MSX1 1988 Konami Game Collection 4 1x720kB disk JP
RA 010 MSX1/2 1989 Konami Game Collection Special 1x720kB disk JP

Using an SCC cartridge for other software than the game it comes with

Playing other Konami games

Due to the massive cracking and copying of Mega ROMs it was possible to have only one cartridge with SCC sound chip and all the other games on disks. This required of course that you had enough RAM in your MSX2 machine to load those ROMs. To disable the game ROM in the cartridge, it was recommended to cut one of the game ROM's pins or make a kind of switch. Technical info is here: http://bifi.msxnet.org/msxnet/tech/switch.html

Later a separate SCC cartridge was made by the Japanese group ESE: the ESE SCC, based on a real Konami game, though. But of course also the separate SCC-I cartridges that came with Snatcher and SD Snatcher can be used.

Recently, Manuel Pazos got hold of a large quantity of real Konami SCC chips and put them on a cartridge, together with some flash ROM. The result: MSX Cartridge Shop MegaFlashROM. An SCC cartridge in which you can load any ROM and then play it as an SCC game. This cartridge was later followed by a SCC+ version, the MegaFlashROM SCC+

Using the SCC with other programs

There are various (old) disk magazines/demo/music disks, games and even sound composer programs that can use the SCC chip.

Here are some of them:

SCC emulation

The following modern FPGA based MSX systems, can emulate the SCC

The following expansion cartridges can emulate the SCC

References

  1. http://junkerhq.net/Snatcher/JointDisk/linernotes.html