Nice device Richard! Could you write a little more detail so we could reproduce this unit?
Hans ----- Original Message ----- From: "Richard Atkinson" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, February 28, 2002 22:34 Subject: 4Mbit Flash SCC cartridge Re: Konami SCC pinout > On Thu, 28 Feb 2002, Sean Young wrote: > > > On Wed, Feb 27, 2002 at 04:08:49PM +0000, Richard Atkinson wrote: > > > Does anyone have the pinout of the Konami SCC chip, 2212P003 ? I'm trying > > > to modify my cartridge to accept an AMD 4Mbit Flash ROM, but I realised I > > > don't know where A17 and A18 are. Perhaps someone with a 256K or 512K game > > > could trace the connections to those address lines on the ROM socket? > > > > http://www.msxnet.org/tech/pinouts.txt > > Thanks very much for an excellent resource, Sean. Using this information, > I made a switchable 4Mbit Flash ROM SCC cartridge using an old King's > Valley II PCB. The result can be seen at: > > http://student.cusu.cam.ac.uk/~rga24/pics/msx/sccflash.jpg > > It uses two three-position switches for 7 useful permutations and can run > 1Mbit, 2Mbit and 4Mbit games at the appropriate boundaries. I have written > three Flash ROMs and demonstrated 8 Konami games running on my French > NMS8245 setup. The switch positions are as follows: > > A18 A17 > > SCC SCC Run 4Mbit game at 00000h > 0 SCC Run 2Mbit game at 00000h > 1 SCC Run 2Mbit game at 40000h > 0 0 Run 1Mbit game at 00000h > 0 1 Run 1Mbit game at 20000h > 1 0 Run 1Mbit game at 40000h > 1 1 Run 1Mbit game at 60000h > > (for the curious, SCC is switch left as in the photo, 0 is switch right > and 1 is switch centre) > > I have been thinking about adding a ROM disable switch to this cartridge > so it can be used with RAM software without removing the Flash ROM, and > also installing a ZIF socket. > > Many thanks to Sean and all those on #msx who helped me with this mod. > > > Richard > > -- > For info, see http://www.stack.nl/~wynke/MSX/listinfo.html > -- For info, see http://www.stack.nl/~wynke/MSX/listinfo.html
