Use this board to adapt an original SNES Mask ROM pinout to accommodate 27C160 EPROMs - no desoldering required!Designed by The Poor Student Hobbyist in United States of America
What is it? This is a custom PC board I made that allows you to use the popular 27C160 EPROM with cartridge PCBs that use the original SNES Mask ROM pinout. The 27C160 is a 42-pin device, but the S...Read More…
This is a custom PC board I made that allows you to use the popular 27C160 EPROM with cartridge PCBs that use the original SNES Mask ROM pinout. The 27C160 is a 42-pin device, but the SNES EPROM socket is only 36 pins large, so this board redirects the larger device to fit on the smaller socket.
This board will work for nearly any SNES game up to 16 Mbit (2 MB). It fits nicely in the original SNES PCB without interference with the plastic case, when installed correctly.
You can use this board on an original SNES PCB without desoldering the original ROM from the cartridge - all you have to do is disable the original chip. Just clip the /OE pin on the original ROM and bridge the pin to VCC. See the link for more information on how to do this.
When put into the board properly, it fits nicely inside the cartridge. Note that it will not fit inside the cartridge with every existing SNES boards, but it will for most. There must be at least approximately 2 centimeters clearance to the top of the cartridge (see picture). In general, if your board only has one EPROM and SRAM chips, or two EPROMs and no SRAM, it should fit ok. I have had mixed results with boards that have 32-pin EPROM sockets. Try to stick to 36-pin boards. PLEASE CHECK if your adapter will fit before you solder anything! I have not personally encountered any problems but I do not have every type of board to test. If you are having problems, send me pictures, the board number, and we'll figure it out!
You may need to trim back "mousebites" on the PCB to fit the EPROM in the socket (see picture). Trim the backside pins on any chip that interferes with the board to ensure the adapter board is close to the donor. Try fitting it in the cartridge before soldering to be sure.
I might! Please contact me and if I don't have enough to fill your order, I will put out an order for more boards for you.
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