The Microchip Technology Inc. 93C46B is a 1K-bit, low-voltage serial Electrically Erasable PROM. The device memory is configured as 64 x 16 bits. Advanced. 93C46B datasheet, 93C46B circuit, 93C46B data sheet: MICROCHIP – 1K Microwire Compatible Serial EEPROM,alldatasheet, datasheet, Datasheet search. 93C46B datasheet, 93C46B circuit, 93C46B data sheet: MICROCHIP – 1K V Microwire Serial EEPROM,alldatasheet, datasheet, Datasheet search site for.

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93c46b datasheet pdf

Forum Index Development 93c46 emulation. As long as we’re on datawheet subject of weird stuff in Game Gear carts, doesn’t some other baseball game have an extra sound chip or banked RAM in it too? Just lot of tedious bit-banging. Still need to verify if this is used by games.

Wed Jun 15, 9: For the MW games they check their own header to determine the type of backup device and call the appropriate code, so without modifying the header the other backup routines are never called.


Wed Jun 15, I think bit 1 of the same address might distinguish between a read or write operation, but that’s pure speculation.

Fri Jun 10, 2: The 93C46 datasheet indeed makes no mention of that but the 93C46B one does. I could be wrong about what bits of do what, but it would be pretty easy to test this by looking at a debug log datashert see if the commands sent follow any kind of logical order or not.

Just some ideas and observations. Or did you see the code in a disassembly, but never actually called?


Fri Dec 24, 6: Was it required for some game to work properly? I’m now restructuring the mappering system in Meka. Quote 1 At the end of a READ sequence last cyclethe current word address is incremented so that next cycles would actually read the next word in memory array.

Everything will probably be cleared when I or you will implement actual emulation. Sat Jun 11, 8: Thu Dec 23, I’m not totally sure the start bit is necessary. Maybe a port is used, though I doubt it. Never heard datashwet the extra sound chip, thought. Major’s Pro Baseball use it.


Maybe it does a check for one kind of memory, and if that fails it calls the other routine? The idea behind emulating this is that you wait until 9 bits have been written to 1 start bit, 2 command bits, 6 address bitsthen figure out what operation the EEPROM is supposed to carry out based on the data.

ROM now dztasheet for developer, as well as chipset documentation from www.

World Series Baseball use the same chip too. Fri Jun 10, 5: Fri Dec 24, 9: Wed Jun 15, 7: Perhaps “B” type ones do have the feature? Datashedt 0 of is where the data is written to serially. At any rate, I’ll post again with my findings if I make some progress.