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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Major’s Pro Baseball use it. 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. As long as we’re on the subject of weird dtasheet in Game Gear carts, doesn’t some other baseball game have an extra sound chip or banked RAM in it too?

93c46b datasheet pdf

Fri Dec 24, 6: I’m not totally sure the start bit is necessary. Or did you see the code in a disassembly, but never actually called? Never heard about the extra sound chip, thought. Maybe it does a check for one kind of memory, and if that fails dqtasheet calls the other routine?


ROM now available for developer, as well as chipset documentation from www. Was it required for some game to work properly?

1K Microwire Compatible Serial EEPROM

The 93C46 datasheet indeed makes no mention of that darasheet the 93C46B one does. 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. Dataeheet Jun 15, Fri Jun 10, 5: Perhaps “B” type ones do have the feature? At any rate, I’ll post again with my findings if I make some progress.

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.

I think bit 1 of the same address might distinguish between a read or write operation, but that’s pure speculation. Fri Dec 24, 9: Just dtasheet of tedious bit-banging.


93C46 Datasheet

Bit 0 of is where the data is written to serially. Fri Jun 10, 2: Wed Jun 15, 7: Wed Jun 15, 9: Still need to verify if this is used by games. Everything will probably be cleared when I or you will implement actual emulation. Maybe a port is used, though I doubt it.

Just some ideas and observations. 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 and see if the commands sent follow any kind of logical order or not.

Forum Index Datasbeet 93c46 emulation. Thu Dec 23, World Series Baseball use the same chip too. I’m now restructuring the mappering system in Meka.

Sat Jun 11, 8: