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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At any rate, I’ll post again with my findings if I make some progress.
I’m not totally dataseet the start bit is necessary. World Series Baseball use the same chip too. 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. Everything will probably be cleared when I or you will implement actual emulation. Maybe it does a check for one kind of memory, and if that fails it calls the other routine?
Wed Jun 15, 7: Major’s Pro Baseball use it.
93c46b datasheet pdf storage
Bit 0 of is where the data is written to serially. Sat Jun 11, 8: 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. Fri Dec 24, 9: Fri Jun 10, 5: I’m now restructuring the mappering system in Meka. Wed Jun 15, 9: As long as we’re on the 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?
Perhaps “B” type ones do have the feature? Never heard about the extra sound chip, thought. 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.
Was it required for some game to work properly? Datashet Dec 24, 6: Maybe a port is used, though I doubt it.
DataSheetDirect – catalog listing “9” no 1
Thu Dec 23, Forum Index Development 93c46 emulation. Or did you see the code in a disassembly, but never actually called?
Wed Jun 15, Still need to verify if this is used by games. Just lot of tedious bit-banging.
The idea behind emulating this is that you wait until datasheett 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 available for developer, as well as chipset documentation from www. Fri Jun 10, 2: The 93C46 datasheet indeed makes no mention of that but the 93C46B one does.
Just some ideas dagasheet observations. I think bit 1 of the same address might distinguish between a read or write operation, but that’s pure speculation.