Datasheet for microcomputer trainer CPU

[dukes909]

Who here remembers the Science Fair Microcomputer Trainer? Most of these appear to have shipped with a TI TMS1100 CPU. Mine however has what is labelled as a Texas Instruments MP1312. Does anyone know where to find a datasheet for this IC? In the manual I have in the parts list, it shows the line "Large Integrated Circuit, TMS1100 OR MP1312", which to me indicates they are not identical chips. I have struck out finding a datasheet on the chip (I have a project in mind and need to know the voltage requirements/limits but would like the sheet regardless).
Cheers
Dukester

 

[VeryVon]

Hello, I don't have this device but I was doing a few searches and here are some interesting pages that came up, you probably found the same:

Calculators

Fun and passion for Watches Texas Instruments. Calculators, Home Computer TI-99/4A, TM990/189, TI-2500, Speak & Spell. Our goal is to open a museum in the city of Rieti dedicated to Texas Instruments. TI Watch Museum OdV

www.facele.eu

^^ Shows "Type" as TMS1100 and "Marking" MP1312.

Also found some MAME stuff on this, like this page:

MAMEHub/Sources/Emulator/src/mess/drivers/hh_tms1k.c at master · MisterTea/MAMEHub

Netplay-capable multi-machine emulator. Contribute to MisterTea/MAMEHub development by creating an account on GitHub.

github.com

^^ Shows "serial" as MP1312 and "device" TMS1100

I don't know what the MP is for. If you look on that first link you'll see they also talk about TMX vs TMP vs TMS, but then it would be labeled "TMP1100" so I don't know where the 1312 comes from.


Would it be safe to assume it has the same electrical characteristics of a TMS1100? I don't know!!

 

[dukes909]

Hello, I don't have this device but I was doing a few searches and here are some interesting pages that came up, you probably found the same:

Calculators

Fun and passion for Watches Texas Instruments. Calculators, Home Computer TI-99/4A, TM990/189, TI-2500, Speak & Spell. Our goal is to open a museum in the city of Rieti dedicated to Texas Instruments. TI Watch Museum OdV

www.facele.eu

View attachment 1243449
^^ Shows "Type" as TMS1100 and "Marking" MP1312.

Also found some MAME stuff on this, like this page:

MAMEHub/Sources/Emulator/src/mess/drivers/hh_tms1k.c at master · MisterTea/MAMEHub

Netplay-capable multi-machine emulator. Contribute to MisterTea/MAMEHub development by creating an account on GitHub.

github.com

View attachment 1243450
^^ Shows "serial" as MP1312 and "device" TMS1100

I don't know what the MP is for. If you look on that first link you'll see they also talk about TMX vs TMP vs TMS, but then it would be labeled "TMP1100" so I don't know where the 1312 comes from.
View attachment 1243451

Would it be safe to assume it has the same electrical characteristics of a TMS1100? I don't know!!

Excellent finds, thanks. Looks like it is a very specific ROM burned into a generic TMS1100 depending on the device? Cool.

 

[VeryVon]

Excellent finds, thanks. Looks like it is a very specific ROM burned into a generic TMS1100 depending on the device? Cool.

Yep good point, looks like this guy has dumped quite a few including the MP1312:

Sean Riddle's Home Page - TMS1100 ROM bits

 

[decle]

The heart of the SFMT is a Teas Instruments TMS-1100. MP1312 is a reference to the particular mask ROM program, instruction PLA and "O" output PLA configuration requested by the customer, presumably this was originally Gakken in this case. In the case of the MP1312 used in the SFMT both the instruction PLA and "O" output PLA have the standard configuration. Therefore, the standard TMS1000 datasheet describes the instruction set on pages 16 and 17, and the "O" output has the 7-segment display mapping described on page 9.

Perhaps the most interesting thing about the SFMT is that using only the 4bit TMS-1100, with its built in 2K of ROM and 128 nibbles of RAM the authors implemented a virtual machine, a basic machine code monitor and seven "games". When you're running your own programs onf the SFMT its TMS-1100 is emulating another, different, 4bit computer.