Any information on the Sitronix ST2202 Microcontroller?

Hi,

I just recently got a Franklin/Rolodex RT-8214 'cause I thought it might be fun to hack around with. You can download Franklin supplied extra programs through a PC USB cable so I thought I might try my hand doing my own. Unfortunately, there doesn't seem to be any sort of developer's kit available from Franklin so I've got a bit of reverse engineering on my hands.

The unit uses the Sitronix ST2202 processor. Unfortunately, aside from a processor manual (which only describes the modules and control registers) there doesn't seem to be any further documentation on programming it. Find the manual at

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. I was hoping that it might be compatible with an well known processor, but my experience is with Z80, 8080 (a little) and AVR and the register layout doesn't look like any of those. It is an interesting little processor though, particular for devices like this.

Can anyone suggest resources for programming information for this CPU?

Thanks very much,

Jos'h

Reply to
oofoe
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It looks like a 6502 variant. Modified 6502s are commonly used in this sort of application; other vendors (e.g. Sunplus) explicitly advertise the 6502ness.

If you have some existing binary for the device, try loading it into my ancient Re39 disassembler (it is for Rockwell C29/39 CPUs, but these are also a 6502 variant). See if any of the code makes sense.

Reply to
larwe

Definitely a 6502 derivative. It might even be a _real_ 6502: WDC licences the 65c02s IP.

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Regards, D.

Reply to
D.

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