Re: TI-H: ROM Dump
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Re: TI-H: ROM Dump
>On Tue, 9 Feb 1999, Daniel E Walker wrote:
>
>> I'm new on the list, so I'm sorry if this one's horribly off topic.
>> What's a good way to go about getting a ROM image from a TI-86 when
>> you're too lazy to build your own cable and you're stuck with the TI
>> Graph Link? The TI software doesn't seem to have a provision for that,
>> or receiving backups, another thing I'd like to be able to do.
>
>TI won't be likely to make available any software capable of receiving a
>ROM dump, because the ROM is proprietary stuff and they probably wouldn't
>like Casio or somebody to disassemble it and make a clone using TI
>routines.
>
>But you can probably find a ROM dumping program from TIcalc.. Typically it
>would be a combination of an assembly program to run on the calc, and a
>program to run on the computer to receive data through the serial port.
>
>The program on the calc would simply step through the entire memory space
>of the calculator (well, the ROM space anyway.. not much point in going
>through the user RAM) and send each byte through the link port. Not a
>particularly difficult program to write, but I don't have an 86 to do it
>with.
>
>> A while ago I seem to remember there being a project (for 85's I
>> think) about an external memory bank... think it was based on a flash
>> memory type system. Anyone remember/have any pointers to that?
>You're probably referring to the Expander SF by Mel Tsai? The project did
>work (I built a few myself) but National Semiconductor sold out their
>flash memory business to Toshiba, and they decided to discontinue the
>chip. Nobody has produced a derivative work using a newer chip (that I'm
>aware of..) Oh for the days of high school, when I had time to play with
>this kind of thing.
Using a 2 diodes, in theory you could MOSI and MOSO to the same pin, pull
CS low, and use SCLK on the other pin of the calc. At the least, it would
only burn up a flash chip.
I'm going to try it.
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