|33s PC interface|
Message #1 Posted by Klaus on 4 Apr 2005, 3:51 a.m.
Using a PC-interface, one might be able to load programs into the 33s, and read them back into the PC. One might also be able to program "unprogrammable" keystrokes like the "GTO .nnn".
If the goal is oonly to load and store programs, and not entering calculations from the PC, it shouldn't be too hard to modify the 33s.
We want to read and change the contents of the ram, so there is a need to propagate the pins of the ram-chip to the outside of the case. Depending on the type (serial/parallel), it means soldering 5 to 27 wires to the ram-chip.
The 33s could then be plugged into the interface ( consisting of a microcontroller or some logic-chips ) that is connected to the PC.
What I have to do:
1. buy a 33s
2. open it and identify the ram-chip
3. solder the wires
4. build the interface
5. analyse the way programs and variables are stored
6. write a compiler/decompiler
Since one is not able to read the ROM, this should be perfectly legal.
Any help is appreciated! I would like to hear some comments about my plan, too! Klaus