Hi,
just want to say that i finally could fix my 2 Simmons SDS-1000, both
Microcontrollers were dead, and i could reprogram the MPU using an
Xeltek programmer with a MPU Atmel AT89C51-24PC. This MPU is totally
compatible with 8051 architecture, and also it's possible to erase
the MPU electronically and reprogram them again and again.
If someone need a copy of the program let me know and i will e-mail
the BIN file.
REGARDS,
Akira