When using the driven circuit, no suggestions are made with regard to the best source of Vcc for the MAX232. The obvious source is the USB port on the thinkpad - +5V and grnd. However there is a ver ...
on a T23 - Managed to get my connection order messed up so read the eeprom, but created the crc error. stupidly tried to clear the crc error by pulling the cmos battery, and now it hangs on p ...