I thought I'd run this one across you guys as I can't find the problem.

I developed some small code using CCS C complier with a '84(A).  All worked
well.  I they wanted to use a cheaper device and went to the 16C620.
Changed the include file in the compiler, of course.  Now, the bit-banged
serial output on pin 18 works well, but the big-banged serial input on pin
17 doesn't work.  I see that the device starts up with all interrupts
disabled, so that shouldn't be a problem.  Anyone know offhand what might be
causing the trouble?  Yes, the code is less than 512 bytes.

I notice that the date code on the 16C620 is 48th week of 95; rather old
even thought I just purchased it a few days ago.  Suppose any changes in the
silicon have been made between then and the most recent databook printing?

Also, what is the best alternative (pricewise) to a '84 once development is
complete (i.e. not needing the EEPROM)?

Thanks in advance for your thoughts,

Todd Peterson.