> I would like to stick to the F84 for now as im still learning and want to
> stick to what I know and what I already have.

OK... but...
16F84:
14-bit core
Max oscilator 10 MHz
1K word (program space)
68 user registers
64 bytes EEPROM data
13 I/O ports (and you MUST load MCLR with a resistor)
Timer 0 (8 bits)
arround 600 spanish pesetas (4 MHz)

16F628:
14-bit core (same)
Max oscilator 20 MHz
2K word (program space)
224 user registers
128 bytes EEPROM data
15 I/O ports (MCLR, OSC1, OSC2 could be I/O)
Timer 0 (8bits)
Timer 1 (16 bits)
Timer 2 (8 bits, and retrigerable) (perfect for time bases)
A 2 channels comparator (two comparators)
A programable voltage reference)
A UART (now I'm using it al 155200 bauds)
A capture/compare/PWM module (that uses Timer 2 for work)
arround 430 pesetas (20 MHz)

...mmmmmm the UNIQUE difference are the Comparators, it brings active at
reset, so PORTA seems to work erratic. To obtain a 16F84 using a 16F628 you
must use this 2 instructs at very near to reset:

reset_vector:   movlw b'00000111'       ;sequence to disable comparator module
                        movwf CMCON

Sorry for my bad english.

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