RC2013SG – The Starting Point


As my entry for RetroChallenge is to finish a kinda sorta started project, I guess I had better document the starting position:

frontside1

backside1

Basically, I have the PLCC socket in place, and the 8MHz crystal oscillator, and its’ phase-shift and load circuits; and a couple of the 10K resistor packs needed to pull-up all the many unused signals lines of the 68HC11.

The biggest nightmare of this project is that the majority of the hardware is going to have to be done “blind” – I will have to add the LVI/watchdog chip, the reset circuit, the power input circuit, the serial interface, and all the pullups, all before I can even test whether the microntroller actually lives. There is a lot that can go wrong befopre I know whether I have a live or dead 68HC11!

Those modern-day AVR/RasPi/SimmStick hackers have it waaaaay too easy!

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s