Mike's PCjr Page

I didn't think I still had the 10MB HDD for my Racore add-on, but I found it in the original 5150 that I thought I didn't have anymore; I guess I am a packrat.
My first attempt at getting it working is stalled because it seems I am missing a signalling cable that connects from the Racore sidecar to ... well, I forgot where and I lost the instructions. Can anyone help refresh my memory on this cable?

David

Anyone know how to do a low level format with the Racore addon? I tried the Debug g command at several locations but it does not appear to have the utility built in.