[sjt99]

I recently revived a Horizons Ramdisk and noticed there were a few changes made to it that I didn't have on my original HRD.
After much searching, I found the document detailing when these changes were made. I was curious because I recently saw a photograph on another forum of the HRD that did not have the Mod's on the card I have.

The sheet attached is a rejuvenated copy of the Bud Mills Mod sheet on the HRD from 1988.

The 2 modifications address the following concerns and issues with the original cards.
The first was to allow the TI computer to reset the card during it's cpu power up.
The second was to make the card invisible to the system by disabling it's CRU by use of a switch located on the card rear edge.

If you have a early Horizons Ramdisk, check to see if you have these modifications.


Steve

Additional:
If anyone reading this has the original manual for the Horizon's Ramdisk model 1000 Please upload it here.
So far I have not been able to find it.