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Re: Upgrading an Unenhanced IIe



Scott Alfter wrote:
Great Hierophant wrote:
Finally, Apple must have rewired the unenhanced IIe board to allow it
to do DHGR.

Unless you have a Rev. A motherboard (which is unlikely), the board you
already have will do DHR.  No modification is necessary.  If you're using an
Apple extended 80-column card (or maybe some clones), there's a jumper on
the card that should be installed to enable DHR.

Hi

I'm wondering what that jumper would be doing. Just connecting two signals from the motherboard?

I have two 80column/64K cards, both "clones" and none of them have a jumper.

Also none of them have RGB output so I'm wondering if it would be easy to make this circuit myself, to produce the RGB signals. I have been searching the net for info on that but haven't found anything specific.

My IIe is also rev. B and unenhanced.

I'm rather new with Apple II. It was a friend who had one and I recently bought this IIe. My old machine from back then is a Video Genie, a TRS-80 Model I clone. (Apple II was too expensive.)

Knut