Can I use any ASCII keyboard with an Apple-1?

4 posts / 0 new
Last post
Offline
Last seen: 3 years 10 months ago
Joined: Mar 6 2013 - 18:44
Can I use any ASCII keyboard with an Apple-1?

Folks,

Can I use any ASCII keyboard with an Apple-1?

In the Apple-1 Operating Manual, Wozniak indicates that any ASCII keyboard could be used with his Apple-1.

But in reading the posts in Applefritter and doing some reseach, it seems to me that most people use Datanetics, Amkey, or modified early Apple II keyboards with Apple-1s.

Is there something special on the encoder or to anything else in these keyboards that make them usable with an Apple-1?

If not, then I could use any ASCII-compliant keyboard, such as a TI-99 computer one.

Thanks guys,

rookie2013

apple2lives's picture
Offline
Last seen: 4 years 2 months ago
Joined: Feb 17 2013 - 23:43
Re: Can I use any ASCII keyboard with an Apple-1?

I do not remember if the Apple-1 required 8-bit or 7-bit ASCII; but I am willing to place a bet on 7-bit.

The Apple II uses a dumb keyboard. This was probably done to same money. To use an Apple II keyboard; you will need to design hardware that scans the keyboard matrix and then does the ASCII encoding.

Just purchase a parallel ASCII keyboard.

Offline
Last seen: 1 week 5 days ago
Joined: Oct 9 2011 - 12:54
Re: Can I use any ASCII keyboard with an Apple-1?

Or Mike Willegal makes a great ps/2 to parallel keyboard adapter. Then you can just get a ps/2 keyboard.

apple2lives's picture
Offline
Last seen: 4 years 2 months ago
Joined: Feb 17 2013 - 23:43
Re: Can I use any ASCII keyboard with an Apple-1?

I checked my old note books and found this:

Apple-1
14 - Strobe
5 - B1
4 - B2
3 - B3
2 - B4
6 - B5
7 - B6
8 - B7
9 - Gnd
16 - +5

This means that the Apple-1 uses 7-bit ASCII. You only need to use data-0 to data-6 from the parallel keyboard. The data-7 line is not needed because it applies to extended ASCII.

Log in or register to post comments