TI-99/4a Hardware Number Pad Modification

This is a cool little piece of hardware. A man named Don Kivett designed and put it together. I thought it didn't work when I first plugged it up because it would display 3 or 4 of each number I typed in. It took some contact cleaning and repetitions, but it works perfectly now. Think of it... a TI99 with a user-friendly keypad!!! This is my new favorite piece of gear!!! Saves tons of time in programming, I swear to you.

Category:

Science & Technology

Tags:

• commodore
• computer
• texas instruments
• ti-99
• ti99
• texas
• instruments
• vintage
• computing
• hardware
• modification
• ti-99 computer
• game
• vintage computer

[sergeantsoap]

how old is this shit

[Opry99er]

Pretty freakin old. The console was made in '82, the number pad, who knows. :)

[tursilion]

I'd be happy to take a look at it, probably I should finish my PS/2 keyboard. hehe. :)

[Opry99er]

Hey, awesome job on the EPROM Arcturus cart with jon. I'm glad you guys are around... gives people like me something to aspire to.  =)

[GratedTopping]

That's great; I'm back into using my TI with a new 3.5 floppy drive and a cable using the TI with the RCA plugs on the TV.

[Opry99er]

Thanks... I wish I knew someone who knew hardware so that I could get a schematic on how to modify OTHER TI99s with this number pad. Maybe someone on the Yahoo UG. We shall see!

[spelenet1]

cool



[Ogma01]

I wonder how difficult it would be to use an Atari CX85 numeric keypad instead? I have a spare around here somewhere... ;-)

[beauknoz]

Did you ever get this thing figured out? If so, I'd like to see some schematics