bfollowell Posted October 28, 2021 Share Posted October 28, 2021 (edited) I was gifted an old, 1979 Atari 400. It definitely needs a lot of work and TLC. She's pretty dirty and needs a good bath. One of the bottome case screws is missing and there were only two internal screws in place. There's some bodge wire going from the power board up through the interlock switch plunger hole in the aluminum shield preventing me from removing the shield, so I'll have to remove it first. The internal speaker is missing and one of the screw mounts inside is broken. More of the keyboard doesn't work than does. I had to fix down the interlock switch as there is no plunger any longer. It has some sort of composite video/audio mod terminating in RCA jacks mounted and soldered to the power board going through a hacked out square hole in the back where the old channel selector switch used to be. They're pretty loose and will probably go eventually in favor of one of TF_HH's Super Color CPU cards. As you can see, I have my work cut out for me this winter, but it should be fun and rewarding. I never really thought I wanted a 400, but once this one just sort of fell into my lap, I've gotten really excited about it. I was hoping to peek & poke around in Basic and find out what version of OS it has and whether it has a CTIA or a GTIA but with most of the keyboard not working, that's really not an option just yet. I guess I can check out the graphics chip visually, once I get the shield off. The keys that are working on the keyboard are: Spacebar, X through M ,./ Left & Right Shift, Ctrl S through L ; + Everything else appears completely dead. Is there a keyboard matrix legend available anywhere or is it the same as the XL machines? I haven't had any luck finding one so far. I'm assuming the 400 uses 4051s to control keyboard input as well, so I'll need to check those out as well. It could be that the keyboard itself is just fine. Anyway, wish me luck with my new project and I welcome any advice and suggestions. I've never had any experience with the 400, and my last experience with any 400/800 was my original 800 that died in 1986. Edited October 28, 2021 by bfollowell 1 Quote Link to comment Share on other sites More sharing options...
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