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View Full Version : My busted up 2001



Erik
July 2nd, 2006, 08:56 PM
I got sick of unpacking and sorting this evening and decided to play with a few machines.

During play time I decided to see what's up with my busted Pet. Unfortunately the case is so far out of whack that I can't prop the hood open to see what's rattling around inside.

The rear hinge was shifted almost half an inch and the edges of the back of the case bump into the back plate while it's opening. If everything were aligned properly it would work great, but as it is I either have to find a way to bend it back (easier said than done - I worked up quite a sweat trying) or drill out the rivets to remove the hinge entirely. If I do that I can probably replace them with nuts and bolts or sheet metal screws, but it wouldn't be the same. . .

Ugh.

Erik
July 2nd, 2006, 09:49 PM
Wow. Just wow.

I had an idea about how to open the Pet. After smashing up my thumb I was finally able to do it.

For those following the saga the back end of the machine looked like this:

http://www.vintage-computer.com/images/pet/petbackcorner2.jpg

When trying to lift the upper part of the machine the back would hit those lips on the edge and prevent the case from opening more than a couple of inches.

I decided to bite the bullet and bent those lips out so they cleared the case as it opened. It worked, but it's going to be a bear to fix right if I ever try.

Once I got the case open I was able to check around for damage and saw nothing but misplaced plugs and parts. I plugged everything back in where it belonged, crossed my fingers and turned the machine on.

By some stroke of unimaginable luck, it worked!

The Timex Pet started right up!

http://www.vintage-computer.com/images/pet/firstrun.jpg

Since I've got her open, here's the inside:

http://www.vintage-computer.com/images/pet/inside.jpg

The board sitting on top of the motherboard is an aftermarket expansion unit that adds RAM and 4 expansion slots. Two cards can be seen off to the right - a disk controller (there is a dual 5.25" floppy drive that pre-dated Commodore's drives around here somewhere) and replacement ROMs since the 2001 didn't support disk drives.

Although it's all plugged in the system still boots with 7167 bytes free. Some more debugging is in order.

Also, the chicklet keyboard, while in nearly pristine cosmetic condition, works very poorly. Fortunately the machine came with an external full-key keyboard. The keys aren't where they should be, but it works great.

http://www.vintage-computer.com/images/pet/withkeyboard.jpg

Sorry for the oversize pictures. ;)

carlsson
July 3rd, 2006, 05:57 AM
Bizarre. When it comes to the disk controller, isn't it possible that it maps into a higher memory block somewhere, so it doesn't steal RAM? I suppose with 8K RAM and 16K (8K ?) ROM, there should be plenty of space in the 64K address map.

The keyboard doesn't look PET/Commodore at all. Is the interface somewhat common, so other types of keyboards are intercompatible? I have no experience with cleaning a chiklet type keyboard, but the later types of keyboards are reasonably easy to restore into working condition, at least if you have grafite spray (?) as well as cleaning alcohol etc.

dongfeng
July 3rd, 2006, 07:32 AM
I imagine it would be fairly easy to find a dead PET and swap all the parts over?

carlsson
July 3rd, 2006, 08:17 AM
Only the very first PET (2001) had chicklet keyboard, and there are not so many of those.. despite going through a basement and a garage full of PETs (like I posted before), I didn't find a single chicklet one. One 2001 with real keyboard though, untested condition.

DOS-Master
July 4th, 2006, 04:53 PM
well..... at least you know how to open it now