Jump to content
IGNORED

Achievement Unlocked: TRS-80 Model 1


Cheshire Noir

Recommended Posts

Hey Folks,

Just got a TRS-80 Model 1, and Expansion Interface to match.

ABLVV857fHl561uMob9MRk8zfVOkG_3na17IkcN2Jqa36ofsAnae4qDQA08lDtUnkr1nXQ4EjzNZOlj--p2UAm5-cWtyrwERr-xZDgL-svaEKXx9wyLa9T_dh1IEUnHDW4nXuPLDf3E8tuFOtfg3Xcw4G7pXDDFQMQ57bQuam5x7RKLKvM8OSsNmdQcVyXSmMQfFICUbFYWCxG9U2KfPrAFm3ZNjPIM3-31y-J1XDjhRu7NXvFE1OvsyrouA6fnVFr4xGNem00hcarAIrOPiG-BzTMXbof6lIbiFSjTQXGyFLwg3hVhkhs6cx878YSgLA5GAQ59lGcMO3WbiDbW3iYzqgodQB8PY1ad6qK-PQyV4G03hULt-fF_S3_WRhaXPufcvds1kD7cFf6Rr8SEV98xdz-rbrb5qgV-6WnxuK7K0PPblMT1fXbyfiJJH3EGsuPmNNK7vkM0K_wWqIOb3y048cdXoVEBFeAom4kZgrF9fNZcsva1OEBo3vTJRawHNdwlMQ6ebgX7Jc6gZJNmw2LhVqRxMkOKHjJbadUA946wDbMrhocrfAh_HTUnzDpj7C9brOzybrg72jNuHZFFwAwUHuK9BsbbPPPIBO_g_KZ_DPv1DcQGS5D8jJiwqjZlzj_BIv4u00WhPGjwR7hr76G3KblKW89iu1iquXuTmU05vPjWbn5GwhbF1zpPoR6tz_UyZopdZrk0kwqMq2sW2ohTobxhb0eSFOst9zpfZz3EblWnqzww1N8atAyRmD0DtH4d1bOZm8JpSidoxATqdl7CgjWEkWK4xjd-29nI1l4W6kGSPx-gGUHZt7wVkdvec14hgtUCtrrPDt1yYdljYm0RdzsRzb8U0A-rJbQZWLq7k3QzUyZ5lHhqziSHvOZk=w1375-h1031-s-no-gm?authuser=0

(This was when I got it. It's much cleaner now)

Both parts were dirty, but mostly cleaned up OK. The Model 1 has two dead keys, and one dodgy key, but otherwise seems to boot fine. Unfortunately I have no way (yet) to test the Expansion Interface, as I only got one PSU with the two units.

I'll desolder the malfunctioning keys and see if I can resurrect them shortly. I may need to replace that evil keyboard ribbon cable while I'm at it. We shall see.

 

Open to suggestions on a solution for the second PSU. The first one seems remarkably simple. A 16v transformer and a pair of diodes...

 

Can't wait to get the expander working.

 

Cheers!

 

Chesh

Link to comment
Share on other sites

Yeah there's space in there for a pair of 110v PSU. (Found the cavity while cleaning it up). The Aussie PSU seems to be about 75% bigger than the US one so mine was plugged into the expansion, but wasn't in the expansion. There's definitely room enough I can hide something in there. 

I was looking at toroidals from Altronics. Not sure the minimum voltage the units will run from, but if they will support ~14V on the DC line, I can power both units from the one toroidal and hide the gubbins in the Expansion Interface. That way I could run both systems from the one wall connection.

 

I'd want to build something with some safety features not found in the stock PSU, such as a fuse, and an on / off switch. I don't really want to case hack it, but it's already in rough shape. I will need to make a decision on that.

 

Chesh

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...