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(Post Link) post #1 of 6 Old 15-09-18 Thread Starter
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Connected up my first ever computer

Borked.

TRS-80 Model 1 and it just displays random characters on the screen.
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Turn it off and then back on again.
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(Post Link) post #3 of 6 Old 15-09-18 Thread Starter
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I wish I'd thought of that.
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(Post Link) post #5 of 6 Old 16-09-18 Thread Starter
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Quote:
Originally Posted by Keithy View Post
Geek.
The TRS-80 Model 1 came with 6-bit video memory which meant that it could only display 64 different characters on the screen. This meant that it only ever displayed upper case text although the character generator was capable of displaying lower case. I added a 7th bit to the video memory by soldering on a piggy-backed static RAM chip and running wires to the relevant address lines as well as cutting through one of the PCB links. Afterwards it would display lower case text fine and I was very proud of my 16 year old self.

I don't believe this mod is the reason why the machine is now kaput.
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(Post Link) post #7 of 6 Old 16-09-18 Thread Starter
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I had enough toys.
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Originally Posted by Paddy OPlastic View Post
I wish I'd thought of that.
Always here for you bro.

You’ll be glad to know Charles Babbage had similar problems.

Last edited by Verbout; 16-09-18 at 18:59.
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