Profile

Cover photo
Chris Osborn
Lives in Sacramento, CA, United States
239 followers|453,950 views
AboutPostsPhotosVideos

Stream

Chris Osborn

Shared publicly  - 
 
A brief #retrocomputing history lesson. 
5
1
duane attaway's profile photoAlex Swavely (helifino)'s profile photo
2 comments
 
I miss my next
Add a comment...

Chris Osborn

Shared publicly  - 
 
I need to raise $25 in +Bitcoin to use for a prize in a retro challenge so I'm doing a "pay what you want" sale. These are special stickers that I don't offer as prizes in regular RetroBattlestations contests. Send me some bitcoin and I'll send you one of these vinyl decals! Or if you don't like these, you can choose from the collection of retro themed ones that I do give away as contest prizes: http://imgur.com/a/iAS5T
1
1
Add a comment...

Chris Osborn

Shared publicly  - 
 
Happy 35th to the IBM PC! https://redd.it/4xe9my
6
1
Add a comment...

Chris Osborn

➥ Raspberry Pi  - 
 
Combine IoT and fireworks using a Raspberry Pi!
A couple of months ago I purchased several relay boards and switching power supplies off eBay with the plan to re-use one of my original (256 megs of RAM and no mounting holes) Raspberry Pi model B computers as a sprinkler controller. The parts arrived and I set them aside expecting to have time to work on the project after the 4th of July. About two weeks before the 4th though I realized if I got the project assembled in time I could use the spr...
13
1
Stein-Ove Bratthammer's profile photoChris Osborn's profile photoE Muhammed Saheen P (Mr E)'s profile photo
3 comments
 
Good wiring 
Add a comment...

Chris Osborn

Software  - 
 
Spent yesterday making a LASM compatible 8080 cross assembler. I'm not sure how much 8080 code is still out there that was meant to assemble with LASM, but now if you want to cross assemble it without having to convert all the mnemonics to Z80 you can.
With the TRS-80 Model II working one of the first things I did with it was to send the world’s first tweet from a TRS-80 Model II. To do that I used Kermit for CP/M. World's first tweet from a @RadioShack #TRS80 Model II made in 1979! https://t.co/5trIKlhBqW pic.twitter.com/2vJffAAhGb — Chris Osborn (@FozzTexx) June 2, 2016 The TRS-80 Model II support in Kermit is missing hardware flow control support however which means that it’s very pron...
40
4
George Phillips's profile photoChris Osborn's profile photo
9 comments
 
+George Phillips Wow, bizarre. No problems compiling on two other Debian 7 64-bit boxes. And if I pull down 10aug2013 on this one, it compiles fine too. But this one box hates 3dec2014.
Add a comment...

Chris Osborn

➥ Show-and-tell  - 
 
Last week I sent the world's first tweet from a TRS-80 Model II running CP/M (https://twitter.com/fozztexx/status/738216319854641152). But before I could do that I had to repair the capacitive keyboard. Luckily all it took was some gift wrap and weather strip to get the keyboard working again!
My TRS-80 Model II Last weekend one of my usual sources of inspiration, @duhproject, received a Commodore 128. A lot of people on Twitter started talking their 128s, so I had to get mine out too. I thought it would be interesting to try out a true 80 column terminal program under CP/M since it was something that the 128 could do that that 64 doesn’t. It didn’t take long before I decided that running CP/M from a 5.25” drive wasn’t “CP/M enough” ...
24
Joshua Wilkins's profile photo
 
Gasp! You still serviced it when it warns that there are no user servicable parts?! Radio Shack won't be pleased.

...oh wait. ;)
Add a comment...

Chris Osborn

Shared publicly  - 
 
Happy 30th to the Apple IIɢs!
4
1
Add a comment...

Chris Osborn

Shared publicly  - 
 
I've got a new #retrocomputing challenge for you: #CauzinSoftstrip + #Bitcoin!
It's been a while since I did a retro challenge since they tend to be quite a bit of work to put together. The last two used modems and my BBS as the heart of the challenge, with the first one simply requiring dialing in with a real modem, and the second one requiring a little more work by decoding a secret message and running some special software. This time around the data won't be encoded as audio, but it will definitely be no less interesting...
1
Add a comment...

Chris Osborn

Curiosities  - 
 
I was able to crack the encoding of the Cauzin Softstrip barcodes!
On RetrBattlestations one of the most popular challenges is a recreation of the days when magazines used to publish their own programs. Back before the internet, and when dialup was still expensive, magazines would publish source code listings and the only way to get it into your computer was to type it in. Whenever I work on one of these challenges I come up with a BASIC program for people to type in on their computers. But I always think ab...
37
2
Rogelio “DrummerWithADayJob” Perea's profile photoEd S's profile photoJeffrey Brunken's profile photoStephen Gunnell's profile photo
5 comments
 
It was very annoying at the time because the readers were scarce and expensive. I don't think I ever saw one in a computer store here.
Add a comment...

Chris Osborn

Software  - 
 
The sixth BASIC programming challenge is happening on RetroBattlestations! The program this time is based a little bit on the very first program, except it has been changed to use a simple stack based command system to draw. Can you port the program to a new platform? How about one that doesn't even have graphics? I did a port for the TRS-80 Model II using inverse characters as "pixels."
9
Ed S's profile photoChris Gallaty's profile photo
2 comments
 
May have to print this up and get the boy to key it into his Apple ][...
Add a comment...

Chris Osborn

Software  - 
 
Now that I've fixed tcpser to support connecting to real telnet servers, several people have asked me how they can ssh from their retro computers. It's not too hard to do and I wrote up a quick guide on setting it up.
You decided to "work" from home and you're having a blast killing aliens, rescuing princesses, and finding buried treasure. And of course right while you're in the middle of solving the world's hardest puzzle an urgent call comes in from the office. Of course that means you’re going have to get up and go sit at another computer to ssh in and see what's going on. Wouldn’t it be nice if you didn’t have to do that? Using a combination of tcpser and...
23
2
Ed S's profile photoMarek Karcz's profile photoEdward Kent's profile photo
4 comments
 
You can do the same thing with the c64 and a true serial interface.
Add a comment...

Chris Osborn

Shared publicly  - 
 
I was able to get the Smith Corona repaired and I can now print to it from a computer! The fix was easy, just a blown fuse. But opening it required knowing the secret. I still don't have all the details on dip switch settings and escape codes for controlling formatting, but I've documented everything I've figured out and posted it here.
This article is a followup to my previous article about trying to open and repair this typewriter. It's open! Bob Will didn’t have a service manual for my Smith Corona Memory Correct 400 Messenger but he did let me in on the secret to getting a mid ‘80s Smith Corona typewriter open: pry really hard. Yes really! Before you do that you want to remove the two screws near the platen. After taking out the screws the only thing holding the cover o...
8
1
Add a comment...
Story
Tagline
I fix stuff, I build stuff, I invent stuff
Basic Information
Gender
Male
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Sacramento, CA, United States
Links