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Well..... that was easy. Got it to load and run. Next I need to find out what terminal the simh CP/M is using. Mike

Thanks, I'll look into it! Mike

I had just discovered simH CP/M. I downloaded it and got it started. Seems to work just fine. I have a real CP/M machine with two 8 inch drives and I use Wordstar 3.0. How can I make a Wordstar 3.0 disk for the simH 8080 CP/M machine? Thanks Mike.

Mike, I had to look up what an LPG-30 was. Now that's hardware. 800 pounds, Takes 1.5 Kwatt to run it and cost $47K. I have seen the Friden SFD on the Colossus computer at Bletchley Park UK. Not sure exactly how it was used, probably made or read those long paper tape loops. I wonder what the...

It's really amazing what can be done with cams, levers, a bunch of relays and other mechanical stuff. I had it type a help file and the typing puts you in a trance as it is working. This led me to another problem, this time with the Friden. There is a mechanical ribbon direction changer. During...

My son, Dan came over this evening and we were talking about youtube and my trouble uploading to it. He said it should be no problem to do it, so he toke some time and showed my how. We uploaded three videos. The first one showsthe Friden typing. You can see the machine working, but the paper is...

Well, I figured out how to make the video with my Canon camera. It turned out pretty good. But then I attempted to upload it to youtube, what a pain in the neck. I found youtube not very helpful. Apparently the way they think does not compare with how my brain works and after all morning horsing...

Well.... at long last! I believe I have the Python3 RPI program that connects my Friden SFD to my PDP8E. For a long time I was attempting to make the Friden code to ASCII code conversion work on a character by character basis. I was pulling my hair out trying to keep everything straight and not...

The last few days, I've been working on a Python routine to convert the Friden Key presses to ASCII and send them to the PDP8E. To avoid the full duplex echo back problem, I just connected the Friden key board to the PDP8E and the PDP8E output to the CIT-101. The problems that needed addressing...

Well..... last night I stayed up late, at least for me, to work on my Raspberry PI Python program. Once I got past the serial data string problem I was a little anxious. I'm still relatively new to Python, but have had some luck with it. Anyway, I cajoled the Friden and the Python to type out...

Thanks, Vince. I think I proved this to myself. I entered a short program that read the SR and outputted it to the terminal. 0000 7604 load AC from SR 0001 6046 0002 6041 skip 0003 5002 loop until char 0004 5000 start again I caught the serial string, with the SR set to 0100 0001, a cap...

Not 100% sure. The only things that I know that can be set on the M8650 UART card is one or two stop bits and the baud rate. I don't see or remember anything that sets parity or byte size. Looking at the schematic there is an eight bit shift register that takes DATA 04 though DATA 11. I'm...

Well.... I'm making progress, all be it slow. The last few days I connected my Friden code converter project to the PDP8E and it would not work at all. I pulled out my hair horsing around with crossed RS232 cables etc. Then there was a failure in the Friden. Seems that when working with old...

The only reason I posted this was, I have little experience with switching power supplies. I have tested and tried a number of different things in the past hour or so. The MW was on the bench and back in the project a few times. I loaded the MW to a couple of amperes, added some capacitors etc...

I know this isn't exactly DEC stuff, but kinda related. I have written some software for my Raspberry PI to read the selector code contacts from my Friden Flexowriter. These contacts close for a key press and present that code through some level converters to my PI. The converter circuit is very...

So far my RPI software will take an RS232 signal from my CIT-101 monitor and send it to the Friden for typing. Going the other way, I only have the ability to accept a character from the Friden and the RPI will display the received Bits on the RPI screen. I need to make another look up tablet or...

Doug, here is the hardware. This is the 1959 Friden Flexowriter. The level converter and finally the RPI. Mike For some reason the pictures were posted in a mixed up order. The top is the RPI, the middle is the Friden and the bottom is the level converter.

Thanks, Vince. I'll give this a try. Should have known that programming might solve this. Mike

A few years ago, I acquired a Friden Flexowriter SFD-V. After a year or so, doing a lot of cleaning, adjustments and replacing the drive platen, my Friden is working. I would like to connect the Friden to my older computers. I started out by making a level converter. The Friden logic uses 100...

My approach to computer 'stuff' is exactly like my Model T club's approach to our cars. "We drive them, We don't tow them around!" But each to his own. Mike