The Z80's secret feature discovered after 40 years!
- Thread starter GURPS
- Start date
I still have a chipset and schematic for a Z-80 based computer I bought about 40 or so years ago.
One of those round-to-its, I never got around to.
Have the unetched PC board, too.
One of those round-to-its, I never got around to.
Have the unetched PC board, too.
someone on the Reto PC market my buy that
Hmmm, once I finally have all our stuff sorted, will have look into that. Still have a Timex-Sinclair 1000, C-64 and C-128 that work. Some peripherals, too.
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My awesome Shack Model 4P was run by a Z80.
Whoohooo! Only 26lbs.
The TRS-80 Model 4P
The TRS-80 Model 4P (catalog number 26-1080) was a transportable version of the TRS-80 Model 4, released on November 15, 1983 for a starting price of $1799. This was …
banked memory...and TWO floppy drives. And the icing on the cake....a built in mind-blowingly fast 300 baud modem! I was looking at a Kaypro and an Osborne....went for the more expensive 4P because of the awesome features. Spent about the same amount on a dot matrix printer to go with it. Throw in some software apps like Visicalc and ..of course...a DPM operating system... and the incredibly powerful packaged was about $3500 out the door. $3500 was a LOT of money in 1983....Whoohooo! Only 26lbs.
The TRS-80 Model 4P
The TRS-80 Model 4P (catalog number 26-1080) was a transportable version of the TRS-80 Model 4, released on November 15, 1983 for a starting price of $1799. This was …www.trs-80.org
Sneakers
Just sneakin' around....
Sounds familiar....
'cept I went with the Atari 800. And bought every peripheral available, every software manual, .... Used it to learn 8086 assembler language and coded my own telecom program for use with a 300 baud modem and our Control Data Cyber computers at work.Still have all of it boxed in the basement, still all works. Back then the 5.25" floppy drive was over $500. And each peripheral had it's own power cord and transformer, so there were a million cords all over the place plugged into a half dozen power strips.
I was a member of the First Osborne Group (FOG) BBS and the open-source code published there was amazing..for the time. I was programming in Z80 Assembler and 8086 soon after...and then had to turn around and learn it for the TI-9900. When we migrated to the 80C186/C187 chip set for our marine products, I was out of the controller programming side soon afterward. Still did a ton of simulation program development in Fortran though.Sounds familiar....
Still have all of it boxed in the basement, still all works. Back then the 5.25" floppy drive was over $500. And each peripheral had it's own power cord and transformer, so there were a million cords all over the place plugged into a half dozen power strips.
That was all ancient history. SGI does all our software now and I couldn't begin to help with that. He's like that guy in Dilbert...the company can never let him go because he developed all of the company's 1 million lines of spaghetti code that nobody else on the planet could decipher.
I'm pretty sure my old 4P is stored in my sister's basement...I gave it to her to use and she never throws anything away.
Anybody want some old Silicon Graphics boards?