Hjalfi writes Hello World for CP/M seven times

In which yr hmbl svt fills a floppy disk with 1980s programming languages for a 1977 operating system and uses a 1990s laptop to write the same program seven times. Plus Zork.

The demonstrated compilers/interpreters are:

- Microsoft Cobol-80 (ibid)
- Turbo Pascal (ibid)
- Microsoft Basic (ibid)

Yes, it really did all fit on a single floppy disk.

[hjalfi]

If you were lucky enough to see the version of this where the Cobol compilation went wrong and I muttered about fixing it in post and then did a retake, I forgot to fix it in post. I have now fixed it in post. Have a nice day.

[axardon]

Just bought one NC 200 on eBay because of this :-) Great video and keep up the good work.

[tergav]

Sweet, i'm going to have to get my hands on one of those laptops sometime. Never knew CP/M was so versatile.

[TSteffi]

Man, I just recently ported CP/M Plus to John's Z80 Retro board, and it's so much fun.
The feeling of running your own OS, you wrote the BIOS yourself, you know how every byte moves through the registers.
This is the first video of yours I have been recommended, and I really hope you have done more CPM stuff since then

[igotes]

It amuses me that apart from ASM and C, the Hello world binaries are larger than the OS.
A friend of mine had one of these in school because he had a learning difficulty of some sort. Since we were 80s kids and very familiar with BASIC, it was a lot of fun. I'm here from a link in an article on The Register, by the way!

[Philip]

Even though I've never used CP/M in my life (I started with DOS), I find myself compelled to make a homebrew computer and the simplicity of CP/M makes it an obvious candidate.

[another]

Excellent video, many thanks for all the work. I have an NC100, but I'm keeping an eye out for a NC200 at a reasonable price. The price of most "Retro" tech has skyrocketed in the last few years. 🙁

[joseph_donovan]

Love it, love it, love it! More please! Thank you so much. A delightful treat! Thanks a million for posting.

[Zealbit]

Awesome video!
I am quiet surprised with the C compiler speed. I was expecting it to be slower. I guess it will become slower when the files get bigger.
I love the computer too, the keyboard sounds comfortable to use!

[stalepalemale]

Really great video, never used CP/M back in the day, jumped onto DOS around version 3.3. Used to do alot of dbase/clipper back in the day and didnt reslise DBase II ran on CP/M also.

[McDutchie]

Thanks mate, that was fun! I spent years of my life in the MSX2 port of that very Turbo Pascal IDE as a teenager. (MSX-DOS was CP/M compatible.) I even wrote a graphics library for it, which I distributed on floppy disks just like yours. :) Never seen a Z80 laptop up close, though.

Re 12:10, I don't believe you could possibly have invoked the Fortran compiler with the Cobol command. Seems to me that the command at 10:37 simply didn't overwrite the previous Fortran compiled file.

[ChilapaOfTheAmazons]

Great video!

Thank you for a clear view of the screen. 😀

[TheDarkplace]

My NC200 got me through the first half of my degree. It's still in lovely condition and I'm hoping to use it more.
Just researching battery choices now.
I'm thinking NI-ZNK AA's in C adapters.

[davidgari]

Luxury!
Of course, we had it bad...
Try an Altair 8800 with 80KB capacity 8" hard-sectored floppies running AltairOS; or how about a NorthStar Horizon with 90KB 5.25" (also hard-sectored) floppies running N*DOS? As I recall, neither OS had Dynamic File Allocation.


Thanks for the memories of a time when computers waited for us instead of the other way 'round.

[ncot_tech]

Seeing COBOL gave me flashbacks to one of the units we did at college. Horrible language.
Next challenge - put CP/M on that machine's ROM instead of the Amstrad stuff that's in it :)

[RetroComputingwithMike]

Can you maybe upload the image for that floppy somewhere? O:)

[Izavos]

Mr and a beautiful work beautiful computer very well maintained.
Congratulations.
I was a user of Apple IIe with CPM / 80 card with various system programs. Could I download a program like turbo.com "Turbo Pascal" from your machine and copy it to my old Apple IIe and use or systems are different ???

[DennisdeWeerd]

Hi, is there a link available to this version of cp/m for the nc200? I have used zcn, but that version is more geared towards the NC100.

[ultraveridical]

Nowadays a hello world application in a modern language is likely to be 720k+

[erwing.]

What about preparing yout floppy disk?
Did you only put a bootable image of cp/m on it, which can be started with "Function + R", and that´s it?
Or had you to format, prepare, write the floppy disk in a special bootable way for the NC200? Thank you.