INMC 80 News


May–September 1981, Issue 4

Page 13 of 71

I recently got a Centronics 737 printer and with the help of a m/c programming genius, a 74123 and a few bits of wire, built a parallel interface, using, of course, the PIO. (The Centronics 737 is a delight to use and the script is most definitely correspondance quality. The write up in the March 81 issue of Practical computing is very fair and I agree with it.)

Now, not a lot of people know this as its never been published before, (I think), but it is possible to insert printer control codes into Naspen with complete success!

I have read the NASPEN documentation countless times and there are absolutely no clues as to this capability.

Some codes appear to be a little tricky, ESCape for example, but if you use the little ‘i’ (insert), it works perfectly. I won’t provide a list as working them out for oneself helps to memorise them, but if anyone would like a list, an SAE will do the trick.

For those interested in how Nascoms are housed, mine for the first 8 months of its life was housed in a settee, complete with PSU. The keyboard cable came from within to the keyboard which used to sit on my knees and the whole setup was very domestic but portability was a real problem!

I eventually bought a Ball Miratel Monitor from Electronic Brokers and shovelled the whole lot in. It was a tight squeeze I can tell you. None the less in that tiny cabinet I have the VDU and all its PSUs, Nascom 2 and all its PSUs, a board to give me seperate vert. and horiz. sync which the monitor requires, a tape drive relay board, a sound board (for the dreaded space invaders), a board for the Sargon chess graphics and last but not least a board for the printer interface.

I would like a 48K board as well as the 32K board but that is absolutely out of the question unless I bring the Nasbus outside the Ball Miratel housing but as everything is contained at the moment it is very neat and tidy.

Finally, I have worked professionally with Ap*le, Sh*rp, P*t and the like, and in my opinion, Nascom is streets ahead of any of them!

C.R. Bruce, Farnham, Surrey.

Space Sounds.

Space invader freak’s may find this worth a try, it’s a bit messy and slows the action down quite a bit, but visitors seem to prefer the game with sound.

The only hardware mod. is to hook a speaker onto port 0, bit 5, (that’s IC 24 pin 15 for Nascom 2), via a suitable buffer of course.

I read somewhere that someone wanted an approximation to PI better than 22 over 7, how about 355 over 113?

This is an OCR’d version of the scanned page and likely contains recognition errors.

Page 13 of 71