INMC News

  

Autumn 1979, Issue 4











Page 14 of 30











In BASIC it is similar to the above

10       REM REAL TIME INPUT FOR NAS-SYS 1
20 DATA 25055,1080,-53,536,-20665,3370,-5664,0
30 DOKE 4100,3200: FOR I9=3200 TO 3214 STEP 2
40 READ I8: DOKE I9,I8: NEXT

The routine is used exactly as for NASBUG.

Just one more for NAS-SYS users, you will have noticed (and been annoyed by) the fact that you can’t ‘PRINT’ on the top line of the screen. The is an unfortunate consequence of the cursor control of NAS-SYS. You get round it this way:

10 REM PLACING TITLES ON LINE 16 USING NAS-SYS 1
20 Z$="TITLE": FOR Z=1 TO LEN(Z$)
30 POKE Z+Z1,ASC(MID$(Z$,Z,1)): NEXT

Note that Z1 is the start address on the top line
Min. value of Z1 = 3017
Max. value of Z1 = Z1+LEN(Z$) < 3065

So enough about the 8K BASIC for one session, it’ll be a some time before many of you get round to using this bumpf, and by then you’ll have used this newsletter for firelighters anyway. So don’t forget our back issues service folks.

LITTLE KNOWN FACTS THAT NO-ONE SEEMS TO CARE ABOUT (4)

Did you you know that if the TV sync. slips when displaying your Nascom, or that if you are lacking video drive to your monitor; that you could hang a 470R preset pot across the cathodes of D1 and D2 (a diode ‘points’ to the cathode by the way) and, having removed R8 and R9, feed the wiper of the pot to the modulator or monitor. Tweak for best sync versus best contrast.

LITTLE KNOWN FACTS THAT NO-ONE SEEMS TO CARE ABOUT (5)

Did you know that if you fit the NMI generator described in INMC News 2, and make the leads too long, then spurious NMIs can be caused. Every time I turned the tape recorder off, so the damn thing would do multiple NMIs in the keyboard routine. Now you can’t restart from an NMI in the keyboard routine!!! Sod’s Law says that by having a multiple NMI you’ll have screwed up something.


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











Page 14 of 30