QuickBasic Cafe Forum

Success at last!

I found some documentation on the control register, and use pins 12 and 14; they have to be pulled low with a resistor to ground. I've experiemented, and found that the highest resistance I can use is right around 1.4k ohms.

This presents just a minor problem: instead of just ...

What I have in mind is a low-cost timing setup, used to measure the time between two events -- both of which would be the interruption of a light beam. Extreme accuracy isn't necessary -- 0.01 seconds would be fine, so no high-speed industrial stuff needed.

I want to measure the amount of time a ...

Great news about port 966, did you try 956?.



D'oh! Maybe that explains the screen color weirdness. Yes, it's a typo, and it's in the code. So when I 'try' 956, I'm back to where I was.

The more I read about this, the more confusing it gets...

I'll be happy if I can just find a way to read ...

Aha! Results.

I used a DOS 6.22 diskette, booted into DOS and used Valerie's code, and it worked just like it was supposed to.

I modified it a bit:

defint d,o,p,x
portid=966

DOG:
CLS
d% = INP(portid) : PRINT d%
print "*" inp (portid)
out portid,118
print INP(portid)

for x=1 to 221
OUT portid,x ...

I think your calculation of 956 being the port address is incorrect. 956 is possibly being written to by the system thereby returning decimal 255 every time.

Actually the 956 is correct, normal for an IBM Thinkpad. I can go into Device Manager and examine LPT1, and the resources listed are 03BC ...

Not really having much luck here. To avoid any NT complications, I'm using a DOS 6.22 boot disk, running in strictly DOS, and adjusted the code like this:

defint d,o

DOG:
CLS
d% = INP(956) : PRINT d%
o% = 118 : OUT 956,o%
d% = INP(956) : PRINT d%
o% = 23 : OUT 956,o%
d% = INP(956): PRINT d%
END ...

OK, I downloaded 4.5. Haven't played with it much yet, but it looks like it has quite a number of new features to explore & play with. The HELP is built-in now! I'll still keep my manual -- all 8 pounds of it, or whatever it weighs...

Anyway -- apart from the mistake in line 4 (there should be d ...

I've read several forums and they all seem to agree on the way to output data to the parallel port, using OUT. Makes sense.

The question, then, is: why doesn't this work?

956 = output port on an IBM laptop.

d%=inp(956)
print d%
o%=118 : out 956,o%
d=inp(956) : print d%
o%=23 : out 956,o%
d%=inp ...

Notice that, by right-clicking on the icon, selecting Properties, selecting the Screen tab, then Full Screen, QB will open with a full screen, from there on. One can always go back and select the Window option as the start-up default.

Geez, I've been here about six minutes and I've already ...