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Full Discussion: GIF Anim of my AMIGA real Oscilloscope.
The Lounge What is on Your Mind? GIF Anim of my AMIGA real Oscilloscope. Post 302981868 by wisecracker on Tuesday 20th of September 2016 05:13:05 PM
Old 09-20-2016
Quote:
Originally Posted by Corona688
Very nice. It's kind of a shame parallel port phased out when it did -- and that they only bothered making it fully bidirectional in its last, dying days. It was far and away the fastest protocol a hobbyist had for anything small or embedded.
The bizarre thing is it could not beat the AMIGAs port for both speed and flexibility. I only coded for SPP mode though, ECP and EPP modes I ignored as SPP was definitive for _all_ PCs at the time. You could actually FORCE bi-directionality on an IBM XT SPP but was a risky thing to do as damage to the port could occur; but it was possible. The XTs serial port was bomb proof. A have an AD converter built for the SPP along with 8086 assembly code to access it by grabbing two nibbles and creating a byte from them. Not particularly fast but well good enough for most applications.

See attached...

Hmm, just thought I still have my ancient quad core with an ECP parallel port. I wonder what it would be like using shell scripting to access the AD converter.

Gimme a bit of time and I will let you guys on here know...
GIF Anim of my AMIGA real Oscilloscope.-brdlowerjpg
GIF Anim of my AMIGA real Oscilloscope.-brdupperjpg
PARAPORT.ASM.TXT (3.8 KB) 
This User Gave Thanks to wisecracker For This Post:
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