. .

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. 03-10-2015 #14
    Robin Hewitt's Avatar
    Lives in Seaford, Sussex, United Kingdom.
    Robin Hewitt
    Last Activity: 3 Days Ago Has a total post count of 1,618. Received thanks 109 times, giving thanks to others 7 times. Is a beta tester for Machinists Network features. Referred 1 members to the community.
    Takes me back...

    C:\>debug
    -d40:0
    0040:0000 F8 03 00 00 00 00 00 00 - 78 03 00 00 00 0B 02
    -q
    C:\>

    Meaning one serial port at 03f8h and one parallel port at 0378h so if you wrote to 0378h your data would be on the pins in microseconds if not faster.

    Of course you were supposed to access it via the BIOS, not that that would slow it down much.

    It only really goes tits up when writing to 0378h causes an interrupt that will join the queue to sort the mess out at some nebulous time in the future.
    Last edited by Robin Hewitt; 03-10-2015 at 10:36 PM.
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Mach3
    By petesos in forum Artsoft Mach (3 & 4)
    Replies: 3
    Last Post: 23-10-2012, 10:18 PM
  2. Mach3 and LCD
    By dzero in forum General Electronics
    Replies: 3
    Last Post: 30-07-2012, 12:50 PM
  3. mach3 goes off the bed
    By swinds in forum Artsoft Mach (3 & 4)
    Replies: 8
    Last Post: 17-01-2012, 11:43 PM
  4. mach3
    By edgas10 in forum Artsoft Mach (3 & 4)
    Replies: 5
    Last Post: 27-04-2011, 11:18 PM
  5. MPG and Mach3
    By GeoffV in forum Artsoft Mach (3 & 4)
    Replies: 13
    Last Post: 08-10-2010, 05:56 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules