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  • falter's Avatar
    Today, 08:09 PM
    Weird one - I'm trying to put this 5162 back together and away so I can finish rearranging my space, and I tried booting off the floppy drive, only...
    0 replies | 6 view(s)
  • falter's Avatar
    Today, 02:17 PM
    falter replied to a thread Microkit 8/16 in Other
    Thanks Dave! Sorry I've dropped off on the Netronics setup! Work + covid have made things a little crazy. I appreciate your efforts with this. ...
    76 replies | 4869 view(s)
  • falter's Avatar
    October 31st, 2020, 10:53 AM
    falter replied to a thread Netronics Explorer 85 in Other
    Also it looks like there was some repair work done with the innermost S100 slot.. he's got jumper wires there that appear to connect the same points...
    25 replies | 869 view(s)
  • falter's Avatar
    October 31st, 2020, 10:49 AM
    falter replied to a thread Netronics Explorer 85 in Other
    Ok so we have a wire going from J2 pin 22 (? there aren't 24 pins but 24 is right next to the last pin in the line) to pin 33 of U105 We have a wire...
    25 replies | 869 view(s)
  • falter's Avatar
    October 29th, 2020, 10:49 PM
    I was looking at something like this: https://www.ebay.com/itm/293272782936 The Microbee uses an external brick supply, so I suppose that's...
    15 replies | 580 view(s)
  • falter's Avatar
    October 29th, 2020, 10:49 AM
    falter replied to a thread Netronics Explorer 85 in Other
    No worries. I think we have something custom going on here.. I'm poring over schematics and comparing to these jumper wires he has around. I note...
    25 replies | 869 view(s)
  • falter's Avatar
    October 29th, 2020, 08:29 AM
    falter replied to a thread Netronics Explorer 85 in Other
    Hi Dave, Unfortunately I had some family events so I didn't get to play with the Netronics machine much at all. I did install a 74LS20 (a few of...
    25 replies | 869 view(s)
  • falter's Avatar
    October 28th, 2020, 12:50 PM
    falter replied to a thread Netronics Explorer 85 in Other
    Yes switches are set as you prescribed. C000 is in U300.. and it goes on from there. Here's a pic of the full board: ...
    25 replies | 869 view(s)
  • falter's Avatar
    October 28th, 2020, 09:34 AM
    falter replied to a thread Netronics Explorer 85 in Other
    The EPROMs are four 2716s. I was comparing the first of them, labeled C000-C7FF to what is actually showing up at C000-C7FF.
    25 replies | 869 view(s)
  • falter's Avatar
    October 27th, 2020, 10:21 PM
    I just purchased some Microbee stuff and they are 220v. So I was wondering what I should be looking for in terms of wattage and quality for a 110v...
    15 replies | 580 view(s)
  • falter's Avatar
    October 27th, 2020, 08:35 PM
    falter replied to a thread Netronics Explorer 85 in Other
    Okay so I set the jumpers both ways you mentioned above... but yeah.. no change. I decided just to do some perfunctory checks and verified the...
    25 replies | 869 view(s)
  • falter's Avatar
    October 27th, 2020, 09:07 AM
    falter replied to a thread Netronics Explorer 85 in Other
    Thanks Dave. The revision of my board is D. I can edit memory contents in the space you mentioned.. just not anywhere else. Interestingly,...
    25 replies | 869 view(s)
  • falter's Avatar
    October 26th, 2020, 10:46 AM
    falter replied to a thread Netronics Explorer 85 in Other
    And yes, I can use the monitor and attempt to edit memory contents but at $0000 and most ranges I've tried I cannot actually edit anything. I'm...
    25 replies | 869 view(s)
  • falter's Avatar
    October 26th, 2020, 09:44 AM
    falter replied to a thread Netronics Explorer 85 in Other
    I am keeping well, all things considered. Trust same for you? And you don't owe me anything! But I very much appreciate your help and insight for...
    25 replies | 869 view(s)
  • falter's Avatar
    October 25th, 2020, 09:07 PM
    falter started a thread Netronics Explorer 85 in Other
    I finally got one of my holy grails.. an Explorer 85 in the actual Netronics chassis. It fires up and the monitor seems to work fine. It appears...
    25 replies | 869 view(s)
  • falter's Avatar
    October 25th, 2020, 08:03 PM
    Yes it was u98.. closer to the FDC.
    93 replies | 7404 view(s)
  • falter's Avatar
    October 25th, 2020, 11:18 AM
    Yeah the tops of some of the legs of the ICs have some surface rust, but the legs themselves seem to be fine and same with sockets where applicable. ...
    93 replies | 7404 view(s)
  • falter's Avatar
    October 25th, 2020, 09:55 AM
    Not a problem at all -- I appreciate all the suggestions/help very much. Here's the high res shots of the board: ...
    93 replies | 7404 view(s)
  • falter's Avatar
    October 24th, 2020, 07:31 AM
    Pin 3 seems to be 4mhz.. so.. yeah. I'm curious if all original 1000 boards had all these little jumper wires. The 74ls04 I replaced had three...
    93 replies | 7404 view(s)
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About falter

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About falter
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Vancouver, BC

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Recent Entries

MPI 360k won't read/write

by falter on August 17th, 2019 at 11:18 AM
Quote Originally Posted by Chuck(G) View Post
I can't say that for certain. The head assembly is a complex system. The only way to have an inkling is to use something like IMD and check each head individually.
IMD says RPM are 272... should be 300 right?
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74LS244 Question

by falter on December 5th, 2018 at 01:21 PM
Quote Originally Posted by Chuck(G) View Post
Assuming that pin 1 stays high, it should be possible to "feed through" pin 8 to pin 12. But the solution ultimately will be figuring out why pin 1 stays high.
Yeah that is is the goal for sure. I just want to prove out my theory a bit. After the experience with the TVT I don't trust schematics or circuit descriptions 100%. I did try feeding through but didn't see any text appear... although I didnt type anything so maybe it would only change new text being added. I'm

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The Ebay Follies

by falter on June 25th, 2017 at 11:09 AM
All hail the $3000 Apple II+!

http://www.ebay.com/itm/142424958928
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