VOGONS

Search

Common searches

Mystery 'Six Pack' Clone Switch Settings?

Topic actions

First post, by Tempest

Posted on 
User metadata
Rank Member
Rank
Member

I have a weird Six Pack clone that says Multitech MFB-PC on it. I can't find any information on it, much less a diagram for the switch settings. Can anyone point me in the right direction or tell me what the appropriate switch settings would be for a 640KB IBM 5150? What its set to right now seems to work, but I'm not sure if it's actually correct or not.

The reason I ask is that my system seems to be crashing a lot lately and I'm wondering if it's this card or something else that's amiss like the power supply.

http://atariprotos.com/temp/mystery.jpg

--- AtariProtos.com ---
For when excellence and burnished fineries need to gently visit the warmth of your tablery

Reply 1 of 6, by Horun

Posted on 
User metadata
Rank l33t++
Rank
l33t++

Sorry a quick search gave no documentation or any other pictures of similar Memory+IO card...
Just guessing: SW1 is the memory size and starting address, SW2 is for the Serial and Parallel ports.
Can you post a picture of the back of the card ? I had to decode switches on a few things before and have been fairly lucky.

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 2 of 6, by Tempest

Posted on 
User metadata
Rank Member
Rank
Member
Horun wrote on 2022-05-28, 23:00:

Sorry a quick search gave no documentation or any other pictures of similar Memory+IO card...
Just guessing: SW1 is the memory size and starting address, SW2 is for the Serial and Parallel ports.
Can you post a picture of the back of the card ? I had to decode switches on a few things before and have been fairly lucky.

Sure here you go:

http://atariprotos.com/temp/mystery2.jpg

I'm not using the serial or parallel port part of the card so I'm not worried about that. Of course if I have the card set to use them and they're not attached then maybe that's causing my problem? It's got to either be this card or my power supply.

No one seems to have any info on this card. All I've been able to find out is that Multitech changed their name to Acer after a short time.

--- AtariProtos.com ---
For when excellence and burnished fineries need to gently visit the warmth of your tablery

Reply 3 of 6, by Horun

Posted on 
User metadata
Rank l33t++
Rank
l33t++

Thank, I will try to figure out a bit later after chores and dinner with the family.
Yes it seems lot of older Multitech stuff disappeared and Total hardware barely covers anything they made.

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 4 of 6, by Tempest

Posted on 
User metadata
Rank Member
Rank
Member
Horun wrote on 2022-05-28, 23:39:

Thank, I will try to figure out a bit later after chores and dinner with the family.
Yes it seems lot of older Multitech stuff disappeared and Total hardware barely covers anything they made.

Thanks, I really appreciate it.

--- AtariProtos.com ---
For when excellence and burnished fineries need to gently visit the warmth of your tablery

Reply 5 of 6, by Horun

Posted on 
User metadata
Rank l33t++
Rank
l33t++

Don't get your hopes up. Just did a quick front - back image compare and appears there could be a hidden layer of the PCB with some signal traces that cannot be easily followed.
Will give me something to look over for the next few days... like puzzles 😀

Attachments

  • combined_small.jpg
    Filename
    combined_small.jpg
    File size
    603.76 KiB
    Views
    314 views
    File license
    Public domain

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Go to top of page Go to top of page
Back to General Old Hardware
Close window
Close window