Forum Rules and Etiquette

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This forum is part of our mission to promote the preservation of vintage computers through education and outreach. (In real life we also run events and have a museum.) We encourage you to join us, participate, share your knowledge, and enjoy.

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Rule 1: Remain civil and respectful

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Conduct yourself as you would at any other place where people come together in person to discuss their hobby. If you wouldn't say something to somebody in person, then you probably should not be writing it here.

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To put things in engineering terms, we value a high signal to noise ratio. Coming here should not be a waste of time.
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Rule 4: "PM Sent!" messages (or, how to use the Private Message system)

This forum has a private message feature that we want people to use for messages that are not of general interest to other members.

In short, if you are going to reply to a thread and that reply is targeted to a specific individual and not of interest to anybody else (either now or in the future) then send a private message instead.

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Why do we have this policy? Sending a "PM Sent!" type message basically wastes everybody else's time by making them having to scroll past a post in a thread that looks to be updated, when the update is not meaningful. And the person you are sending the PM to will be notified by the forum software that they have a message waiting for them. Look up at the top near the right edge where it says 'Notifications' ... if you have a PM waiting, it will tell you there.

Rule 5: Copyright and other legal issues

We are here to discuss vintage computing, so discussing software, books, and other intellectual property that is on-topic is fine. We don't want people using these forums to discuss or enable copyright violations or other things that are against the law; whether you agree with the law or not is irrelevant. Do not use our resources for something that is legally or morally questionable.

Our discussions here generally fall under "fair use." Telling people how to pirate a software title is an example of something that is not allowable here.

Reporting problematic posts

If you see spam, a wildly off-topic post, or something abusive or illegal please report the thread by clicking on the "Report Post" icon. (It looks like an exclamation point in a triangle and it is available under every post.) This send a notification to all of the moderators, so somebody will see it and deal with it.

If you are unsure you may consider sending a private message to a moderator instead.

New user moderation

New users are directly moderated so that we can weed spammers out early. This means that for your first 10 posts you will have some delay before they are seen. We understand this can be disruptive to the flow of conversation and we try to keep up with our new user moderation duties to avoid undue inconvenience. Please do not make duplicate posts, extra posts to bump your post count, or ask the moderators to expedite this process; 10 moderated posts will go by quickly.

New users also have a smaller personal message inbox limit and are rate limited when sending PMs to other users.

Other suggestions
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DIY Floppy/Serial and Audio ISA cards

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    DIY Floppy/Serial and Audio ISA cards


    As I mentioned earlier I've been working on an ISA Floppy Disk and Serial controller card. Recently I received PCBs from the fab. I also have some PC8477BV-1 FDC ICs to go with these PCBs. Note that PC8477BV-1 are not new but in working order (I tested them).

    - ISA Floppy Disk and Serial controller PCB - $10
    - PC8477BV-1 (in addition to a PCB) - $3

    I also have some ISA OPL2 PCB - my version of an Adlib compatible audio card PCBs. They are also $10 each.

    Shipping with USPS first class mail (no tracking) for one PCB + FDC chip: in US - $3, and anywhere else - $5. Please contact me for the shipping price if you need more than one PCB or if you want to use different shipping service.

    PM me if you like to get some of these PCBs.

    More information:

    This is a completely hobby project, and I am not making any profit from it, and that even not counting many hours I spent designing these boards. Therefore the support is limited - I will try to help as much as I can, but I won't provide any refunds for non-working boards. There is no warranty whatsoever. I did try to do my best when designing these boards and they work for me and for anyone else who already built them. These projects assume basic skills with building electronic circuits (e.g. recognizing electronic components; soldering). If you're able to assemble an intermediate level Velleman kit, you probably will be able to built these boards too...


    PCB and PC8477.jpg

    ISA FDC - Complete Board -.jpg

    ISA OPL2 - Complete Board.jpg
    Last edited by sergey; January 23, 2013, 12:13 AM.

    I have to admit, that is sexy. I may take you up on the ad-lib board.
    It is a mistake to think you can solve any major problems just with potatoes.


      I still need to finish my OPL2 card - I stalled on it when I realized that I still had a few weeks to wait for delivery of the synth chips (which I've now had for going on two months)

      That ISA/serial board looks cool too, and I think I have everything needed in the parts bin with the exception of the caps and the oscillators. Hmmmmmmmmmmmm.....

      Sergey, out of curiosity, is this using the same BIOS that you were working on for XT-FDC, or is that BIOS a derivative of this one which will have more features? - ie will this board support 4 floppy drives, 8" drives, etc in the future?
      Currently seeking:
      * Roland MPU-401/AT (with daughter card header)
      * Magitronic K-156 Keyboard (5pin DIN w/ XT-AT switch)
      I also collect PC and C64 Sierra On-Line software!


        Originally posted by Maverick1978 View Post
        out of curiosity, is this using the same BIOS that you were working on for XT-FDC, or is that BIOS a derivative of this one which will have more features? - ie will this board support 4 floppy drives, 8" drives, etc in the future?
        The new BIOS version (2.0) supports both XT-FDC and ISA Floppy disk and serial card. Of course with ISA Floppy disk and serial card it will be limited to two drives and primary FDC configuration (IO at 3F0h, IRQ6, DRQ2). But it is possible to have both cards in the system with XT-FDC configured as the secondary controller, in this case the single instance of BIOS will support both cards (no need to install two EEPROMs).