Announcement

Collapse

Forum etiquette

Our mission ...

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.

This forum has been around in this format for over 15 years. These rules and guidelines help us maintain a healthy and active community, and we moderate the forum to keep things on track. Please familiarize yourself with these rules and guidelines.


Remain civil and respectful

There are several hundred people who actively participate here. People come from all different backgrounds and will have different ways of seeing things. You will not agree with everything you read here. Back-and-forth discussions are fine but do not cross the line into rude or disrespectful behavior.

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.

This should be obvious but, just in case: profanity, threats, slurs against any group (sexual, racial, gender, etc.) will not be tolerated.


Stay close to the original topic being discussed
  • If you are starting a new thread choose a reasonable sub-forum to start your thread. (If you choose incorrectly don't worry, we can fix that.)
  • If you are responding to a thread, stay on topic - the original poster was trying to achieve something. You can always start a new thread instead of potentially "hijacking" an existing thread.



Contribute something meaningful

To put things in engineering terms, we value a high signal to noise ratio. Coming here should not be a waste of time.
  • This is not a chat room. If you are taking less than 30 seconds to make a post then you are probably doing something wrong. A post should be on topic, clear, and contribute something meaningful to the discussion. If people read your posts and feel that their time as been wasted, they will stop reading your posts. Worse yet, they will stop visiting and we'll lose their experience and contributions.
  • Do not bump threads.
  • Do not "necro-post" unless you are following up to a specific person on a specific thread. And even then, that person may have moved on. Just start a new thread for your related topic.
  • Use the Private Message system for posts that are targeted at a specific person.


"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.

Here are some obvious examples of when you should not reply to a thread and use the PM system instead:
  • "PM Sent!": Do not tell the rest of us that you sent a PM ... the forum software will tell the other person that they have a PM waiting.
  • "How much is shipping to ....": This is a very specific and directed question that is not of interest to anybody else.


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.

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
  • Use Google, books, or other definitive sources. There is a lot of information out there.
  • Don't make people guess at what you are trying to say; we are not mind readers. Be clear and concise.
  • Spelling and grammar are not rated, but they do make a post easier to read.
See more
See less

PS/2 Model 25-286 ISA Riser

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • TheDrip
    replied
    @luckybob, email incoming with Gerbers and info.

    Leave a comment:


  • luckybob
    replied
    Originally posted by TheDrip View Post
    As for the 30-286 riser, it's electronically compatible, but physically it won't fit. The model 30 riser is 3 slots tall and runs into the bottom of the monitor casing.

    Theoretically you can sawzall off the top slot to make it work in the 25 but no one seems willing to do that!
    i've done it. It doesnt work.

    so i'm in the market for one or two of these boards. ^.^

    Leave a comment:


  • whaka
    replied
    edit : i speaked too fast

    Leave a comment:


  • ajacocks
    replied
    Thanks, @TheDrip. I was thinking of the reverse, using your riser in the model 30-286. That should fit fine.

    Since your riser is superior to the stock riser, it'd be a great upgrade in that machine, too.

    - Alex

    Leave a comment:


  • TheDrip
    replied
    As for the 30-286 riser, it's electronically compatible, but physically it won't fit. The model 30 riser is 3 slots tall and runs into the bottom of the monitor casing.

    Theoretically you can sawzall off the top slot to make it work in the 25 but no one seems willing to do that!

    Leave a comment:


  • TheDrip
    replied
    PM me your email and I will get the Gerbers and GAL files over to you.

    I will also get your address for sending over bits 'n pieces.

    Leave a comment:


  • ajacocks
    replied
    This is really nice work, @TheDrip! I’ll have to open up my 25sx and check the riser in it.

    I’d like one of your PCBs, either assembled, kit, or bare, whatever you are interested in doing. I’d also like to see your Gerbers.

    Have you looked at the model 30-286 riser? I’d assume that they would be very similar or identical.

    - Alex

    Leave a comment:


  • TheDrip
    replied
    I got out the boroscope and inspected the inside of the case with everything put together. Definitely not enough room for a 4th slot. The chassis on the Eduquest must be different.

    Leave a comment:


  • TheDrip
    replied
    Not mine, images of an original Eduquest riser showing two slots on the backside.
    s-l1600.jpg
    s-l1600.jpg

    Leave a comment:


  • TheDrip
    replied
    I found that some Eduquest machines had FOUR Isa slots with an extra on the backside. I have to double check if that will physically fit in my case, but if so I will add the 4th slot to the re-spin with the corrected IO R/W and have new boards made.

    Leave a comment:


  • TheDrip
    replied
    I will double check the DRC I used, but I believe it was 6/6

    Leave a comment:


  • whaka
    replied
    interesting
    which trace width and the lowest space between trace did you use ?

    Leave a comment:


  • bladamson
    replied
    Pretty snazzy!

    Ya beat me to it, lol.

    Leave a comment:


  • TheDrip
    replied
    No issue from me. No one else has even replied so there is really no thread to derail!

    Leave a comment:


  • Theoryboy
    replied
    Sorry, it was more an out loud thought of mine comparing it to the PS1 2011 286. XTIDE wont work unless its a very specific version. Didn't mean to derail the thread.


    Originally posted by TheDrip View Post
    The xt-ide was working with the original riser. I have it's eprom mapped to C800 through CA00. My riser doesn't do anything strange to the xt-ide, other than I have it mounted in the upside down slot on the back of the riser.

    The UMB provider is only mapped for 88k from CA00 to E000 which is where the PS2 BIOS begins (it is 128k)

    Leave a comment:

Working...
X