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barcher174
Joined: 07 Dec 2012
Posts: 607
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 Posted: Sun Mar 04, 2018 1:46 am Post subject: New ADB Soundbox replacement |
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Hi All,
Thought I'd post a little teaser of a project I've been working on. I call it the NoSoundADB board. Basically it's an ADB sound board without the sound.
Keyboard and mouse work perfect. Now I'm focusing on video. |
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eagle
Joined: 29 Mar 2006
Posts: 456
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| Posted: Sun Mar 04, 2018 7:03 am Post subject: |
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That's a very neat project.
I think it's exciting to see the new projects going on, from this one to the NeXT-USB adapters.
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My NeXTs:
NeXT Computer prototype (68030-25 x2, 68040-25)
Two NeXTstations (68040-25)
All mono |
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Rob Blessin Black Hole
Site Admin
Joined: 05 Sep 2006
Posts: 689
Location: Ft. Collins, Colorado
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| Posted: Sun Mar 04, 2018 10:38 pm Post subject: |
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Hello Brian: Awesome stuff , let me know when they are ready and will there be a non adb version as well? Best Regards Rob Blessin
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Rob Blessin President computerpowwow ebay sales@blackholeinc.com http://www.blackholeinc.com
303-741-9998 Serving the NeXT Community since 2/9/93 |
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barcher174
Joined: 07 Dec 2012
Posts: 607
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| Posted: Mon Mar 05, 2018 1:51 am Post subject: |
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| I would like to eventually do something similar for the non-ADB, but that will be more complicated. Personally I almost never use sound on my systems anyway. Giving that up simplifies the problem tremendously. |
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barcher174
Joined: 07 Dec 2012
Posts: 607
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| Posted: Mon Mar 05, 2018 10:47 pm Post subject: |
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Did some additional work tonight. Everything seems to be working now. I'll need a board revision with some fixes.
A couple notes:
1) this device will fail the sound test at boot. This should be disabled in the PROM. This is the default state.
2) The original next straight cables may not have the ADB pin connected. I think all the Y cables are fine. I forgot this and wasted a lot of time....
I'm pretty happy with the results overall. |
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krazycat
Joined: 18 Feb 2017
Posts: 35
Location: Europe
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| Posted: Tue Mar 06, 2018 9:14 am Post subject: |
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Great project, very useful since the original Soundboxes are so rare. If you produce the NON-ADB version, I would buy two (and two megaloads)  |
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Andreas
Joined: 27 Dec 2005
Posts: 356
Location: Germany
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| Posted: Tue Mar 06, 2018 9:24 am Post subject: |
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| this thingy does only work for the mono turbo slab since others doesn't support ADB devices? |
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barcher174
Joined: 07 Dec 2012
Posts: 607
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| Posted: Tue Mar 06, 2018 9:52 am Post subject: |
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| Andreas wrote: | | this thingy does only work for the mono turbo slab since others doesn't support ADB devices? |
Correct, this requires a turbo system: mono, color, or cube. The video out will not work on a color system. |
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bobo68
Joined: 03 Jun 2015
Posts: 213
Location: Germany
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| Posted: Tue Mar 06, 2018 10:44 am Post subject: |
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| barcher174 wrote: | | I would like to eventually do something similar for the non-ADB, but that will be more complicated. Personally I almost never use sound on my systems anyway. Giving that up simplifies the problem tremendously. |
Why is that so? Isn't it just some other pins you need to route from the DB-19 connector to the keyboard output? |
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barcher174
Joined: 07 Dec 2012
Posts: 607
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| Posted: Tue Mar 06, 2018 11:24 am Post subject: |
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| The non-adb signal needs to be syncronized to monitor clock. I think I recall it working at 5mhz which complicates using a microcontroller. |
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bobo68
Joined: 03 Jun 2015
Posts: 213
Location: Germany
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| Posted: Tue Mar 06, 2018 11:37 am Post subject: |
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| barcher174 wrote: | | The non-adb signal needs to be syncronized to monitor clock. I think I recall it working at 5mhz which complicates using a microcontroller. |
You mean one has to pick up the signal from the keyboard and mouse and then sync it with the monitor clock to pass it to the NeXT? |
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barcher174
Joined: 07 Dec 2012
Posts: 607
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| Posted: Tue Mar 06, 2018 3:17 pm Post subject: |
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| bobo68 wrote: | | barcher174 wrote: | | The non-adb signal needs to be syncronized to monitor clock. I think I recall it working at 5mhz which complicates using a microcontroller. |
You mean one has to pick up the signal from the keyboard and mouse and then sync it with the monitor clock to pass it to the NeXT? |
I'm hoping that's all there is to it, yes. |
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Rob Blessin Black Hole
Site Admin
Joined: 05 Sep 2006
Posts: 689
Location: Ft. Collins, Colorado
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barcher174
Joined: 07 Dec 2012
Posts: 607
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| Posted: Mon Mar 12, 2018 8:11 pm Post subject: |
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New board came today:
Keyboard and mouse are working well. The video seems a bit fuzzy, but that could be my cable and not the board. I'll need a properly shielded cable to confirm. Either way, the video is probably not very useful anyway.
So where to go from here? Well at this point I'm not going to waste the 19pin connectors on this board. I've gotten quite a bit of encouragement to move on to the non-ADB version. Nothing is wasted because I'll need everything I learned here to continue on. As I stated before, this becomes a software problem as well as a hardware one. In addition the megaload functionality will be integrated into the board as well (that part is easy and already done). No promises on timeline, but I'll try to post updates when it's meaningful. |
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Andreas
Joined: 27 Dec 2005
Posts: 356
Location: Germany
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| Posted: Tue Mar 13, 2018 1:36 am Post subject: |
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| barcher174 wrote: | | Either way, the video is probably not very useful anyway. |
As far as i understood, this board makes it possible to power on a Turbo slab and use it with (Apple)? ADB keyb/mouse and VGA video - or not?
So i think the video-out is essential. |
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