Re: ADB KVM Switch?

[Powermac]

DR.Bott Monoswitch was the best 4 port one I have. I also have a 12 or 16 
port (forget which) Black Box ADB KVM (looks industrial) that had jumpers 
for each video output so you could set the correct video default for each 
machine without having to select it on the switch during power on. Both are 
hard to find these days, I have been collecting since 2000.



On Saturday, February 6, 2016 at 12:07:30 PM UTC-5, Wesley wrote:

> Were KVM (Keyboard/Video/Mouse) switches ever common for older Mac's with 
> ADB and DB-15 video?  I've got a 4-port PS/2 VGA KVM switch on my PC at 
> home, and I have an ADB/DB15 to PS2/VGA adapter that works with it...but I 
> would like to have the ability to hook up or two Mac's as well...long 
> story, but would be nice if I could switch the Mac's on the ADB/DB15 side.  
> Just searched a bit on ebay and couldn't find anything, which was kinda 
> surprising.  Does anyone have any insight?  maybe I just didn't come up 
> with the right search phrase?  Or maybe they just weren't a common item?
>  
> Thanks,
>  
> Wesley
>  
>

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Re: ADB KVM Switch?

['Gregg Eshelman' via Vintage Macs]

On 2/6/2016 12:06 PM, Tim Martin wrote:


I cannot remember ever daisychaining two macs to the same keyboard and
mouse. You provoke me to a test.


I once connected an ADB cable between two old Powerbooks. The results 
were that they'd swap apparently randomly back and forth with the 
trackball on one controlling the pointer on the other.


Why did I do that? It was in the very early days of my Macintosh 
experience and the ADB symbol looked to me like it could be for 
networking. "Hrmmm, Appletalk port maybe?"


At least nothing got fried!


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Re: ADB KVM Switch?

[Tim Martin]

Thanks for that experience Greg Eshelman - maybe I won't risk my venerable
wallstreet or quadra 800 on this experiment.
the wikipedia page on Apple Desktop Bus - penultimate section describes the
'apparently randomly swapping' if both CPU's were sending out polling calls
...
https://en.wikipedia.org/wiki/Apple_Desktop_Bus

Tim Martin

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On 6 February 2016 at 22:56, 'Gregg Eshelman' via Vintage Macs <
vintage-macs@googlegroups.com> wrote:

> On 2/6/2016 12:06 PM, Tim Martin wrote:
>
> I cannot remember ever daisychaining two macs to the same keyboard and
>> mouse. You provoke me to a test.
>>
>
> I once connected an ADB cable between two old Powerbooks. The results were
> that they'd swap apparently randomly back and forth with the trackball on
> one controlling the pointer on the other.
>
> Why did I do that? It was in the very early days of my Macintosh
> experience and the ADB symbol looked to me like it could be for networking.
> "Hrmmm, Appletalk port maybe?"
>
> At least nothing got fried!
>
>
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ADB KVM Switch?

[Wesley Furr]

Were KVM (Keyboard/Video/Mouse) switches ever common for older Mac's with
ADB and DB-15 video?  I've got a 4-port PS/2 VGA KVM switch on my PC at
home, and I have an ADB/DB15 to PS2/VGA adapter that works with it...but I
would like to have the ability to hook up or two Mac's as well...long story,
but would be nice if I could switch the Mac's on the ADB/DB15 side.  Just
searched a bit on ebay and couldn't find anything, which was kinda
surprising.  Does anyone have any insight?  maybe I just didn't come up with
the right search phrase?  Or maybe they just weren't a common item?
 
Thanks,
 
Wesley
 

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Re: ADB KVM Switch?

[Tim Martin]

If my memory is correct you didn't need switches since ADB was
daisychainable theoretically up to 128 devices all/most keyboards had two
sockets I have the old Kensington TrackBall which has two sockets. I do
remember some Apple video switches but I never bought or used one -
possibly because I thought them prohibitively expensive.

Almost all macs had two ADB ports as standard.

I remember doing jokey demonstrations for students with 3 or 4 keyboards
plugged in and more than one pointing device ... all on one device for
collaborative editing !!!

I cannot remember ever daisychaining two macs to the same keyboard and
mouse. You provoke me to a test.

I don't remember ever seeing an ADB switch. I still use the Griffin USB to
ADB converter when using my old 4-button Kensington Turbo Mouse with modern
machines.

ADB protocols continued to be available in machines with no ADB ports - the
trackpads on the first 17" Powerbook was internal ADB and ADB worked in OSX.

Tim Martin

*124e Lyham Road*
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*London SW2 5QA*

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e timjomar...@gmail.com
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On 6 February 2016 at 17:06, Wesley Furr  wrote:

> Were KVM (Keyboard/Video/Mouse) switches ever common for older Mac's with
> ADB and DB-15 video?  I've got a 4-port PS/2 VGA KVM switch on my PC at
> home, and I have an ADB/DB15 to PS2/VGA adapter that works with it...but I
> would like to have the ability to hook up or two Mac's as well...long
> story, but would be nice if I could switch the Mac's on the ADB/DB15 side.
> Just searched a bit on ebay and couldn't find anything, which was kinda
> surprising.  Does anyone have any insight?  maybe I just didn't come up
> with the right search phrase?  Or maybe they just weren't a common item?
>
> Thanks,
>
> Wesley
>
>
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Re: ADB KVM Switch?

[Clark Martin]

Not as common as PS/2 KVM switches but they did exist, I had one or two at one 
time.  I found them to be troublesome to use.  ADB doesn't deal well with being 
switched.  It's been a while so I don't recall the details but I think what 
happens is the mouse or keyboard goes unresponsive for a while.

Also if the Mac isn't connected to the monitor when it boots up there is no 
video output and it can't be started without restarting the computer with the 
monitor connected.

Clark Martin
KK6ISP
Yet another designated driver on the information super highway.

> On Feb 6, 2016, at 9:06 AM, Wesley Furr  wrote:
> 
> Were KVM (Keyboard/Video/Mouse) switches ever common for older Mac's with ADB 
> and DB-15 video?  I've got a 4-port PS/2 VGA KVM switch on my PC at home, and 
> I have an ADB/DB15 to PS2/VGA adapter that works with it...but I would like 
> to have the ability to hook up or two Mac's as well...long story, but would 
> be nice  if I could switch the Mac's on the ADB/DB15 side.  Just searched a 
> bit on ebay and couldn't find anything, which was kinda surprising.  Does 
> anyone have any insight?  maybe I just didn't come up with the right search  
> phrase?  Or maybe they just weren't a common item?
>  
> 

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SCSI Hard Drives

[Louis Ciotti]

I am looking for 2 SCSI hard drives.  One for my SE/30 where the drive died 
due to stiction (sp?), and another for my Centris 660AV.  Without out 
cracking the cases open what am I looking for when I am shopping around for 
these.  The Centris works, but it is just loud, and I would prefer a 
quieter drive if possible.

Also is there a way to get the Centris on a "modern" network, it will make 
transferring files easier.  Now I use a Mac Mini with a external USB drive 
as the middle man.

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Re: SCSI Hard Drives

[Dylan McDermond]

> On Feb 6, 2016, at 6:03 PM, Louis Ciotti  wrote:
> 
> I am looking for 2 SCSI hard drives.  One for my SE/30 where the drive

Honestly, I would suggest one of Mike McMaster's SCSI2SD. With the price and 
frailty of SCSI drives these days, it's a solid choice.

> Also is there a way to get the Centris on a "modern" network, it will make 
> transferring files easier. 

More than everything you ever wanted to know about connecting old macs can be 
found at http://www.applefool.com/se30

- Dylan

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Re: Mac Plus hangs for 30 seconds at boot before disk icon?

[Charles]

if you keep a good pram battery in there i think the next time the memory check 
goes super quick.
also check out BMOW rominator, that is one cool product he has.

Charles
maccaps.com



On Feb 6, 2016, at 2:25 AM, Dylan McDermond  wrote:

> 
>> On Feb 5, 2016, at 11:21 PM, 'Gregg Eshelman' via Vintage Macs 
>>  wrote:
>> 
>> you cannot disable the test on 68K Macs, so you just have to wait the extra 
>> time.
> 
> Unless you replace the ROM with a hacked ROM to disable the test.
> 
> - Dylan
> 
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