[TUHS] AT&T 3B2/400 Emulator

[TUHS] AT&T 3B2/400 Emulator

[Seth Morabito]

Hello everyone,

A few weeks ago, I merged my work-in-progress AT&T 3B2/400 emulator
into the main SIMH source tree, and I realized that I should mention
it here, where there may be particular interest.

The 3B2 and 3B5 were main porting platforms for AT&T System V Release
3, and when I realized how scarce the equipment has become to find, I
set out to write an emulator for the 3B2. It was rough going at points
due to lack of documentation, but I was able to reverse engineer quite
a bit of the system through reading the SVR3 source code, and of
course strapping my own 3B2/310 to a logic analyzer.

The emulator is fairly complete. It certainly works well as a
standalone, single-user UNIX system. Support for multiple terminals is
coming very soon (as soon as I find the time, that is) so it will soon
be possible to allow multiple users to telnet into virtual terminals,
similar to how the SIMH PDP-11 and VAX emulators work.

For now, information about the emulator lives here:

https://loomcom.com/3b2/emulator/


Best Wishes,

-Seth
-- 
Seth Morabito
web at loomcom.com

[TUHS] AT&T 3B2/400 Emulator

[Arthur Krewat]

On 12/6/2017 2:00 PM, Seth Morabito wrote:
> A few weeks ago, I merged my work-in-progress AT&T 3B2/400 emulator
> into the main SIMH source tree, and I realized that I should mention
> it here, where there may be particular interest.
>
> The 3B2 and 3B5 were main porting platforms for AT&T System V Release
> 3, and when I realized how scarce the equipment has become to find, I
> set out to write an emulator for the 3B2. It was rough going at points
> due to lack of documentation, but I was able to reverse engineer quite
> a bit of the system through reading the SVR3 source code, and of
> course strapping my own 3B2/310 to a logic analyzer.
>
> The emulator is fairly complete. It certainly works well as a
> standalone, single-user UNIX system. Support for multiple terminals is
> coming very soon (as soon as I find the time, that is) so it will soon
> be possible to allow multiple users to telnet into virtual terminals,
> similar to how the SIMH PDP-11 and VAX emulators work.
>
Nice work! The KS10 emulation also has telnet-to-DZ11 support as well 
(cough cough).

(Ok, Bob did rewrite the DZ11 emulation after I stuffed someone else's 
version into the KS10, but still...) ;)

[TUHS] AT&T 3B2/400 Emulator

[Jason Stevens]

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Wow so glad you got it to boot!  

It’s great that this reference platform is now ‘alive’ through emulation.  To say these machines are super hard to find these days is difficult is an understatement.  Even in the mid ‘90s finding anything for these beasts was a monster chore.

Outside of college and using them for style and diction, I’ve only seen one paired with an AT&T Definity phone switch, but everything was quickly moving to NCR/SUN.

Great job!!

Sent from Mail for Windows 10

From: Seth Morabito
Sent: Thursday, 7 December 2017 3:10 AM
To: tuhs at tuhs.org
Subject: [TUHS] AT&T 3B2/400 Emulator


Hello everyone,

A few weeks ago, I merged my work-in-progress AT&T 3B2/400 emulator
into the main SIMH source tree, and I realized that I should mention
it here, where there may be particular interest.

The 3B2 and 3B5 were main porting platforms for AT&T System V Release
3, and when I realized how scarce the equipment has become to find, I
set out to write an emulator for the 3B2. It was rough going at points
due to lack of documentation, but I was able to reverse engineer quite
a bit of the system through reading the SVR3 source code, and of
course strapping my own 3B2/310 to a logic analyzer.

The emulator is fairly complete. It certainly works well as a
standalone, single-user UNIX system. Support for multiple terminals is
coming very soon (as soon as I find the time, that is) so it will soon
be possible to allow multiple users to telnet into virtual terminals,
similar to how the SIMH PDP-11 and VAX emulators work.

For now, information about the emulator lives here:

https://loomcom.com/3b2/emulator/


Best Wishes,

-Seth
-- 
Seth Morabito
web at loomcom.com

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[TUHS] AT&T 3B2/400 Emulator

[Cory Smelosky]

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Heh incidentally I am awaiting the arrival of a 3B2/400 and already have a Definity...;)

Sent from my iPhone

> On Dec 7, 2017, at 18:36, Jason Stevens <jsteve at superglobalmegacorp.com> wrote:
> 
> Wow so glad you got it to boot! 
>  
> It’s great that this reference platform is now ‘alive’ through emulation.  To say these machines are super hard to find these days is difficult is an understatement.  Even in the mid ‘90s finding anything for these beasts was a monster chore.
>  
> Outside of college and using them for style and diction, I’ve only seen one paired with an AT&T Definity phone switch, but everything was quickly moving to NCR/SUN.
>  
> Great job!!
>  
> Sent from Mail for Windows 10
>  
> From: Seth Morabito
> Sent: Thursday, 7 December 2017 3:10 AM
> To: tuhs at tuhs.org
> Subject: [TUHS] AT&T 3B2/400 Emulator
>  
>  
> Hello everyone,
>  
> A few weeks ago, I merged my work-in-progress AT&T 3B2/400 emulator
> into the main SIMH source tree, and I realized that I should mention
> it here, where there may be particular interest.
>  
> The 3B2 and 3B5 were main porting platforms for AT&T System V Release
> 3, and when I realized how scarce the equipment has become to find, I
> set out to write an emulator for the 3B2. It was rough going at points
> due to lack of documentation, but I was able to reverse engineer quite
> a bit of the system through reading the SVR3 source code, and of
> course strapping my own 3B2/310 to a logic analyzer.
>  
> The emulator is fairly complete. It certainly works well as a
> standalone, single-user UNIX system. Support for multiple terminals is
> coming very soon (as soon as I find the time, that is) so it will soon
> be possible to allow multiple users to telnet into virtual terminals,
> similar to how the SIMH PDP-11 and VAX emulators work.
>  
> For now, information about the emulator lives here:
>  
> https://loomcom.com/3b2/emulator/
>  
>  
> Best Wishes,
>  
> -Seth
> --
> Seth Morabito
> web at loomcom.com
>  
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[TUHS] AT&T 3B2/400 Emulator

[Ed Carp]

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Speaking of which, does anyone have any plans on writing an emulator
for the 3B1 (aka PC7300)?

On 12/7/17, Cory Smelosky <b4 at gewt.net> wrote:
> Heh incidentally I am awaiting the arrival of a 3B2/400 and already have a
> Definity...;)
>
> Sent from my iPhone
>
>> On Dec 7, 2017, at 18:36, Jason Stevens <jsteve at superglobalmegacorp.com>
>> wrote:
>>
>> Wow so glad you got it to boot!
>>
>> It’s great that this reference platform is now ‘alive’ through emulation.
>> To say these machines are super hard to find these days is difficult is an
>> understatement.  Even in the mid ‘90s finding anything for these beasts
>> was a monster chore.
>>
>> Outside of college and using them for style and diction, I’ve only seen
>> one paired with an AT&T Definity phone switch, but everything was quickly
>> moving to NCR/SUN.
>>
>> Great job!!
>>
>> Sent from Mail for Windows 10
>>
>> From: Seth Morabito
>> Sent: Thursday, 7 December 2017 3:10 AM
>> To: tuhs at tuhs.org
>> Subject: [TUHS] AT&T 3B2/400 Emulator
>>
>>
>> Hello everyone,
>>
>> A few weeks ago, I merged my work-in-progress AT&T 3B2/400 emulator
>> into the main SIMH source tree, and I realized that I should mention
>> it here, where there may be particular interest.
>>
>> The 3B2 and 3B5 were main porting platforms for AT&T System V Release
>> 3, and when I realized how scarce the equipment has become to find, I
>> set out to write an emulator for the 3B2. It was rough going at points
>> due to lack of documentation, but I was able to reverse engineer quite
>> a bit of the system through reading the SVR3 source code, and of
>> course strapping my own 3B2/310 to a logic analyzer.
>>
>> The emulator is fairly complete. It certainly works well as a
>> standalone, single-user UNIX system. Support for multiple terminals is
>> coming very soon (as soon as I find the time, that is) so it will soon
>> be possible to allow multiple users to telnet into virtual terminals,
>> similar to how the SIMH PDP-11 and VAX emulators work.
>>
>> For now, information about the emulator lives here:
>>
>> https://loomcom.com/3b2/emulator/
>>
>>
>> Best Wishes,
>>
>> -Seth
>> --
>> Seth Morabito
>> web at loomcom.com
>>
>

[TUHS] AT&T 3B2/400 Emulator

[emanuel stiebler]

On 2017-12-08 09:48, Ed Carp wrote:
> Speaking of which, does anyone have any plans on writing an emulator
> for the 3B1 (aka PC7300)?

http://philpem.me.uk/code/3b1emu/

[TUHS] AT&T 3B2/400 Emulator

[Jason Stevens]

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There is this:
http://www.philpem.me.uk/code/3b1emu/

It does boot UNIX, although there is further issues which prevent things like cc from running.  But if you want to poke around as a user, it’s enough to do that.

Sent from Mail for Windows 10

From: Ed Carp
Sent: Friday, 8 December 2017 4:49 PM
To: Cory Smelosky
Cc: tuhs at tuhs.org
Subject: Re: [TUHS] AT&T 3B2/400 Emulator

Speaking of which, does anyone have any plans on writing an emulator
for the 3B1 (aka PC7300)?

On 12/7/17, Cory Smelosky <b4 at gewt.net> wrote:
> Heh incidentally I am awaiting the arrival of a 3B2/400 and already have a
> Definity...;)
>
> Sent from my iPhone
>
>> On Dec 7, 2017, at 18:36, Jason Stevens <jsteve at superglobalmegacorp.com>
>> wrote:
>>
>> Wow so glad you got it to boot!
>>
>> It’s great that this reference platform is now ‘alive’ through emulation.
>> To say these machines are super hard to find these days is difficult is an
>> understatement.  Even in the mid ‘90s finding anything for these beasts
>> was a monster chore.
>>
>> Outside of college and using them for style and diction, I’ve only seen
>> one paired with an AT&T Definity phone switch, but everything was quickly
>> moving to NCR/SUN.
>>
>> Great job!!
>>
>> Sent from Mail for Windows 10
>>
>> From: Seth Morabito
>> Sent: Thursday, 7 December 2017 3:10 AM
>> To: tuhs at tuhs.org
>> Subject: [TUHS] AT&T 3B2/400 Emulator
>>
>>
>> Hello everyone,
>>
>> A few weeks ago, I merged my work-in-progress AT&T 3B2/400 emulator
>> into the main SIMH source tree, and I realized that I should mention
>> it here, where there may be particular interest.
>>
>> The 3B2 and 3B5 were main porting platforms for AT&T System V Release
>> 3, and when I realized how scarce the equipment has become to find, I
>> set out to write an emulator for the 3B2. It was rough going at points
>> due to lack of documentation, but I was able to reverse engineer quite
>> a bit of the system through reading the SVR3 source code, and of
>> course strapping my own 3B2/310 to a logic analyzer.
>>
>> The emulator is fairly complete. It certainly works well as a
>> standalone, single-user UNIX system. Support for multiple terminals is
>> coming very soon (as soon as I find the time, that is) so it will soon
>> be possible to allow multiple users to telnet into virtual terminals,
>> similar to how the SIMH PDP-11 and VAX emulators work.
>>
>> For now, information about the emulator lives here:
>>
>> https://loomcom.com/3b2/emulator/
>>
>>
>> Best Wishes,
>>
>> -Seth
>> --
>> Seth Morabito
>> web at loomcom.com
>>
>

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