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Martin Bishop
@toomanysecrets@mastodon.social  ·  activity timestamp yesterday

VMS (Virtual Memory System) was a landmark operating system developed by Digital Equipment Corporation ( #DEC ) between 1975 and 1977, in conjunction with the design of the #VAX (Virtual Address eXtension) architecture. Conceived as a next-generation environment to succeed the #PDP11 line and its RSX operating systems, VMS was engineered to exploit the full capabilities of 32-bit virtual memory addressing.
(follow the thread) 👇🏻

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Karl Matthias 🇺🇦 and 9 others boosted
Altomare
@altomare@oldbytes.space  ·  activity timestamp 6 days ago

Some neat info about 70s hard drive contaminants.

From the DEC RK05 disk drive maintenance manual (DEC-00-HRK05-C-D)

#retrocomputing #dec

""Relationship of Disk Head, Disk, and Contaminants"

Graph showing a side/cutoff view of hard drive reading head over the platter, with size comparisons:
* Space between the head & platter: 100µ
* Smoke particle: 250µ
* Fingerprint smudge: no unit but it's drawn twice as big as the smoke particle
* Lint & dust: no unit either, 4 times bigger(ish) than the smudge
* Humar hair: .004"

The oxide layer on the disk is 200µ wid
""Relationship of Disk Head, Disk, and Contaminants" Graph showing a side/cutoff view of hard drive reading head over the platter, with size comparisons: * Space between the head & platter: 100µ * Smoke particle: 250µ * Fingerprint smudge: no unit but it's drawn twice as big as the smoke particle * Lint & dust: no unit either, 4 times bigger(ish) than the smudge * Humar hair: .004" The oxide layer on the disk is 200µ wid
""Relationship of Disk Head, Disk, and Contaminants" Graph showing a side/cutoff view of hard drive reading head over the platter, with size comparisons: * Space between the head & platter: 100µ * Smoke particle: 250µ * Fingerprint smudge: no unit but it's drawn twice as big as the smoke particle * Lint & dust: no unit either, 4 times bigger(ish) than the smudge * Humar hair: .004" The oxide layer on the disk is 200µ wid
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Altomare
@altomare@oldbytes.space  ·  activity timestamp 6 days ago

Some neat info about 70s hard drive contaminants.

From the DEC RK05 disk drive maintenance manual (DEC-00-HRK05-C-D)

#retrocomputing #dec

""Relationship of Disk Head, Disk, and Contaminants"

Graph showing a side/cutoff view of hard drive reading head over the platter, with size comparisons:
* Space between the head & platter: 100µ
* Smoke particle: 250µ
* Fingerprint smudge: no unit but it's drawn twice as big as the smoke particle
* Lint & dust: no unit either, 4 times bigger(ish) than the smudge
* Humar hair: .004"

The oxide layer on the disk is 200µ wid
""Relationship of Disk Head, Disk, and Contaminants" Graph showing a side/cutoff view of hard drive reading head over the platter, with size comparisons: * Space between the head & platter: 100µ * Smoke particle: 250µ * Fingerprint smudge: no unit but it's drawn twice as big as the smoke particle * Lint & dust: no unit either, 4 times bigger(ish) than the smudge * Humar hair: .004" The oxide layer on the disk is 200µ wid
""Relationship of Disk Head, Disk, and Contaminants" Graph showing a side/cutoff view of hard drive reading head over the platter, with size comparisons: * Space between the head & platter: 100µ * Smoke particle: 250µ * Fingerprint smudge: no unit but it's drawn twice as big as the smoke particle * Lint & dust: no unit either, 4 times bigger(ish) than the smudge * Humar hair: .004" The oxide layer on the disk is 200µ wid
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Paolo Amoroso
@amoroso@oldbytes.space  ·  activity timestamp 3 weeks ago

And now for something completely meta: Interlisp-10 inside Medley Interlisp.

The terminal emulator of the window at center is connected to SDF's PDP-10 system running Interlisp-10 under TOPS-20 (TWENEX). The shell with the terminal emulator and Medley Interlisp are running on Linux.

#interlisp #twenex #dec #retrocomputing

Screenshot of the black and white desktop of a 1980s graphical workstation environment. The desktop has a gray background pattern and several windows with a white background and a title bar with white text on a black background. The main window is a terminal emulator with a remote session connected to a PDP-10 system running the Interlisp-10 Lisp environment.
Screenshot of the black and white desktop of a 1980s graphical workstation environment. The desktop has a gray background pattern and several windows with a white background and a title bar with white text on a black background. The main window is a terminal emulator with a remote session connected to a PDP-10 system running the Interlisp-10 Lisp environment.
Screenshot of the black and white desktop of a 1980s graphical workstation environment. The desktop has a gray background pattern and several windows with a white background and a title bar with white text on a black background. The main window is a terminal emulator with a remote session connected to a PDP-10 system running the Interlisp-10 Lisp environment.
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Paolo Amoroso
@amoroso@oldbytes.space  ·  activity timestamp 4 weeks ago

Since I'm playing with Interlisp-10 on TWENEX I put together a reading list of documentation to get familiar with DEC's operating system.

https://archive.org/details/tops-20-users-guide

https://archive.org/details/tops-20-commands

https://archive.org/details/tops-20-user-utilities

#retrocomputing #dec #interlisp

Internet Archive

TOPS-20 User Utilities Guide : Digital Equipment Corporation : Free Download, Borrow, and Streaming : Internet Archive

DEC manual
Internet Archive

TOPS-20 Commands Reference Manual : Digital Equipment Corporation : Free Download, Borrow, and Streaming : Internet Archive

DEC manual
Internet Archive

TOPS-20 User's Guide : Digital Equipment Corporation : Free Download, Borrow, and Streaming : Internet Archive

DEC manual
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Stefano Marinelli boosted
Eugene :freebsd: :emacslogo:
@evgandr@mastodon.bsd.cafe  ·  activity timestamp 2 months ago

On this weekend the BIG hacker's festival, named "ChaosConstructions" is starting!

https://chaosconstructions.ru/

There are should be a lot of retro tech: #SunMicrosystem servers, some old #DEC stuff, #SunOS (or #Solaris ) terminals, PCs from Win95/98 era, etc. All hardware is working drgn_happy

I was on the festival in the last year. Some photos from this festival are here: https://eugene-andrienko.com/photo/2024/09/01/summer-photos-2024.html (section "Computers").

So, on the next week(s) you (my subscribers) will be flooded by the photos of the various retro tech, sorry (but no sorry) drgn_happy_blep

#HackThePlanet#RetroComputing

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Eugene :freebsd: :emacslogo:
@evgandr@mastodon.bsd.cafe  ·  activity timestamp 2 months ago

On this weekend the BIG hacker's festival, named "ChaosConstructions" is starting!

https://chaosconstructions.ru/

There are should be a lot of retro tech: #SunMicrosystem servers, some old #DEC stuff, #SunOS (or #Solaris ) terminals, PCs from Win95/98 era, etc. All hardware is working drgn_happy

I was on the festival in the last year. Some photos from this festival are here: https://eugene-andrienko.com/photo/2024/09/01/summer-photos-2024.html (section "Computers").

So, on the next week(s) you (my subscribers) will be flooded by the photos of the various retro tech, sorry (but no sorry) drgn_happy_blep

#HackThePlanet#RetroComputing

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Paolo Amoroso
@amoroso@oldbytes.space  ·  activity timestamp 3 months ago

Heads up to DEC enthusiasts: @bitsavers uploaded dozens of scans of issues of The Mini Tasker DECUS RT-11 SIG newsletter.

https://bitsavers.org/pdf/dec/decus/DECUS_SIG_Newsletters/mini-tasker

#retrocomputing #dec

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