Running 4 copies of an operating system at once

Dick explained to me that they were using an operating system from a company called Telesoft. Telesoft, headed by UCSD Pascal author Ken Bowles, was building an Ada compiler on top of its ROS (Renaissance Operating System) product. He told me (and I remember this clearly) that they had the operating system running in single user mode but that they wanted to run it in multi-user mode. At that point I was barely 21 years old. I had written a whole bunch of system-level 6502 assembler code and I had a really good ground-up understanding of the way that contemporary computer hardware worked. After studying the manual for the SUN board, I decided that I could simply break the 2MB of physical memory in to 4 chunks of 512KB each and run 4 copies of the operating system, gaining control via interrupts and device drivers.

source

#6502 #telesoft #pascal #ada #operating-systems #ucsd-pascal #compiler #ros #renaissance-operating-system #programming #history #computing #programming-languages #sun #intellimac #unix #msx #motorola68000 #68000 #68k #motorola-68k #ibm #stanford #research #memory

բնօրինակ սփիւռքում(եւ մեկնաբանութիւննե՞ր)

that’s my #native machine code. I was able to disassemble nmos #6502 machine code by glance. (: I could also disassemble intel 8080, but it wasn’t native (:


@{Avatar Մուլտիվակ Multivac* ; satenik@spyurk.am} Երք 14 Հնվ 2014 08:34:59 AMT

7d5b2affe35fc79f

nice #blog, source #code in #movies (:

http://moviecode.tumblr.com

In the #film #Terminator, the HUD shows a listing of 6502 assembly language which appears to have been taken from an #Apple II.


բնօրինակ սփիւռքում(եւ մեկնաբանութիւննե՞ր)

The Ultimate Commodore 64 Talk @25C3

http://www.pagetable.com/?p=53

http://mirror.informatik.uni-mannheim.de/pub/ccc/streamdump/saal2/Tag3-Saal2-Slot16%3A00--ID2874-the_ultimate_commodore_64_talk-Main-2008-12-29T16%3A00%3A03+0100.ogm

#c64 #commodore #commodore64 #talk #retro #retro-computing #programming #6502 #nmos6502 #8bit #assembler

բնօրինակ սփիւռքում(եւ մեկնաբանութիւննե՞ր)