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X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Ron Natalie Cc: TUHS main list Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" --------=_MB880095B8-50B5-4A89-8452-910DE12C5C97 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable The Undergraduate Computer Society (UCS) made a deal with the EE=20 department that they could run UNIX on the departments 11/45 if they=20 could get the BASIC PLUS that was running on the existing RSTS system=20 running. Turns out that wasn't too difficult. UNIX uses trap as a=20 system call, RSTS (like most DEC OS's for some odd reason) uses EMT. =20 It only took a couple of calls that needed emulation in UNIX as well as=20 an option to disable UNIX's automatic statck management (the "nostatck"=20 system call). BASIC PLUS was at the core of the largest freshman EE class: Models=20 and Simulation. MNS students had a disk quota of a whopping 8 blocks=20 (4KB). It was encouraged that you buy a DECtape (something around=20 500Kb) for long term storage though the system had a papertape=20 reader/punch (how else to load the MAINDEC software). I thought I was=20 in fat city when me and my roommate chipped in and bought an RK05 pack=20 (4872 blocks). At the time the system ran on three "always mounted"=20 RK05's: The root, /sys1, and /sys2 (the latter being the user home=20 directories). The system swapped to an RF-11 fixed head disk (1 MB). =20 There were two extra RK05's shared between various users and were also= =20 dual ported to an 11/40 that ran MiniUNIX from time to time (until the=20 guys upstairs bought an 11/23 that I moved UNIX to as well). By the time I left, the system had picked up an 80MB removable drive, a=20 bulk core box (emulated another RF-11), and a tape drive. --------=_MB880095B8-50B5-4A89-8452-910DE12C5C97 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable The Undergraduate Computer Society (UCS) made a dea= l with the EE department that they could run UNIX on the departments 11/45= if they could get the BASIC PLUS that was running on the existing RSTS syst= em running.=C2=A0 =C2=A0 Turns out that wasn't too difficult.=C2=A0 =C2=A0= UNIX uses trap as a system call, RSTS (like most DEC OS's for some odd reas= on) uses EMT.=C2=A0 =C2=A0 It only took a couple of calls that needed emula= tion in UNIX as well as an option to disable UNIX's automatic statck manage= ment (the "nostatck" system call).

BASIC PLUS was at t= he core of the largest freshman EE class:=C2=A0 =C2=A0Models and Simulation= .=C2=A0 =C2=A0MNS students had a disk quota of a whopping 8 blocks (4KB).= =C2=A0 =C2=A0It was encouraged that you buy a DECtape (something around 500= Kb) for long term storage though the system had a papertape reader/punch (h= ow else to load the MAINDEC software).=C2=A0 =C2=A0I thought I was in fat c= ity when me and my roommate chipped in and bought an RK05 pack (4872 blocks= ).=C2=A0 =C2=A0At the time the system ran on three "always mounted" RK05's:= =C2=A0 The root, /sys1, and /sys2 (the latter being the user home directori= es).=C2=A0 =C2=A0 The system swapped to an RF-11 fixed head disk (1 MB).=C2= =A0 =C2=A0 There were two extra RK05's shared between various users and wer= e also dual ported to an 11/40 that ran MiniUNIX from time to time (until t= he guys upstairs bought an 11/23 that I moved UNIX to as well).
<= br />
By the time I left, the system had picked up an 80MB remova= ble drive, a bulk core box (emulated another RF-11), and a tape drive.

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