This one showed up on eBay of all places. The original MSRP was $49.95 USD.
Well it seems that back in the early 90’s Microsoft was transitioning their Basic offering from the QuickBASIC to Qbasic. And one of the launch products was the Microsoft Game Shop, back from 1990. This was a specialized version apparently without any compiler, but included a tutorial based around games to teach basic.
Which back in the day it looks like it would have been a good way to inspire kids, although I have never heard of it. There is even a glowing review in Compute, issue 130.
Nothing like a little vintage advertising to try to re-capture the feel. But don’t let the colorful lizard fool you, this certainly was a dark time for Citrix. Firs they had tooled a product around the future of the PC market, OS/2 to only have Microsoft pull out of active development just as they were launching Multiuser 1.0. And to be fair it wasn’t just Citrix, the whole industry including Microsoft was in turmoil as people were pulling away from IBM and selecting Windows on MS-DOS of all things!
Citrix, like a lot of vars were caught in this lurch between OS/2 and the forthcoming NT OS/2 3.0, which of course ended up becoming Windows NT. During this time even Microsoft had to keep selling it’s SQL server on OS/2, along with it’s LanManager file & print server. Although they had a solution for the end user in the form of Windows they didn’t have any server platform. That left Citrix chasing the tail end of the application wave again as although they could now finally use OS/2 2.0, with it’s 32bit/16bit hybrid kernel, there remote user solution was still terminal based.
As IBM & Microsoft had split up the direction of the OS/2 project, IBM was running with version 2 as a platform for running DOS & Windows applications. Which ultimately lead to the major problem that OS/2 ran Windows apps better than native Windows thanks to it’s ability to run isolated Windows VM’s using paravirutalized graphic drivers. It wasn’t until Windows NT 3.5 could Microsoft meet this feat with it’s new platform. Suddenly Citrix had access to tonnes of MS-DOS based applications, much to my surprise there is even a DPMI driver on the disks I have, meaning that Windows 3.0 standard mode can run, along with DooM! But for Citrix this would be another one of those ‘not good enough’ moments where PC Servers were just high end workstations that could easily be maxed by one user, commodity multiprocessor machines were years off, and of course everyone was jumping to Windows 3.0.
But this did at least you run MS-DOS applications remotely, over dialup.
Installing Citrix Multiuser 2.00 starts looking very much like one of the 1.x versions of OS/2 with a far more busier screen featuring the Citrix tree. However from this point onward it feels a LOT more like IBM OS/2 2.00. Citrix interestingly enough has two disk 1’s, one that features newer LADDR drivers, and another with the older 1.x drivers. Although under bochs, the older driver disk crashes out. The entire OS fits on 8 high density 5 1/4″ diskettes. As teased before this post, I saw this on eBay, ordered it immediately to only discover that I don’t have the needed drive, and had to order one from pc-rath_de, and I wanted to give a shout out, as he made sure that I had the proper floppy ribbon cable, so I could go ahead with this fun project.
Although I had been expecting this to be inline with the never released Microsoft OS/2 2.00, it clearly has a lot of IBM vestige, even though the OS/2 source code license agreement was between Citrix and Microsoft.
Indeed, even checking the OS level:
IBM OS/2 Base Operating System
Standard Edition 2.00 Component ID 560109001
Current CSD level: XR00000
Prior CSD level: XR00000
Compare this to the OS/2 2.00 GA:
IBM OS/2 Base Operating System
Version 2.00 Component ID 562107701
Current CSD level: XR02000
Prior CSD level: XR00000
IBM OS/2 Base Operating System
Standard Edition 2.00 Component ID 560109001
Current CSD level: XR00000
Prior CSD level: XR00000
Well isn’t that interesting?
Having had the misfortune of crashing all three we can look at the internal revisions:
So this make the BOS (Base Operating System in IBM speak) newer than the OS/2 LA (Limited Availability) kernel, however quite a few revisions behind the GA (General Availability). This of course means that Citrix Multiuser 2.0 is basically incompatible with any 32bit OS/2 software. I was unable to run anything EMX based, nor could I run the vast majority of the 32bit TCP/IP stack for OS/2 2.00. The best I could do was have it load the drivers, to where I could setup and ping the loopback, but the route command crashes the system, and any of the commands simply refuse to run. Not being able to run 32bit OS/2 applications greatly reduces the usability of the system, and falls further to the OS/2 trap that it really just excels at running MS-DOS apps.
It was a bit of a surprise to find out that even though Citrix had their source license through Microsoft, the 2.0 components turned out to be the upstream components from IBM. Just as the included Qbasic is the IBM version, along with the other components. The terminal support is naturally more robust than version 1, although I think the larger problem I had trying to run OS/2 programs it that many terminals are hard coded for 24 lines, and I don’t think you can change that in Citrix. And it does mention that if you do try to run on a 24 line terminal that DOS won’t run.
Much like 1.0, all the administration is done via text tools. It feels weird at first as even on the console there doesn’t seem to be any mouse integration, although the installer does ask if you do have a mouse on the system.
And like 1.0 there is no Presentation Manager, so no graphics on the console. HOWEVER you can run MS-DOS graphical stuff on the console. Although today I have no real need for it, but I went ahead and setup the included Windows support.
What is interesting is that you are expected to supply your own retail version of Windows 3.00, and Citrix has some updated drivers, along with OS2K286.EXE, and updated program manager, control panel, and print manager. While IBM included a full copy of Windows 3.00 at this point, this feels like the beginning of OS/2 for Windows – AKA the Borg.
First I just setup a COM port on Bochs to Listen on port 8880. Unfortunately this isn’t resilient, as Bochs will wait for a connect before actually starting, and if you drop off, it won’t let you connect back in.
And then it’s a matter of running CFGTERM, and adding in the Async module.
With the module added you then just have to assign a port.
I didnt’ do anything special other than telling Citrix that there is no modem, it’s a direct connect, and to use the ICA terminal profile.
Using the Citrix MultiLink program, and DOSBox I was able to add an ICA terminal. On DOSBox I had to specify a modem with an IRQ in the config like this:
serial2=modem irq3 listenport:5001
In the modem settings I had to set this to Forced connect, otherwise it’ll never see the server.
And here is how I ‘called’ the Bochs VM. And then after ‘dialing’ in Bochs will start up the Citrix VM, and then you’ll get the simple Login prompt. Login and you’ll get pselect.
Pselect the the text based UI tool to get around your OS/2 sessions. It’s a little cumbersome at first, but once you get used to it, it’s just like OS/2 1.0 … Or Multiuser 1.0 for that matter, nothing really changed, except you can start MS-DOS Sessions now.
And yes, you can run Qbasic. But you can’t do anything graphical. Not even DooM. Although after loading the VDPMI device driver, DooM v1.1 will run, but then it’ll give you this fun error:
And that is where I’m going to have to leave this adventure for now.
AT&T 3B2 SYSTEM CONFIGURATION:
Memory size: 4 Megabytes
Device Name Subdevices Extended Subdevices
72 Megabyte Disk
This machine has to be set up by you. When you see the "login" message type
followed by the RETURN key. This will start a procedure that leads you through
those things that should be done the "first time" the machine is used.
The system is ready.
Back in the 1980’s AT&T shifted UNIX from being an internal research project that got somewhat popular in college spaces (and larger companies, General Motors was an early UNIX adapter, along with companies like Industrial Light and Magic). Quickly after the divestiture of 1984, AT&T entered the commercial space with it’s own custom machines & their home made UNIX operating system. Below is one of the ads they ran in 1984, touting their so called ‘super microcomputers’, featuring the 3B2, the 3B5, and the AT&T Personal Computer.
And indeed for many a government institute bewildered by the dozens of UNIX vendors, standards, and chaos of different platforms and processors many were all to happy to buy AT&T UNIX on AT&T machines.
And indeed this was my first experience with genuine SYSV Unix.
And I hated it.
Initially I had been thrown at an English computer lab because I knew how logon and do my work in style & diction, they decided I could help. The system was aging and had major problems, as some prior students had figured out enough of the link kit that they would put their own attempts at re-writing portions of the kernel into the system, and it’d break. Naturally the original installation diskettes were lost, and the best that could be done was basically shut it down throughout the day and run the disk repair utilities. It was not a fun job.
Later on the 3B2’s were thrown into the ‘common garbage’ aka free kit for other departments, and the 3B2’s re-appeared at the next place I was volunteering at on campus. However in addition to the two machines, there was a few other boxes of manuals, and oddly enough the installation diskettes. And also about a dozen of these AT&T ISA Starlan adapters. These weren’t the ones that were basically Ethernet (Starlan10) but rather the original ones.
Through some incredible luck we did find an NDIS 3 MS-DOS driver for the Starlan car, and we were able to cobble together a Starlan1 LAN consisting of a 3B2 that we cannibalized the RAM and disks from one of them to make a ‘super’ 3B2, with added TCP/IP software and a massively cut down port I did of samba to turn it into a tiny file & print server (72MB MFM disks were it’s biggest if I recall), along with Windows 95 clients. And of course with a TCP/IP lan we could easily load a proxy server (WinGate?) on one machine with the 56kb modem, and now we all had internet access. I know it’s sad today, but trust me back then it was “a big deal” that we had a fully functional LAN.
Instructions and disk images on the site made it incredibly easy to grab the latest SIMH Windows Development binaries, and get my own virtual 3B2 up and running in minutes! So naturally I pasted in dhrystone.c to see if it’d work. And that was the first weird issue is that the backspace is the pound # key. So all the C macro definitions lost their # sign. I added them in vi without full terminal support because I’m crazy and:
# uname -a
unix unix 3.2 2 3B2
Dhrystone(1.0) time for 500000 passes = 40
This machine benchmarks at 12500 dhrystones/second
Obviously this is 100% bogus, as the real machine should get around 735, and I didn’t even bother with the -O flag.
The current emulator doesn’t do any additional serial ports, nor any Ethernet adapters. So you only get a console. But with the pre-installed C compiler image, I was able to build a trivial file just fine. Although pasting on the console really leaves a lot to be desired.
I know for some of us old people the 3B2 hid in the corners of our call centres, running our AT&T Definity switches, our voicemail, and even some of our early ISPs. After funneling money into SUN to get them to work on SYSVr4 which was the grand unification of BSD + SYSV AT&T’s interest if UNIX quickly waned, and they divested themselves of UNIX, and eventually all PC hardware, although they did re-enter the PC space a few times before exiting yet again.
As time would tell, proprietary hardware + a previously ‘open’ operating system were not the winning combination. And so far the only UNIX vendor to weather the Linux storm so far is IBM with it’s A/IX.
There’s a reason I didn’t have anything to link for (a). That’s because to the best of my knowledge and research, no version has survived these past decades.
As for (b), it seems only the linked version 3.99 from the year 2003 was saved.
The CVS repository and thus commit history has been lost.
If anyone has either actual code for the old Perl Q or the CVS repo for the old
Q written in C, please reach out to me via `xorhash ++at++ protonmail.com’.
I’m most interested in looking through it.
However, not all hope was lost with the old Perl Q. As it turns out, most likely, the old Perl Q was actually based on an off-the-shelf product called “CServe”. What makes me think so?
Let’s take a look at [the QuakeNet Q command listing from 1998.
I picked the command “WHOIS” and googled its use “Will calculate a nick!user@host mask for you from the whois information of this nick.” This lead me to a help file for StarLink IRC. At the top, it reads:
CStar3.x User Command Help File **** 09/10/99
Information extracted from CServe Channel Service
Version 2.0 and up Copyright (c)1997 by Michael Dabrowski
Help Text (c)1997 (c)1997 StarLink-IRC (with permission)
Wait a second, “CServe Channel Service”? I know that from somewhere.
So the commands between that help file and the QuakeNet Q command listing match up and so does Q’s host today. Most likely, I’m on the right track with this. What’s left is to track down a copy of CServe.
Note: I’ve been on the old Perl Q for a while and this strategy didn’t use to work. It seems Google newly indexed these pages. For once I can sincerely say: Thank you, Google.
The only surviving versions are 3.0 and 5.1. CServe got renamed to “CS” starting with 5.0 and was rewritten in C by someone other than the original CServe author, going by the comments in the file header of CS5.1 `src/show_access.c’. CS was actually sold as a commercial product. I wonder how many people bought it.
QuakeNet most likely took a version between 2.0 and 4.0, inclusive, as the basis for the old Perl Q. Which one in particular it was, we may never know. If you have any details, please reach out to me at the e-mail address above.
I can’t make any clever guesses anyway since the only versions that the web archive has are 3.0 and 5.1. The latter is written in C, so it quite obviously can’t be the old Perl Q.
Making It Run
So now that I have CServe 3.0, I wanted to actually see it running.
There are three ways to reasonably accomplish this:
a. port CServe to a modern IRCd’s server-to-server protocol,
b. port an old IRCd to a modern platform,
c. emulate an old platform and run both IRCd and CServe there.
I chose option (b).
Once upon a time, I did option (a) for the old UnderNet X bot. It was a very painful exercise to port a bot that predates the concept of UIDs (or numeric nicks/numnicks as ircu’s P10 server-to-server protocol calls them). There’s nothing too exciting about doing (c) by just emulating a 486 or so and FreeBSD, just sounds like a boring roundtrip of emulation and network bridging.
Fortunately, the author was a nice person and wrote on the CServe website that version 3.0 requires “ircu2.9.32 and above”.
It seems the ircu2.10 series followed right after ircu2.9.32. While I’m sure there’s some linking backwards compatibility, determining which ircu in the ircu2.10 series still spoke enough P09 to link with CServe sounded like an exercise in boring excruciating pain. Modern-day ircu most certainly no longer speaks P09. Besides, what’s the fun in just doing the manual equivalent of `git bisect’?
So after grabbing ircu2.9.32, I tried to just straightforward compile and run it.
There’s a `Config’ script that’s supposed to be kind of like autoconf `configure’, but I’ve found it extremely non-deterministic. It generates `include/setup.h’. I’ve made a diff for your convenience. It targets Debian stable, and should work with any reasonably modern Linux. There are special `#ifdef’ branches for FreeBSD/NetBSD in the code. This patchset may break for BSDs in general.
Do not touch `Config’, meddle with `include/setup.h’ manually. Remember this is an ancient IRCd, there are actual tunables in `include/config.h’.
The included example configuration file is correct for the most part, but the documentation on U:lines is wrong. U:lines do what modern-day U:lines do, i.e., designate services servers with uber privileges.
Excuse Me, But What The Fuck?
Of course, I’m dealing with old code. It wouldn’t be old code if I didn’t have some things that just make me go “Excuse me, but what the fuck?”
Looping at the speed of light
for (acptr = client, (void)collapse(mask); acptr; acptr = acptr->next)
if (!IsServer(acptr) && !IsMe(acptr))
if (!match(mask, acptr->name))
See that `continue’ way on the left? What is it doing there? Telling the compiler to loop faster?
Carol of the Old Varargs
So apparently some of this code predates C89. Which means it uses old-style declarations, but that’s okay. It also uses old-style varargs, which is adorable.
The hacks around not even that being there are adorable, too:
These functions were declared like this (the example chosen above actually has
no declaration because why not):
extern void sendto_ops();
There are `mycmp’ and `myncmp’ for doing RFC1459 casemapping string comparisons. `strcasecmp’ got `#define’d to `mycmp’, but in one case `mycmp’ got `#define’d back to `strcasecmp’. It seemed easier to just remove `mycmp’, replacing it with `strcasecmp’ and forgo RFC1459 casemapping. This is doubly useful because CServe doesn’t actually honor RFC1459 casemapping.
Waiting for the Cookie
ircu uses PING cookies. I was rather confused when I didn’t get one immediately after sending `NICK’ and `USER’. In fact, it took so long that I thought the IRCd got stuck in a deadloop somewhere. That would’ve been a disaster since the last thing I wanted to do is get up close and personal with the networking stack.
As it turns out, it can’t send the cookie:
* Nasty. Cant allow any other reads from client fd while we're
* waiting on the authfd to return a full valid string. Use the
* client's input buffer to buffer the authd reply.
* Oh. this is needed because an authd reply may come back in more
* than 1 read! -avalon
I lowered `CONNECTTIMEOUT’ to 10 in the diff linked above. This makes the wait noticeably shorter when you aren’t running an identd.
CServe Isn’t Much Better
Not that CServe is much better. I have to hand it to Perl, I only needed to undo the triple-`undef’ on line 450 of `cserve.pl’ and it worked with no modifications. God bless the backwards compatibility of Perl 5.
That said, it has its own interesting ideas of code. This is the main command execution:
Yep, it opens, reads into an array, closes and then evals. For every command it recognizes. Of course, this means code hot swapping, but it also means terrible performance with any non-trivial amount of users.
Oh, and all passwords are hashed. But they’re hashed with `crypt()’. And a never-changing salt of ZZ.
Was it worth it?
No, not really.
Would I do it again? Absolutely.
You probably do not want to expose this to the outside world.
The IRCd code is scary in all the wrong ways.
Some other things if you’re into ancient IRC stuff:
Back in the late 80’s when OS/2 was starting to get some traction Ed Iacobucci took a team and split off from the mainline Microsoft / IBM alliance, and with Microsoft’s blessing (and source code) took OS/2 and took up the challenge that both IBM & Microsoft dropped that was the ultimate challenge to UNIX, the ability to host multiple users on the same machine. Citrix had it’s start some time in 1989 (Don’t forget that NT OS/2 had it’s start in 1988), and back then LANs were still seen as super expensive, just as TCP/IP was a university / military protocol that even enterprise to small businesses were hooked on either NetBEUI or IPX/SPX, if they had any LAN at all.
Sneakernet was king in this era, just as the BBS was our connected world.
As this ancient promotional video shows, the product they were chasing was low end Unix market, oddly enough their larger competition being SCO Xenix, which itself was separated out from Microsoft.
While I’m waiting for a 5 1/4″ disk, I thought I’d take a crack at installing Citrix Multiuser version 1.0 that had surfaced a while back.
I’m using this as a template for a config. Naturally to boot floppy image it’ll need a change.
Citrix has many 386 hooks in place. After applying the CSD MU01091 I saw this in the readme:
MULTIUSER is designed to take advantage of the 386/486 instruction set where possible. Because of this Citrix MULTIUSER runs only on 386 compatible processors. You can take advantage of this fact to boost performance of your application while running on MULTIUSER.
The compilers available for MS OS/2 generally supply library functions which will execute on both 286 and 386 processors because MS OS/2 will run on these. Unfortunately, this prevents natural optimization for the 386 32-bit environment. However, we have found that it is a simple matter to boost performance by replacing some of your compiler runtime library routines. For example, if your application makes heavy use of long arithmetic, you can modify the multiply and divide runtime functions to use the explicit 32-bit multiply and divide instructions available on the 386 and 486 processors, thereby avoiding the 32-bit arithmetic emulation.
Many compilers such as Microsoft C 6.0 make available the source to the runtime library. Microsoft C 6.0, as an example, also provides instructions and make-files for rebuilding the libraries.
The Citrix Support Bulletin Board has further information on these techniques, along with specific code examples that you can tailor to your specific needs.
I’ll have to ask people smarter than me about finding any of this information.
Anyways Citrix requires that you install it onto a HPFS partition. Citrix uses the Microsoft OS/2 1.21 kernel + base level for the OS. After installing and running syslevel on both they report the same level.
MS OS/2 Base Operating System
Standard Edition 1.21 Component ID
Current CSD level: XR04072
Prior CSD level: XR00000
However the kernel naturally is different as this does support multiple users. By default Citrix is setup for async terminals, and as far as I can find there was no actual LAN connection product available. This is just simply the most common setup of the era, where UNIX was typically deployed with async terminals, and with remote users on dialup. The Citrix media I have is dated from January 25th, 1991. Although according to the ‘official timeline (pdf)‘ version 1.0 was released in 1990. This was just after the protected mode version of Windows was demo’d to Bill Gates & Steve Balmer, which incentivized Microsoft to dump OS/2 for Windows. This put Citrix in a bad position as they had setup their product strategy around the next generation OS from Microsoft which had for all intents and purposes had been made obsolete overnight. And as the Windows 3.0 juggernaut picked up steam selling over 4 million copies, while all previous versions of Windows combined were only in the neighborhood of 2 million copies. As far as I’m aware, none of the OS/2 1.x sales numbers were ever released.
Citrix 1.0 is limited to OS/2 1.2 character mode executables. And there simply isn’t that many. And with the industry moving to the aforementioned graphical Windows 3.0 applications Citrix hit the market with a thud. Citrix provides support for the following applications:
Borland Paradox 2.0
California Software Products BABY/4XX
Data Access DataFlex
IBM DisplayWrite 4/2
IBM Platinum Series 2.0
Irwin EzTape OS/2 Tape Backup Software
Lotus 1-2-3 Release 3.0
Maynard MaynStream OS/2 Tape Backup Software
Micro Focus Cobol/2 Workbench
Microrim R:Base 3.1
Microsoft BASIC Version 7.0
Microsoft C Version 6.0
Microsoft LAN Manager 2.0
Microsoft Word 5.0
Microsoft SQL Server
Novell NetWare Requester for OS/2 V1.3
Word Perfect 5.0
As you can see, this isn’t a very large list.
There is a text panel/menu driven config program. This greatly simplifies tasks. I setup a simple system with a single com port, although Bochs doesn’t do anything sophisticated like modem emulation but rather you can connect ONCE to the VM, and that is is. But it’s enough to launch HyperTerminal to get a serial connection.
The serial support on Citrix is pretty good as long as you have updated to CSD MU01091 which adds support for VT100/VT220 terminals. With a tiny cheat sheet it’s not too hard to get used to the multitasking capabilities of Citrix/MS-OS/2
I can really see the value at the time of Citrix, although again it really arrived just too late to the market. I’ll have to track down more of these ‘approved’ programs, and give them a shot.
It’s funny how the market can pivot where something that was seen as a defining feature of midrange OS’s in this case being multiuser became irrelevant as CPU prices dropped to the point where not only can individual users cheaply obtain their own processor, let alone own multiple which is typical today. While Citrix was chasing the ‘killer feature’ of UNIX being able to host multiple users on a single ‘larger’ machine, the industry rather prefered to host server applications on cheaper ‘large’ PC’s, ala MS SQL Server, SNA Server, and Exchange Server. With absolutely no data to back anything up, I suspect that SQL Server 4.21a may have moved more copies than Citrix 1.0. If not I can gaurentee that SQL Server 6.0 sure did.
That said once, Citrix re-tooled their ICA offering onto Windows NT 3.51 they could reach their niche market of hosted applications in a data center. And obviously taking over Xen, and jumping onto the virtualization market was a good move to keep relevant, especially how Microsoft had twisted their arm during the Windows NT 4.0 transition.
As you can see, not a heck of a lot there. I didn’t even know they were kept around, but rather I had a feeling that they were part of those big ‘wise’ investments where companies pay an insane amount of money for old tech companies, and promptly shut them down.
Compuserve is owned by AOL, who in turn along with Yahoo! was bought by Oath: a division of Verizon. And what is interesting there?
Yep, they are indeed moving everything they have bought to OpenStack, and killing everything else that can’t easily make the jump. From someone who works in the field I know that the people who sign checques always are more interested in new and exciting than anything old, associated with older companies, and older executives that have either moved on or out of the way creating that power vacuum that jr’s crave. And in that bussle it’s time to kill the old.
Too bad it’s never preserved, nor do they honestly ever care about the brands they spend so much money on removing from the market to remove any chance of resurgence in competition.
Personally I’d just see it as a waste of time and effort, all this buying and shutting down. All it tells me is that Verizon knows that it fundamentally can’t create a messenger that could rival AOL instant messenger, nor could they run a communications forum longer than Compuserve so their only way to clear the space and remove any doubt is to spend billions to shut down zombie corporations who have been doing their best to destroy themselves for the past 20 years.
Look no further than AOL’s own acquisition of broadcast.com, and how within the space of 3 years AOL took it from a company to simply paying 5.7 Billion USD for a $9.95 domain name.
What the heck is this? It sure could have been made a little more legible but it means that your BIOS needs to have the hardware assist turned on for virtualization. This kind of thing just reminds me so much of OS/2 and it’s SYSXXXX errors from back in the day.
Speaking of, once VMWare was running the display was incredibly tiny. This image really doesn’t do it justice, but it’s frankly impossible to read.
There isn’t much in the way of help for VMWare Player (aka freeloader) version users, however some playing around and I found an acceptable solution.
Simply find the shortcut’s location and jump to the compatibility tab, and set the “Override high DPI scaling to “System (Enhanced)”, hit OK and you are now good to go!
Now you can actually read what is going on. Also for anyone who cares, MS OS/2 1.21 really should be on a 100MB disk or so.. large disks & VMWare’s IDE don’t play along so well.
I think this is the proverbial OS/2 holy grail, a shipped copy of Microsoft OS/2 2.0
From a press release:
Coral Springs, Florida based Citrix Systems Inc has a new release of its multiuser implementation of MS-DOS. Multiuser 2.0 is designed to run any combination of MS-DOS, Microsoft Windows and OS/2 applications concurrently, and to provide all key features of commercial-grade operating systems multiuser, multitasking operation with terminal support, security, resource management, remote access and administration utilities. It is claimed to be a 32-bit operating system for Intel Corp iAPX86 machines from the 80386SX up. It is claimed to be compatible with Novell Inc NetWare, Microsoft LAN Manager, IBM LAN Server, and Banyan Vines networks, enabling it to function as a low-cost network extender. The ability to run graphical applications at the console will be available next month, with support of graphics at the terminal level will be added in April as a no charge upgrade. Citrix Multiuser 2.0 is $1,000 for a five-user package; doubling the number of users is $500, regardless of how many there were originally. An unlimited user licence is $2,000 once you’ve bought the five user licence. Out next month.
Looking at the copy I have, it’s strictly for OS/2 and MS-DOS programs. There isn’t any hint of it supporting 32-bit OS/2 programs, so I have the suspicion that this is like the OS/2 FOOTBALL beta, which was the 1.0 kernel with 386 based paging (virtual memory) and v86 mode support for multitasking MS-DOS. The manuals also state that there is no support for Presentation Manager either at the console or remotely. So it appears that like Citrix Multiuser version 1.0 it is strictly text mode based.