Originally posted by BillDowns:
Why would I get a Model 2?
Like you, I use the computer rules in Book 2 "as-is". I just assign more modern definitions to them. The "computer" refers to the entire system aboard a spacecraft with multiple CPUs for multiple computers that do everyting from monitor the hatch sensors to collecting sensor data to managing life support, etc., etc.
There are certain "mega-programs" that tax the network's recources. These are the programs listed in Book 2. They're really not single programs but more like a program-family that integrates with many subsystems on the ship.
For example, just think of how many systems Anti-Hijack has to interface with in order to work properly. Or Anti-Missile. Or even Return Fire.
The "CPU" rating is a measure of the network being taxed by these mega-programs. Sure, subcomputers and workstations remain running normally whether the CPU is full or not. If the CPU is full, does that mean the tiny program the engineer uses to monitor the heat generated by the ship's power plant stops working? Nope. The CPU is strictly a measure of how many of these mega-programs the ship's system can run at one time.
Ever had a problem where a super-invasive program, like Nortan Anti-Virus (that get's into EVERYTHING) interferes with some other application you're trying to use? That's the type of thing I'm talking about here. These mega-program accesss so many systems and tax the network's resources so much that there is a limit to how many of the mega-programs can operate at one time.
Right now, on my personal computer (3.4 GHz, 2 Gig RAM, 1 Gig Video RAM, DSL), I've noticed that there is a limit to how many windows can be opened to different web sites when I surf the net. It's about 15 windows or so. If I open that many, and then click on a link inside another web page that should open a program (maybe something taxing like watching a video, or music), my machine will just sit there and do nothing. I'll hit the link, but I'll get no response. If I close a few windows, then I can hit the link and continue my multi-window surfing.
I figure, in a future-istic Traveller-kind-of-way, the same thing is going on with the "CPU" rating of Book 2 space craft. Except, we're talking about much, much larger programs--I doubt even a size 1 program would run on my personal computer today.
The only real deviation from Book 2 that I take is the storage space. I allow any limit of these mega-programs to be held on the ship's network "harddrive".
But, the rules work the same.
So, the CPU rating is really more of a "RAM" rating. It's how many of the programs can be started, sucking system resources (that's the "Storage" number), and how many can actually be used at one time (that's the "CPU" number).
Thinking about it that way, for me at least, make a lot of sense. The computer system doesn't seem dated at all looked at with that perspective.
So, during combat, the ship's captain will decide which of the mega-programs are best used for an encounter. Let's say the captain is exceptionally wealthy and has all the programs listed in Book 2 stored on his ship's harddrive.
No problem.
If he's got a M/1 computer (CPU 2/Storage 4), he can select six mega-programs to initiate and suck up his system's resouces, but only two of those programs can be working at any one time (during a particular starship combat phase). The other four are running, but they're "minimized" and "running in the background". The ship's network can't take all six of them running full-bore together. But, the ship's navigator can switch out the programs fairly easily by simply minimizing one and using another.
During the computer reprogramming phase, the navigator can switch out is pool of six programs for another six for use in the next 1000 seconds of the starship combat.
This is, more or less, exactly as Book 2 computer rules read. And, I think the slant makes the logic a little more modern and believeable.
At least for me.
So, your question was: Why get a Model 2?
My answer to that would be: Because you'll have more choice of programs to switch out.
The Model 1 runs 6 programs, but only 2 of those can be run at any one time during a particular phase.
The Model 1bis runs only 4 programs, but all 4 can be used in every space combat phase.
The Model 2 runs 9 programs, but only 3 of those can be run at any one time.
As an example, you might want to run ECM (Space 3) during the ship's Laser Return Fire phase. You wouldn't run this program with a Model 1 bis because of its size. It would only leave you 1 space to run another program that you'd need for the entire space combat round. If you ran ECM and Maneuver, you'd be able to move and use ECM in the one phase, but you wouldn't be able to fire any weapons (because you need Target).
But, if you had a Model 2, you could run ECM with other programs. During the Laser Return Fire phase, you'd be using ECM only. But, in the next phase, you'd trade that one out for another program.
With a Model 2, you can run ECM, Maneuver, Target, and Gunner Interact. For most phases, you'd run Maneuver, Target, and Gunner Interact. When the Laser Return Fire phase came, you'd run ECM only, before trading it in for the other three programs.
So, that's why a captain would use a Model 2 over a Model 1bis.