Hello Rupert,
> On October 25, 2019 at 6:09 PM Rupert Boleyn <xxxxxx@gmail.com> wrote:
>
>
> On 26Oct2019 1407, Thomas RUX wrote:
> > Hello Rupert,
> >
> > The Computer Programming rules on CT LBB 2 1977 page 31 gave a
> > hint that the computer's model number limits the jump rating
> > because of the CPU processing capacity having to run the
> > appropriate jump program and navigation program at the same
> > time.
>
> That's true, but if you look at the size of Jump programs, Jump
> 1 is size 1, and all the rest are size 2, so it's not much of a
> limit. 2nd edition (1981) is much less kind - model restricts
> jump number and the programs for jump 3+ are larger as well.
>
You are correct that most of the CT LBB 2 1977 programs took up less space than their counterpart in CT LBB 2 1977/1981 allowing Model/1bis and later computers to run both the jump and navigation programs at the same time. I agree that CT LBB 2 1977 did not have much of a limit placed on eight out of the nine available computers, however the Model/1 is limited to operating a J1 drive.

The CT LBB 2 1977/1981 edition changed the computer program size requirements which exceeded the CPU size capacity to fit with the CT LBB 5 HG 2e requirements which has resulted in the Computer Model number limiting the jump drive rating.

Tom Rux