200. !BOOT & MOSPLUS hint
     ~~~~~~~~~~~~~~~~~~~~
An interesting command provided by the MOS-PLUS ROM from Dabs Press, is
*CONFIGURE START. If used in a !BOOT file, it can be used as part of a
startup routine for loading one or more sideways ROM images, then doing a
<Ctrl><Break> followed by loading a menu. It can be done on the Master 128
only, by *BUILDing the following !BOOT file....

 1 *CON. START CHAIN "MENU"|M
 2 *SRLOAD ATSv31M 8000 4 Q
 3 *FX200,2
 4 CALL!-4

Note that you can of course use your own choice of ROM in line 2, (I have
just used the new ATS ROM as an example), and your own filename in line 1.
You should include in your menu program the command *CONFIGURE NOSTART in
order to turn the command off when you exit from your menu program. (That's
if you want to; otherwise every time you turn your machine on it will attempt
to load your menu program.)