Differences Between JET Version 2.12 and its Predecessors Title Page now appearing in CGA and Hercules-compatible modes Dos-ability: Copy protection has now been removed. All files may now be loaded onto hard disk. Select from multiple scenery disks on a single drive. Concurrent drivers (memory allocation): Jet no longer needs to be loaded in fixed memory locations, which, in previous versions, precluded various drivers. Now JET runs with many other programs or drivers loaded. Works with IBM PS/2 line (Micro Channel) New Menus more readable, consistent for all display types, DOS friendly more selections: screen displays, scenery areas full mobility throughout (forward/back and exit) 'x' in any menu returns you to DOS New Demo including: sample aerobatics target strike simulation parachute ejection positioned text messages as demo progresses sampling scenes from the best of scenery disks Demo scenery is also available for free flight mode. Zoom factors: 1, 2, 3 .. 9, doubling each time instead of 1, 2, 4, and 8 Higher Resolution Displays: EGA 320x200 This display is twice the resolution of a standard EGA screen, and 16-colors are used, as opposed to the four-color-at-a-time CGA emulation mode. EGA 640x350 enhanced modes 1 and 2 If you have an EGA, you will probably want to use these options. Depending on what EGA card you have, how it was installed, and what type of monitor you have, will together determine which of these options you will want to use. Most EGA's with enhanced monitors we've seen look better with mode 1 ('j'). Mode 2 will use the same color combination as EGA 320x200. Mode 2 will appear marginally acceptable with many washed-out greens if you should be using mode 1. The carrier under mode 1 will appear to be floating on a black sea while in the target strike game if you should be using mode 2. Mouse control: two-button drag: forward/back throttle left: brakes, right: brake release left button: cycle selected weapon right button: center aileron and elevator forward/back: pitch control (elevator) left/right: bank control (ailerons and rudder coordinated) Loadable scenery files (no longer only scenery disks): Run the program on this disk called "mscenery," and follow the directions given there to convert your SubLOGIC scenery disks to work with JET. To select the scenery disk you want from within JET, type 'e' for "Load Scenery" on the Operating Mode Selection Page. The second subsequent menu will allow you to choose a scenery area from among those in your current drive's selected subdirectory. This means you should generally place all your scenery files in a subdirectory with your JET files. Old-style SubLOGIC scenery disks are still (again) supported and selectable from the Scenery Selection Menu (which is new, and provides much more flexibility). If you use Scenery Disks (as opposed to scenery files), these scenery disks must be placed in drive "A:". Particularly useful if you have only a one- or two-floppy drive system is the option (from the Scenery Selection Menu) to scan another drive for scenery files. In this way, converted scenery files may be accumulated in the default subdirectory on any available disk drive, not necessitating scenery files to exist in the same subdirectory or drive as the original JET program. Using an IBM FSII disk as a scenery disk will allow you to fly around the standard FS scenery (a previously unadvertised feature. Landing Gear Now the jets are physically (visually) equipped with landing gear, which is visible from tower viewing mode. Joystick(s) You may enable up to two joysticks now, with the second stick being used as a throttle. When enabling a second joystick (from the keyboard selection menu page, with repeated 'j' keypresses), have the first joystick centered, and the second joystick pulled all the way back, to indicate the throttle idle position. The joystick routines have been improved to fly more consistently on the full spectrum of IBM and compatible machine speeds. Coordinate Systems Access: As never before, JET allows you see where in the coordinate system you are flying. This allows you to compare your actual location versus where you may think you are on a scenery disk, or the default scenery areas in JET. Pressing 'z' while flying the JET toggles location information which is displayed at the top of the screen. Use this information to set coordinates at the "Scenery Load Menu" to be able to avoid having to fly great distances to get where you might want to be. Internal improvements: Overall speed improvements Flight characteristics improved Higher precision calculations Properly restores current time on exit to DOS Requirements: Jet requires 120K of memory, after DOS has been loaded. For this reasons, "128K" PC Jr.'s, which typically have about 80K of memory after DOS has been loaded, won't work with Jet 2.12. NOTE on Version 2.12: A bug was found which prevented some scenery from displaying as quickly as it was designed to function on the faster machines. This bug is now fixed in this version. All other aspects of JET are identical. Another bug involved the scenery buffer to overflow. Jet Demonstration Program This disk also contains a self-running demo of SubLOGIC Jet for the IBM PC/XT /AT, PS/2 and compatibles. To begin the demonstration, place the floppy disk in any available drive, set DOS to that drive (if you're not already there), and type "jet" at the DOS prompt. After viewing the title page, press the SPACE BAR to continue. A menu will appear listing screen display options. Select the appropriate screen display, keyboard, and demo mode by typing their associated letters. From this oint the 10-minute demonstration will repeat continuously, until either the machine is turned off, or ESC is pressed. ESC returns the machine to the game selection menu. The files on this diskette may be loaded onto any hard disk and run in the same manner there as from the floppy disk. SubLOGIC Engineering