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-
- Documentation for MegaBoot v1.0
-
- by Darek Mihocka and Ignac A. Kolenko Jr.
-
- MegaBoot is yet another program to stick in your AUTO directory.
-
- It has 3 functions:
- - do a quick memory test
- - switch to medium rez (if in color)
- - and load the DESKTOP.INF appropriate for the current resolution
- (a MUST for anyone with 2 monitors and a hard drive!!!)
-
- 0. System Requirments
-
- MegaBoot must be placed in the AUTO directory of your boot disk. This
- can be either A: or C: if your hard drive boots automatically.
-
- MEGABOOT.PRG should be the first file in your AUTO directory. This
- allows the memory test to test all of memory, before any RAMdisks take
- part away. This also allows other AUTO programs to function in 80
- columns, which is usually better than looking at a wide 40 column
- display (especially if you just switched from mono!).
-
- If you encounter any problems with this program, or have suggestions for
- other features that could be put in, contact Darek Mihocka on Compuserve
- at 73657,2714 and on GEnie as DAREKM.
-
- Also if you have any questions regarding the aSTronomer, MegaBlit, or the
- ST Xformer, feel easy about dropping a message. Our software is free.
-
- the aSTronomer is Ignac's star chart program from the latest START.
- MegaBlit is GEM based drawing program, soon to become avaiable as a Degas
- Elite compatible accessory, with a built in shell.
- The ST Xformer is an Atari 800 emulator that will soon appear in ST Log
- magazine.
-
- *************************************************************************
-
- 1. Memory Test
-
- The memory test consists of a 2 pass destructive test of the heap. On a
- 1 Meg machine is takes about 3 seconds to completely finish. At boot up
- time, less than 100K of memory is actually used, so most of the
- available memory is tested. The 32K of screen memory will show it's
- defects (if any) very clearly, and any defects in lower RAM will
- probably result in the computer not booting. So the memory that is
- tested is what will be used by accessories and applications.
-
- The first pass writes hex values $FF to all the memory locations, then
- goes back and checks them all. The second pass then does the same thing
- with value $00. If any bytes change in value, the memory test is
- reported to have failed, otherwise it passes.
-
- If the memory test does fail, use a more complex memory testing program
- to isolate the exact memory location that fails.
-
- 2. Medium Resolution
-
- The ST normally boots up in lo resolution if it is in color. This
- results in a 40 column desktop. By switching to medium rez, you can save
- the DESKTOP.INF file to allow it to boot up in 80 columns next time.
- However, any programs in the AUTO directory will still be executed in 40
- column mode, since DESKTOP.INF is loaded after the files in AUTO
- execute.
-
- MegaBoot solves this problem by switching to medium resolution right
- away. It must be the first file in the AUTO directory.
-
- 3. DESKTOP.INF
-
- A major problem with having 2 monitors is that a desktop saved in
- monochrome will boot up in 40 column mode on a color monitor. This
- usually results in half the icons and windows being off the screen,
- especially if you have a hard drive with 10 or more icons!
-
- Conversly, a desktop saved in color will boot up in monochrome with most
- of the icons bunched up in the top half of the screen.
-
- To solve this, you must save DESKTOP.INF twice. In monochrome, save it
- and then rename it to DESKTOP.HI. In color, save it and rename it to
- DESKTOP.MED. MegaBoot will then copy the appropriate file to DESKTOP.INF
- so that the desktop comes out properly.
-
- DESKTOP.HI and DESKTOP.MED can be changed to hidden files so that only
- DESKTOP.INF appears on the desktop. Remember to update them if you wish
- to modify DEKSTOP.INF, since DESKTOP.INF gets erased on every boot.
-
- *************************************************************************
-
-