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- BOOTBUG
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- Short description, 27.01.91
- refering to version 0.10
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- BOOTBUG is used to debug bootblocks with SIM. You could use SIM-BUG for
- that but it is easier and more secure to do it with BOOTBUG because
- some games or megademos that start from the bootblock count on the fact
- that while booting, there is actually very few memory occupied yet.
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- BOOTBUG is a bootblock, so you must put it on a disk. If you do not dispose
- of a bootblockwriter then you can do it with SIM. Therefore enter the
- following commands:
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- .L df0:bootbug 60000 ;loads bootbug at $60000
- .B 60000 ;bootchecksum
- .D1 ;select drive 1
- .>s 60000 0 2 ;writes bootblock on disk in drive DF1
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- You have now got a bootbug disk. When you boot with it, you have the
- choice between:
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- - BOOT : Continue to boot
- - DEBUG : Debug with SIM in allocated memory
- - CRACK : Debug with SIM in unalocated memory
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- When you chose BOOT, BOOUBUG will boot the system.
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- When you chose DEBUG, BOOTBUG loads SIM as a file 'DF0:SIM' from the root
- directory. Therefore it tries to allocate enough memory for SIM and a display
- or backup at the highest address possible. If there is enough fastmem free,
- it allocates a backup there, if there is only chipmem, it allocates a
- display. Then you can change the disk and insert the disk with the bootblock
- you want to debug and press any button to start.
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- When you chose CRACK, BOOTBUG searches on its own for ram instead of
- allocating it. This enables you to use not configurated ram.
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