TRAINER mode?

[JohnnyWalker]

Hi there, as a longtime Amiga fan I was wondering if WinUAE had any capabilities to help train games? On my old Amiga 500 I used to use my Action Replay 3 cartridge to train games using the trainer command.

(For those who don't know, it was a simple thing where the AR3 would scan all available memory for a number (eg. the number of lives you had). You would lose a life and tell it to scan again. Then lose another life. Scan again. Etc. Eventually, if you were lucky, you'd find the address where lives were being stored... and so be able to be able to remove and sub routines that altered that address / or just set the address to FF.)

The A1200 had no such cartridge (AFAIK) so I was wondering if WinUAE allow the user to scan memory addresses in the same way so that all games might be trained (or at least, attempted to be trained).

Thanks!

[StingRay]

Press Shift+F12 to enter WinUAE's debugger. There you can use the "C" command then which should do what you want. "?" will show a short help text.

[JohnnyWalker]

Thanks. Looking around, I found this simple guide from CodyJarrett, too:

You've got three commands that enable you to find memory addresses:

a) C
b) D
c) s

C is used when you know the value and what it is changing to. For example, C is best for finding lives where it starts at 3 and counts down to 0. You always know how many you've got left.

D is used when you don't know the value. A health bar might not be an obvious value so you could use D to find it. It works by eliminating addresses that have or haven't changed. The commands are Ds (start/reset deep trainer), D (find any addresses that have changed since last D command), Dx (find any addresses that haven't changed since last D command).

s is a basic search and is used less than the other two. It will search for a certain value but the value needs to be quite unique or else too many results are returned.

You've got to decide which is the best command to use for each game and value.

When you've found values you can freeze them with the watchpoint command:

w <watchpoint number> <memory start address> <length in bytes> <flags>

To freeze your 1E7E6 address in Crazy Cars 3 you would do:

w 0 1E7E6 2 frw

This sets freeze watchpoint 0 on the contents of that address and the following one.

The flags are (from Toni):

FR = writing changes value in memory normally, reading always return frozen value.
FW = writing replaces value in memory with frozen value, reading returns original value in memory location. (of course only if location has not yet been written to)
FRW = original operation, both reads and writes are frozen.

[JohnnyWalker]

Hmmm. Anyone know how I can just view the contents of one address?

[CodyJarrett]

Use the following to view one line starting at address 1E7E6:

m 1E7E6 1

[JohnnyWalker]

Thank you!

[JohnnyWalker]

Argh. How do I reset the C command so I can search for a second trainer address?

Edit: Typing "C" by itself does it!