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Forums > C64 Coding > single step debugger
2017-04-08 05:58
Account closed

Registered: Oct 2010
Posts: 129
single step debugger

Help I need a working single step debugger for c64 or a simulator that could load prg files.

Here's what I've tried so far and why it didn't work:

1) Hesmon on vice. I do soft reset; it goes to Hesmon at $8000. I choose w 0811 and cursor or spacebar. After a little bit, it starts running without stopping. I'm supposed to hit break, which on positional keymap is tab key, but it's not working. I tried other keymaps no luck, maybe it's hesmon itself.

2) 6502net - I can't load anything without a disassembly file, and it needs to be assembled in as65, which has no manual so I gave up.

3) virtual6502 - loaded prg in a compatible way (defaulting to 7ff start address). It only seemed to load 130 bytes or so, the rest was blank (the program was 344 bytes).

4) vice monitor - I can't figure out how to easily single step. There's z (count) but how do I set the current address? There's g (address) but that just runs it.

Is there any other c64 single step programs or a working simulator?
2017-04-08 06:01

Registered: Nov 2011
Posts: 347
C64 Debugger V0.56
2017-04-08 06:16
Account closed

Registered: Oct 2010
Posts: 129
Ok thanks.

I can't figure out how to make it single step at a certain starting point.
2017-04-08 07:09

Registered: Oct 2014
Posts: 164
Typically one is debugging a running system and hence you use a break point to start debugging where you want. But if you really want to "jump" to an address and start stepping
2017-04-08 07:18
Account closed

Registered: Oct 2010
Posts: 129
Oh, you're talking about the Vice monitor. Yes that worked, thank you!
2017-04-08 07:21

Registered: Mar 2007
Posts: 51
C64Studio would also fit the bill, it remotes to VICE and provides Run To Cursor, break points and step variants.
2017-04-08 12:57

Registered: Dec 2015
Posts: 54
C64 Debugger V0.56 by Slajerek/Samar, it can even do single-cycle stepping, you can also feed it a file with breakpoints, compatible with the format Vice uses. It takes a bit of time learning how to use it properly, but once you have... Damn, it's handy! ;)
2017-04-08 16:32

Registered: Sep 2006
Posts: 202
Just RTFM ;)
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