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Everything posted by tjb
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Wow, thanks! It seems there's a whole community of VIC-20 enthusiasts I never knew existed!
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Writing Stand-alone assembly programs with ca65
tjb replied to tjb's topic in Atari 5200 / 8-bit Programming
Thanks for the info. I just finished converting my current project to ATAsm. Previously I had a small C program to set the graphics mode and then call an assembly subroutine to set up a VBI routine. The C program would then simply loop. Now with it's all in assembly the code size shrank considerably. Apparently CC65's library functions get linked in as a whole. I sort of thought it would only link in code you actually used but this doesn't seem to be the case. In any case I got the end result I was looking for, thanks. Most of the changes were due to my using the parameter passing scheme of CC65. tjb -
An unexpanded VIC doesn't have enough RAM to play dumped carts. IIRC (from 20+ years ago) although the carts are only 8k, you need the 32k expansion in order to run the cart dumps. Thanks for the info. I didn't even consider the amount of RAM (or lack thereof). I have a cardboard expansion inteface (by CardCo) that allows you to use RAM expansion modules but alas, I currently only have an 8K one. For some reason I was thinking I had two 16K expansion modules, oh well. I tried loading the images from the .D64 file inside the WinVICE emulator and while they loaded, I could not get them to run. tjb
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There are a number of .prg files (cart dumps I believe) floating around for the VIC-20. Can you simply create a .D64 disk image with these files in order to be able to play them on a real VIC (using a XE1541 cable)? I managed to use the D64 editor program to add some .prg files to a .D64 file. Using an emulator I tried to load them using "LOAD "pgmname",8,1". I then tried using SYS 40960 ($A000) among other things but had no success. Is there something special I need to do? Any help would be most appreciated as I am clueless. Thanks, tjb
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Writing Stand-alone assembly programs with ca65
tjb posted a topic in Atari 5200 / 8-bit Programming
I'm familar and confortable with writing assembly routines using ca65 that interface with cc65 programs. What I'd like to do is use ca65 to write complete assembly apps. It seems the key is the .cfg file used by the linker. Does anyone have any experience doing this? Can you point me in the right direction? I know this topic has come up many times but, what assembler do you prefer to use for stand-alone work? I like ca65 quite a bit but I wonder how often it's used in a stand-alone fashion. Thanks, tjb -
There is also the Krocodile cart but I'm not sure if it's still available. There's still a page for it at the AtariAge store: http://www.atariage.com/store/product_info...products_id=291 There's also the Cuttlecart 2 but it's for the 7800. It looks like it's back in stock: http://www.schells.com/cc2.shtml -tjb
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Does anyone know of any vendors out there that sell Commodore hardware? About the best one I know is 4Jays. I'm looking for a Commodore 128 (preferably a 128D). I guess there's always Ebay. Any comments or suggestions would be most appreciated. -tjb
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Thanks much. Duh, I now feel stupid for asking. For some reason I thought the starpath games were handled differently. -tjb
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How does one go about playing Starpath supercharger games on the Cuttle Cart 2? I have a copy of the Stella gets a new brain CD but have no clue as to how to use this with the Cuttle Cart. Can anyone point me in the right direction? Any comments or suggestions would be most appreciated. -tjb
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I'd like to be able to disassemble an executable file into assembly source than can then be re-assembled. I know this is certainly possible but I'm not sure what disassembler to use and the exact steps involved. Also, is this a completely automatic process or does it involve some manual steps? Forgive if this has been covered previously. Any pointers/help/tips would be greatly appreciated. -tjb
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Thank you. I have 4 left, if anyone still wants one. 1024930[/snapback] Are there any carts still left? I'd like to get one. -tjb
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Thank you very much! The third link has a ton of classic Analog stuff!
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Does anyone happen to know where I might find the assembly sources for such classic Analog games as Planetary Defense and Firebug? I've found archives of Analog disks but they seem to be from 1985 onward. I'm interested in the earlier stuff from the likes of Tom Hudson, Charles Bachand, Kyle Peacock, etc. Any information would be most appreciated. Thanks, -tjb
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Hey Guys! I really been out of touch for awhile Since, I really don't have time to fix/finish what I started, any volunteers? Or release the source code? - Paul 1022642[/snapback] I just recently ran across your enhanced Missile Command. It's a great effort. I'm just now really starting to get into 6502 Assembly programming on the Atari and I was wondering what tool(s) you used to reverse engineer the original? Also, releasing even a portion of the source code for your enhanced version would be great. It would be a great learning tool for people such as myself. Heck, I might even be able to contribute. -tjb
