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Introduction Atari Jam is a Windows tool for developing Atari 8-bit computer software. The theoretical concept is that it is a PBI device that maps the memory, allowing an external device to monitor and change things in real-time. In practice, this is accomplished by attaching to an external emulator and accessing the RAM. The program gives the user a suite of tools to interactively modify, tweak, test and program software. It is not intended to be a replacement for a development IDE but rather to let the user experiment and rapidly develop small projects or pieces of something larger. It currently compatible with an Atari 800XL with 64K of RAM. Features Live memory viewer/editor Interactive disassembler Assembler Character editor Character map editor Player/missile editor Graphics control (GRACTL, DMACTL, GPRIOR) and color picker Display list editor Experimental video player (AVI) Vector control Notes The video player is very limited in the input it will accept. It uses a dither pattern that will be applied each frame, using the current palette. The user can adjust colors to find the best match. The program monitors GRACTL and PM registers through the addition of an OS patch that removes shadowing for the paddles. This patch slightly reduces the cycles used by the OS during a refresh. Hopefully, this is something people will find useful. I plan to have a version ready to try by March 1st.
Hello everyone, I've made a series of 4 YouTube videos describing in detail the conceptual work, and the creation of words to implement an ANTIC disassembler tool in FORTH to compliment the ANTIC assembler that I wrote. This basically demonstrates how FORTH can quickly be used to make useful tools that can be intermingled with the development of programs in FORTH so that you don't have to load entire other programs to get stuff done, but rather just flow from one vocabulary of words to the next. Let me know what you guys, think. -Thom
Hi, New/old A8 basic coder here (haven't touched it in ~30y). Trying to remember how to use ML strings to redefine character sets... My most immediate problem is that I can't get certain characters on the screen. CHR$(127) does not output the right-facing triangle character. I need to get that in a string to redefine my character set but I'm forgetting how. The screenshot attached shows another person's program that contains said character in a string, but I don't know how it was done. I have access to Atari800MacX, Envision on a windows XP VM, and I'm open to other mac/win/a8 tools if there's an easy-peasy character set generator that outputs what I need. I also don't mind converting the values by hand into ATASCII but I figure there's easier ways My requirements are that the code be self-contained in the basic file and that it be as compact as possible, so I can't use external files to load the charset data, and I figure strings are better than data statements.
hey guys, works been slow lately so ive been working on a hack, or to be more specific, a hack of a hack. the original hack was based on motocross, but the bike sprites had been replaced pod racers. its on JDD (http://jims_digital_domain.tripod.com/dwnloads.htm) if you want to have a look. Im taking it a step further by modifying all the other sprites (done) and changing the background (also done), but I also want to change the color of the sprites and background. witch is where im at a loss, ive made mods to games that use sprites in the past shure, (EX: chris sawyers locomotion) but in those games the sprite contained the colors used in it. on the Atari however, it seems the colors must be contained somewhere in the games code, and sense both the sprites and and all other code are in binary im having a difficult time finding what determines the color of the sprites. are there common locations in the bin to look for the colors, or are there any tools that can help me find them? I would appreciate any help, thank you.