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Siddasm v2.1 (sid, sap and nsf disassembler) win32/win64 binaries

Posted by ivop, 21 July 2012 · 350 views
siddasm, siddasm2, sid, sap, nsf and 2 more...
I just cross-compiled these from within Debian Linux (wheezy) and instead of only sharing them with the person I did this for, I thought I might just as well share them with everybody. Source code (GPL) is included. The win32 binary has been tested to work with wine under Linux. I cannot test the win64 binary, but it should work as well. Note that this is a...



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RMT File Format

Posted by ivop, 22 June 2012 · 521 views
rmt, raster music tracker and 2 more...
I've spent some time reverse-engineering the file format used by Raster's Music Tracker. Included in the zip-file is rmtdump.c, a utility that came to be gradually, while exploring the format. There's also rmtformat.txt that describes the format in pseudo-assembly.

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SID 2 Gumby source code

Posted by ivop, 15 June 2012 · 316 views

Here's the source code of SID 2 Gumby.

It contains all the songs that were already posted in this thread: http://www.atariage....er-sid-2-gumby/ plus five more songs:

Hubbard:

Warhawk
Thing On A String
One Man And His Droid
The...



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SID Emulation Revisited, Atari SID III

Posted by ivop, 09 June 2012 · 484 views

I was delighted by the positive responses I got on my previous blog entry and on the forum about my SID emulator on the Atari 8-bit. I also was a bit disappointed that it turned out there already was an emulator eight years ago that I did not know about, that sounded pretty much the same as mine (some tunes were better, some were worse IMHO). But, this...



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SID Emulation, siddasm2 and shasm65

Posted by ivop, 02 June 2012 · 480 views
sid, emulation, shasm65, siddasm2
Long time, no blog.

Let's start at the beginning. In 2009 I wrote my first version of a SID Emulator, running directly on the Atari 8-bit hardware. The emulation loop ran in the main loop and synchronisation was done with STA WSYNC. I had created a raw register dump of a .sid file with a modified version of TinySid and every frame I left the main loop...



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Reverse Engineering the Macro-Assembler XE File Format

Posted by ivop, 30 January 2010 · 266 views
6502, assembly and 1 more...
On the Atari 8-Bit Forum, Heaven/TQA asked for help with retrieving an ASCII version of his demo sources in Macro-Assembler XE format. Because I recently wrote a detokenizer for Mac/65, I thought it'd be fun to try this file format too. Here's the result. It successfully detokenizes all the sample .ASM files I found in his zip-file, but I'm sure...



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demac65: detokenize MAC/65 files

Posted by ivop, 21 January 2010 · 289 views
6502, assembly, mac/65
While I was browsing some old source code, I frequently stumbled upon MAC/65 tokenized files. Being too lazy to repeatedly start an emulator to convert them to (AT)ASCII and being unable to find a program online to detokenize them, I set out to write such a program myself. With some luck, I found a description of the format in the form of an old Analog...



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Atari Eagle parts library

Posted by ivop, 08 January 2010 · 868 views
electronics, eagle
I finally compiled all the different Eagle parts I had drawn over the last year into a single Eagle library and adjusted them to be more or less uniform in look. While I was at it, I also added all missing chips and connectors. Currently, it contains the following...



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shasm65 - a 6502 assembler in sh

Posted by ivop, 30 October 2009 · 359 views
assembly, 6502, sh, shasm65
Here's the 6502 assembler I mentioned recently on the Atari 8-bit forum. The reasons to write this were:

1.) None of the assemblers I tried could generate correct code for code assembled to run in zero page and have forward references to other code in zero page, changing their operand in real-time.
2.) I wanted to write an assembler in sh (years ago, I...



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Turn monitor off in console mode Linux on an iMac G3

Posted by ivop, 20 August 2009 · 384 views
Linux, iMac
Recently I acquired an old Bondi Blue iMac G3 with a PowerPC @266Mhz and 64MB RAM. I upgraded the RAM to 128MB and installed Debian GNU/Linux on it. Runs like a charm. I intend to use it remotely to test big-endian compilations, so I wanted the built-in monitor to be turned off. After searching the net extensively, I was unable to find a solution....



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