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Reverse Engineering the Macro-Assembler XE File Format

Posted by ivop, 30 January 2010 · 117 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 · 120 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 · 253 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 · 133 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 · 189 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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SID/SAP/NSF Disassembler

Posted by ivop, 12 June 2009 · 251 views
siddasm, assembly, 6502
Two months ago I found a SID disassembler at the website of Covert BitOps. I rewrote large parts of it and added support for SAP and NSF (NES) files. It tries to do some simple code-flow analysis to determine code and data blocks. The output is compatible with ATASM. Because I want to avoid...



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SIO2PC PCB

Posted by ivop, 13 May 2009 · 306 views
SIO2PC, electronics, pcb and 1 more...
I have been back using my Atari 800 XL for about six months now. I bought a MyIDE cart to backup all my old floppies. Most of them were still readable. I did not really like the MyIDE cart though. Well, the cart is fine, it's mainly the patched O.S. It's a pity it doesn't support mixing SIO and IDE devices very well. So, I dug out my old SIO2PC...



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Atari XL Look-Alike

Posted by ivop, 30 April 2009 · 102 views
VTech/Laser
Last weekend I visited a retro-computer fair. From a distance I thought I saw an Atari XL. Coming closer, it became clear it was something completely different.

There's remarkably little information to be found on the net about this little...



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Test

Posted by ivop, 30 April 2009 · 75 views
Miscellaneous
Never thought I would get my own blog, but it seems now I have one.

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