Tag Archives: PCjr

The DreamBlaster S2P: General MIDI from a parallel port

Posted on March 9, 2019 by

In the interest of catching up, here is the second blog that is long overdue. I want to talk about the DreamBlaster S2P from Serdaco. I received mine over a year ago, and it actually was an early prototype. The … Continue reading →

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Putting the things together, part 2: MIDI and other problems

Posted on February 9, 2018 by

Remember a few months ago, when I explained my approach to playing VGM files? Well, VGM files are remarkably similar to Standard MIDI files. In a way, MIDI files are also just time-stamped captures of data sent to a sound … Continue reading →

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More PC(jr) incompatibilities!

Posted on January 6, 2018 by

The race for PC-compatibility Since the mid-80s, there have been many clones of the original IBM PC. IBM themselves also made new-and-improved versions of the PC, aiming for backward-compatibility. DOS itself was more or less a clone of CP/M, and … Continue reading →

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Putting the things together

Posted on February 24, 2017 by

So, over time I have discussed various isolated things related to 8088-based PCs. Specifically: Using the latched property of the 8253 programmable interval timer to be able to adjust the interval without any jitter/skew, so you can use it as … Continue reading →

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PC-compatibility, it’s all relative

Posted on December 15, 2015 by

Update 21-12-2015: I have updated some of the information after testing on an AT with old Intel 8259A chips, and added some extra information on EISA and newer systems. I would like to pick up where I left off last … Continue reading →

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Just keeping it real… bugfixing like it’s 1991

Posted on June 8, 2014 by

As you may have noticed, the 1991 donut intro did not have any music. I did not cover it in the previous blog, but there was some music planned for this small intro. I chose to use EdLib, because AdLib … Continue reading →

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Just keeping it real… like it’s 1991

Posted on November 24, 2013 by

Last weekend, there was a special demoscene party, the 1991 party, with, obviously, 1991 as a theme. Well, that is just my bag, baby! The focus was mainly on C64 and Amiga, which were the most popular platforms for gaming … Continue reading →

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