Monthly Archives: March 2016

Children of the Bus Wars

Posted on March 23, 2016 by Michal Necasek

In the late 1980s and the early 1990s, the so-called Bus Wars raged. A few years after the PC/AT was released, it became clear that the ISA bus could not keep pace with faster CPUs and peripherals, especially graphics cards … Continue reading →

Posted in ATi, EISA, MCA, PC history, PCI, VLB | 11 Comments

Fixing a Graphics Ultra Pro

Posted on March 13, 2016 by Michal Necasek

Just a few weeks after successfully repairing a trivial problem with a Roland LAPC-I caused by improper storage, I happened to run across another troublesome board, a VL-bus based ATI Graphics Ultra Pro from 1993. It’s a nice enough card … Continue reading →

Posted in ATi, Hardware Hacks | 4 Comments

Seagate ST-225: Just Wow

Posted on March 4, 2016 by Michal Necasek

A few weeks ago a Seagate ST-225 drive more or less accidentally landed at the OS/2 Museum. The drive is nearly 30 years old (manufactured in late 1986) and rather interestingly, this particular unit comes with a label declaring it … Continue reading →

Posted in PC hardware, Storage | 35 Comments

Periscope Manuals

Posted on March 1, 2016 by Michal Necasek

Some time ago I recovered a latter-day Periscope manual from storage. Since some readers might find it useful, I decided to scan the manual and convert it to PDF. It covers the basic Periscope debugger, variants and add-ons (remote Periscope, … Continue reading →

Posted in Debugging, Documentation | 7 Comments