Monthly Archives: May 2026

Learn Something Old Every Day, Part XXI: VGA Memory Access Is Complicated

Posted on May 8, 2026 by Michal Necasek

Last week I had another run-in with VGA emulation, and like last time, the cause was very likely the generally woefully inadequate VGA documentation. The VGA is not, all things considered, a particularly complicated piece of hardware. It has no … Continue reading →

Posted in Documentation, LSOED, VGA | 11 Comments

ICAT and Watcom

Posted on May 7, 2026 by Michal Necasek

Some time ago I embarked on a minor retro development project related to this post. For convenience, I decided to do the development on a Windows host machine and (obviously) test in a VM. For C code compiling, and linking, … Continue reading →

Posted in Debugging, Development, IBM, OS/2, Watcom | 16 Comments

When Networking Doesn’t Work

Posted on May 4, 2026 by Michal Necasek

Last week I spent far too much time trying to get my Windows 11 machine to talk to an antique Tyan SMDC (Server Management Daughter Card) IPMI module over the network. At first, I tried Tyan’s own old TSO (Tyan … Continue reading →

Posted in Bugs, Intel, IPMI, Networking, PC hardware, TCP/IP | 2 Comments