Michael Steil 
We have recently dissected and dumped the Level 2 “Plus” version of HP’s PostScript cartridge series. This time, we will look at the earlier Level 1 “PostScript Cartridge”. Article Series There are two cartridges for the HP LaserJet series that … Read more
The HP LaserJet III laser printer from 1990 used the “Printer Command Language” PCL 5 by default, but could be upgraded with the “HP PostScript Cartridge Plus” cartridge, which contained 2 MB of ROM with Adobe’s PostScript Level 2 rasterizer. … Read more
The user port of the Commodore 64 exposes a TTL-level RS-232 serial port that supports up to 1200 baud1. In 1997, Daniel Dallmann came up with a very sophisticated trick that allowed sending and receiving at 9600 baud2, using slightly … Read more
This is the video recording of “The Ultimate Commodore 1541 Disk Drive Talk” at VCF West 2021. As always, if you think it’s too fast, try watching it at 0.75x speed! [embedded content] I will post the slides in Apple … Read more
In the series about the assemblers Commodore used for developing the ROMs of their 8-bit computers, this article covers the 1975 “MOS Cross-Assembler”, which was available for various mainfraimes of the era. Series Overview Part 0: Overview Part 1: MOS Cross-Assembler ← … Read more