/tags/psidrive/Recent content in Psidrive on The Last PsionHugoen-gbSat, 04 Apr 2026 00:00:00 +0000/posts/asic4-extended-mode-addressing/Sat, 04 Apr 2026 00:00:00 +0000/posts/asic4-extended-mode-addressing/<p>Who wants a deep-dive into a tiny aspect of Psion SSDs and their ASICs?</p> <p>I was using a PsiDrive a couple of months ago to dump a 2MB SSD. However, when I tried to extract the files, my FEFS extraction tool (siboimg) segfaulted halfway through. So, as I was in a rush, I decided to come back to it another day. Yesterday was that day.</p> <p><img src="/posts/asic4-extended-mode-addressing/psidrive_and_ssd.png" alt="Photo of PsiDrive"></p> <p>My first thought was that it could be a problem with the Pico 2, either with the code or the RP2350 A2 stepping chip. So, a couple of days before, I built a second PsiDrive and put in a Pico 1. But the fault remained with with Pico 1.</p>/posts/pcbs-emulators-more/Sun, 13 Aug 2023 00:00:00 +0000/posts/pcbs-emulators-more/<p><img src="/posts/pcbs-emulators-more/1fbbe3a93b772d07.png" alt="Two copies of MAME, built from git, running ROMs from the Series 3c and 3mx."></p> <p>It&rsquo;s been a while, hasn&rsquo;t it?</p> <p>My work on this project has been relatively sporadic over the past 12 months. I&rsquo;ve not found it easy to find a balance between this, my day job, and other projects I&rsquo;m working on. As a result, there have been some relatively intensive periods of work on Psion shenanigans, followed by burnout or other priorities needing to take precedence.</p>