The QL-SD driver ROM is so full that every byte counts and during my search for superfluous bytes for v1.09 I removed one instruction too much. This results in a wrong value returned from the iof.rhdr call which is often not used anyway but can lead to subtle bugs in applications. Today I’ve uploaded a… Read More »
A while ago I’ve sent pre-production QL-SD ROM samples to a few testers and now Dilwyn Jones has written a review of his, read it here. Thanks Dilwyn! Unfortunately I don’t currently have much time for QL stuff and what little time I recently had I’ve invested into making a NTSC compatible QL-VGA. But before… Read More »
Hardware revisions I get asked a lot about the state of my new QL-SD, so here’s an update. The new external QL-SD variant (henceforth called “QL-SD ROM”) went through a lot of revisions: This series also exemplifies my progress as a PCB-designer. I’ve never formally learned to create PCBs, so it’s all learning by doing.… Read More »
A heap of dung I’ve been working hard behind the scenes to release a new version of the QL-SD ROM driver. The starting point was that Urs König asked me about a mysterious heap corruption with QL-SD when using his QL/E distribution under Minerva. And mysterious it was, after stripping down QL/E’s monster boot file… Read More »
This weekend the German ZX meeting was supposed to happen, but for some pandemic reason it didn’t. Which is very unfortunate because not only did I produce a batch of QL-VGAs for it, I also had a secret product in development that I wanted to reveal there: QL-SD ROM. Please note that everything I write… Read More »
Prompted by a customer request I have extended my QL-SD demo file with a few free QL games, 20 in total, including some that were never available for free before but for which I have the rights to release (basically the Jochen Merz catalog, thanks Jochen!). I went to great length to try to make… Read More »
The QL-SD driver seems to be finished (note that it currently doesn’t work with the MiST FPGA board, but there are no more known problems with either the original QL hardware or the MiSTer FPGA machine). Now the boring part has begun, which means hours of reading tax related stuff (selling stuff internationally is hard!),… Read More »
QL-SD So, a short update on QL-SD, I have spent another few hundred Euros on parts and everything has arrived except the package with the SD-card connectors, which seem to be lost in the mail. These are needed for the double-SD adapters, which I expect will be pretty popular. Instead of waiting for them to… Read More »
Just a slight update before I go on holiday for a week. The design of the MDV adapter board has been finalized and I already have the PCBs here: The board can be built into four different configurations of which I will probably offer two: Single slot drive using a ready-made daughter board soldered onto… Read More »
(Summary at the end if you’re not interested in the details) Some people know that I’ve been working for quite some time on making the QL-SD work with the late Stuart Honeyball’s masterpieces, the GoldCard and the SuperGoldCard. And I seem to have succeeded, but the way to success took a lot more time than… Read More »