Been thinking about how to bodge shadow graphics memory on to the memory expansion for the BBC I designed. I have 4 boards left so it should be easy to cit a few tracks and add a board with a static RAM and PAL for the additional address decoding. A few bodge wires and cut tracks will be the rest. If it works I’ll layout a new board!
> On Thursday, NHTSA said it had discovered in 16 separate instances when this occurred that Autopilot “aborted vehicle control less than one second prior to the first impact,” suggesting the driver was not prepared to assume full control over the vehicle.
> CEO Elon Musk has often claimed that accidents cannot be the fault of the company, as data it extracted invariably showed Autopilot was not active in the moment of the collision.
Sigh. 🤦♀️
Finally swallowed hard, bit my lip, and pulled out my two Acorn A3000s to look at the battery damage. One of them is one I has had since new in 1989. The other is one I have acquired and looks newer. Anyway there was some damage but nothing really bad. Both are having the white vinegar treatment. Here’s my original after some vinegar treatment. At least they wont get worse. Gives me time to fix sort them out properly.
So progress is slow. Bleeping out shows there are no shorts and all the connections go to the right place. However I seem to have run out of turned pinned headers (needed for the stacking connector) and 16 and 28 pin IC sockets. So I have ordered a bunch of parts. However looking at it so far it should at least work for sideways rom provided I got driving the clock pin on the latch right! (Its latched on a rising pulse and the data lines are held beyond the end of the 6502’ high clock which means data is still valid when the not write goes high! Not write is inverted read not write NANDed with the clock)
Acorn Electron user port cartridge that will slot in to the Electron Plus 1 and similar.
Decided my previous #introduction was a little brief. So here's a less brief one. Became interested in electronics as a child thanks to an uncle. Moved from that to coding in the very late 70s. Got my first computer, a BBC Micro in the early 80s and I still have it. Went off to uni and studied physics and astronomy. Had a brief sojourn in accountancy. Returned to uni and studied computing and electronic engineering. Three years as a post doc research assistant working on a gravitation wave detector. Created a distro of ARM Linux in the late 90s. Then industry developing embedded software. I'm now a tech lead. Photography, roller derby, knitting, and old computers as hobbies. Develop software and hardware for old acorn machines. #coder #EmbeddedSoftware #6502 #acorn #bbcmicro #arm #acornelectron #acornarchimedes #opensourcehardware #retrocomputing #rollerderby #astrophysics #knitting #lgbtia
Hello all. After twatter’s purchase by an evil genius billionaire and its inevitable descent further in to cess-pittery it has been suggested I come here so here I am. Leftie LGBTQ+ techy, mostly software at all levels, some hardware (generally older school), biker, knitter, model maker, roller derby player. #introduction #introductions
Embedded software tech lead - responsible for allowing people to waste their lives in front of TVs and other such devices - ex astro physicist - attic full of old late 70s, 80s and early 90s computers - plays roller derby - knitter - modeller - biker - snake wrangler - leftie - LGBTQ+ - she/her