Computers are binary but I am not.
Public Key
npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 Profile Code
nprofile1qqsrpg9wrtc8w802uu9u7veg2chrp65254zpdp64krw43dtatw56qqqpz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0dsl57q39
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Published at
2026-09-20T00:49:48Z Event JSON
{
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"pubkey": "30a0ae1af0771deae70bcf3328562e30ea8aa544168755b0dd58b57d5ba9a000" ,
"created_at": 1789865388 ,
"kind": 0 ,
"tags": [
[
"proxy",
"https://tech.lgbt/users/DosFox",
"activitypub"
],
[
"L",
"pink.momostr"
],
[
"l",
"pink.momostr.activitypub:https://tech.lgbt/users/DosFox",
"pink.momostr"
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[
"-"
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],
"content": "{\"name\":\"DosFox\",\"about\":\"Computers are binary but I am not. \\n\\nAll views are my own and do not represent my employer.\",\"website\":\"https://tech.lgbt/@DosFox\",\"picture\":\"https://media.tech.lgbt/accounts/avatars/109/292/474/052/893/586/original/3b98c7c6081257ef.png\",\"nip05\":\"[email protected] \"}" ,
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Last Notes npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox No idea what I’m going to do with it, but I’ve found a Computer C.H.I.P, the “$9 computer” from 2016 or so. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I wonder, does anyone know if the microprofessor-ii used an off the shelf case, or was it more likely a custom case? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Except what does contain a nearly identical MMU to the 68551? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox So I think I've figured out how to add a 68030 to the Macintosh ii, which would replace the 68020 and the HMMU. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox The sentence "The UKs 2026 entry to Eurovision was fully unimpressed by my Apple Lisa Clone" is certainly a brand new sentence. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I haven't bought it npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I have just managed to find a literal barn find PDP 11/05 for £160. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox So apart from the Macintosh, NuMachine and the TiExplorer - was there any other machine that used NuBus as an expansion bus? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox many?? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I'm randomly reminded of that weird time on the Bad Site™️ (Tw!tter) when the official Adadruit account started blocking everyone who even mentioned them. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I think you can probably use both - I'll imagine you'll be ordering enough of both to significantly reduce the cost of both the 16V8 and 22V10 npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox So just as I left, the connector for the experimental PDS RAM card arrived. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Why do I have that need to build a PCB specifically for getting Rhapsody on it? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox alternatively design an RP2040 into the board npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox yeahhhhh unless you use a micro usb to USB cable and have a simple passthrough on the main board npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox EE horror stories - needing to design an RFID antenna. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox The screen geometry is awful, but the macintosh 512Ke is back in the land of the living after a recap! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I thought the upgrade was a direct result of the video ROM being upgraded? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I have a really dumb experiment that I need to check. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox should be 338-6503, which is a 65C02 rebadge (https://www.cpu-world.com/CPUs/650x/Rockwell-338-6503%20(65C02).html) npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox on what should be a 6502! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox wait does that say 6503? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox cannot tell if that's sarcasm or not 😅 npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Something I'm intrigued by - and I really should look into - is how difficult it would be to interface modern-ish SRAMs to the SE/30 and other Macintosh ii computers. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I'm sorry? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I like how my hobby has gone from "I'm interested in Vintage Apple Computers!" To "my hobby is reverse engineering Apple custom ICs" npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox TwoOfThem.jpeg npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox So if someone were to hypothetically design a replacement for the Macintosh SEs BBU - what would be a good name for it? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Well it only took me about a year, but I've finally started building a Lisa DAC! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox It only took me about two years, but My DEC J11 is actually running and executing code! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Thanks to @npub1x56…v6yk and @npub1pu6…p73t for helping me with this 😅 npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I'm very very happy this worked for the first time! It's my first attempt at writing logic equations for a GAL. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox My main dumb idea is to add a USB floppy drive to a bluescsi, so you could give 1.44mb floppy support to systems that could only access 400/800k disks 😅 npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I wonder if it'll be possible to add USB host support to the #Bluescsi. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox if you're literally taking a track from the GPIO to the speaker and then onto ground - the least you can do is get the polarity fucking right npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I've seen some bad electronic design in my time - however this takes the cake. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox This thing is utterly ridiculous. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Well, huh! The guy who made the nanomac (Macintosh Plus on a Tang Nano FPGA) also wrote a MODtracker for 68000 macintoshes! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I love how the options for Apple Lisa Hard Drives is literally "spend £220 on an original profile with 5mb of storage" or "build an Arduino based emulator for £10 that can support 20mb LOS or 2gb Mac os hard drive images" npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I wonder if any of the ROMs for the 8 bit architecture prototype Macintoshes have ever appeared online. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I finally got sick of the cards in my #AppleLisaClone rattling around the place, so I laser cut a proper card cage for the chassis. Looks pretty good, and it's fairly sturdy as well! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I suppose there is already the micro:bit, as well as the assorted variants of Microsoft makecode. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Just completed a small PCB order! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Apparently I now own a 9 track HP reel to reel tape drive. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I'm just frustrated and a bit sad. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Well this looks familiar 🙃 npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox So a nice little thing arrived in the post the other day - it's a prototype ITXplus from Max1zzz! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox That appears to be correct. I think the only issue I've ever ran into with that level shifter design is if it's a relatively high frequency signal that's being converted. A few khz is fine, a few MHz and it gets a bit... Mushy. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I have the overwhelming urge to build a 4 bit TTL CPU. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Did a thing. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Also does anyone else get that sweet sweet rush of serotonin when you finally repair something? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I just realised this is only the second time I've ever seen an IC fail for seemingly no reason before. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox After a bit of careful wrangling (with my left hand firmly behind my back and adjusting the height potentiometer with a plastic tool) we have the full screen again! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Hurray! I repaired my Macintosh 128k! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox ah yes, but this is a UART adapter. The uart output will only have power, TX, RX and ground. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox annoyingly enough that'll work. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I love it when a repair is simple. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox What's the chance I know someone on here with a spare Macintosh ii logic board? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I have a faulty Macintosh 512k board. It'll checkerboard and then show this pattern. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox honestly I was quite surprised to learn about it. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox nahhh I'm an urban fox. Just near a river that weirdly has a hydroelectric power station npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox we can't. We're in rented flats. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I keep thinking about a conversation I had with my neighbour. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Just a nice simple #Marchintosh project today. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox it's been completely recapped! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox well that's odd npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox wait do you have a VRAM module npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox oh yeah LCs need a battery to display video iirc npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox don't forget to reset the PRAM! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox oh naturally - in reality it's another Macintosh Plus board, however it's using the incredibly cursed Unitron 1024 ROMs npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Oh and that is some welcome news - HD20 init works! We can access HFS hard disks! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Back home and I've been able to confirm that the keyboard, mouse and RTC are all working! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I'm ridiculously happy with how the badge turned out. Unitron used the same logo font as apple for the apple ii (Motter Tektura), so I just had to install it to laser cut a new logo out! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox And yes, I did make a case for it npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox After bad ram, a bad 555 timer (!) and realising I shouldn't mix ferrite beads and inductors - she's alive! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox One week. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Macintosh people of the fediverse! Do any of you own an original LaserWriter (I.E, from 1985) as I have a few questions! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I feel like I need to ask for help from actual C programmers. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Anyone got a 386 MSDOS system with 4mb of ram? I'm curious is Ardi Executor will actually work - supposedly it should! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox we made the sand do maths. That was the first misstep. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I'm getting very frustrated with computers not doing what I want them to do npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Spot anything different in this quadra 700? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox isn't it just! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Other I/O include a full floppy drive (!) an RS232 port (which allows the entire system to be used as a terminal!) and weirdest of all - a Modem! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox It's absolutely bizarre as the input - as you might be able to tell - is through those rubber switches (very zx spectrum-y) in Braille. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox The Australian has arrived! npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox As threatened, I've made a start on the #YACCintoshClone npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox So what does this mean? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox It bloody worked. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox So, snipped C9 out and stuck a 10nF capacitor on there and.... npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox The failure was pretty neat. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox so what did I do wrong? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox I WISH I WAS KIDDING. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox How? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Where is !BUST generated? npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox The flip flop has an input preset signal, that needs to be high before the data is latched in. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Let me explain. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox Oh my god. I finally fixed the second #AppleLisaClone CPU board. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox So for reasons that are still a mystery to me. I am likely going to be teaching a class full of 13 year olds how to solder. npub1xzs2uxhswuw74ecteuejs43wxr4g4f2yz6r4tvxatz6h6kaf5qqqthgqe4 DosFox ...so it appears that someone has found the schematics of the IWM at the transistor level.
