Denial

There is no schematic to it really - Meanwell switch mode power supply is a single unit and there's also a bog standard 9V AC transformer both wired up to a single fuse and switch to live, the other side is a straight connection to neutral, and earth (ground) goes to both the metal case of the switc...

It's a bit "boxy", in my opinion.

The power supply I built for my Vic uses a Mean Well RS-15-5 and doesn't exhibit this fault. (I definitely would notice if it did, as I spend hours staring at the screen looking for artefacts that shouldn't be there for the FPGA work I'm doing). There's jail bars, sure, but not the rolling bar.

On a technical note, I soldered down the 3 level shifter chips with no shorts or opens, Only To Realize I'd soldered one the wrong way round, so I removed it with hot air. I soldered it back down again the right way round, Only To Realize I'd transposed the Output Enable and Direction pins in the sc...

Masking sensitive neighboring parts with kapton tape like seen in the first video is clever I think. My dog ate my Kapton tape just yesterday. She also ate orange electrical tape, the plastic handle of my best stubby screwdriver, something white, and I caught her just before she broke into the flux...

"DIL" as in Dual In Line, yes, it is really an SOP<mumble>, with two rows of pins rather than a square with pins on every side. It's a 16-bit bi-directional level shifter, and all 48 bits are used! This board is another interface between an FPGA development board and the VIC-20's 6560 sock...

Well, that's been a hard month. Poor health and a mad rush at work have kept me from the project, but boards and components have been ordered now, so let's see what happens. I've got some 48-pin (I think), 0.5mm pin pitch DIL packages to solder (3 of them), so that'll be interesting - Does anybody w...

Some good suggestions there - thanks!

Wotcha! I'm putting together a video, and I need a shot of a VIC-20 playing a game that most people will recognize but is more graphically dynamic than the venerable PacMan. I want something with movement , sound , c o l o u r s , and dancing elephants . Well, maybe not the elephants. But something ...

I'm still waiting for a post like this:

"Full set of VIC-20 documentation. UNTESTED".

Has anyone ever tried to make a SX-20? Hey at least it would be more legible on that 5" CRT. - A video conferencing system by Cisco - A stopped-flow spectrometer - A boat manufactured by Bennington - An item of personal training equipment, "Squat Rack" whatever a squat is. - A member...

I've built a Vicky Twenty, and it is rock solid, zero problems with random characters showing up, and I've not observed any NMI problems. I built mine as a PAL version (I'm in the US and needed a PAL system, and this seemed to be the cheapest and most enjoyable way of getting one). I'm using 65C22s,...

I'm still working on this - I'm pulling together a new interface board for a different FPGA (one that money CAN buy), and once I've got that up and running, I'll need to get some child labour in to play games and spot things that aren't right. Nice! Which FPGA are you looking at? Trion T20 is my cu...

I'm still working on this - I'm pulling together a new interface board for a different FPGA (one that money CAN buy), and once I've got that up and running, I'll need to get some child labour in to play games and spot things that aren't right.

Maybe the switching frequency inside the switched mode power supply is similar to one of the video frequencies (frame rate, line rate, dot clock, colour subcarrier)?