Denial

Had to show this, I think it is from an Australian add (not sure). Most Probably not commodore brand at all, but look how the monitor's design matches the vic20 and datassette.... Stunning! I wonder if it was from a third-party manufacturer making hardware to match commodore stuff? If not, this is ...

Strange coincidence - I'm from Australia and have also just received an NTSC VIC today to play with. I already have four PAL VICs. In response to the OP, These are the differences between PAL & NTSC VICs: Different VIC chip. PAL has 6561 and NTSC has 6560. Different Kernel ROM. PAL has 901486-07...

The colour saturation on the second mod was much higher! Especially on the colour blue, the colours were so saturated I actually had to turn the colour control down on my 21 inch Sony TV. Richard Very interesting. One thing, which I may not have mentioned is that the variation in colour saturation ...

I think the issue with low colour saturation has to do with the behaviour of display devices. In composite displays, the video circuit has a sync pulse to normalise everything to. Evidently the chrominance burst does not get normalised separately from this, hence you can have high colour saturation...

The data sheet mentions the chroma output of the VIC chip already *is* buffered, albeit with a high impedance. Unless the signal catches some extra noise, I'd then expect no different outcome regardless whether the signal is buffered for low impedance, or not: even if the voltage division at the 75...

Do you have a 180 ohm resistor in that location? That would be like the two prong VIC-20's video circuit. I'll check my other VIC-20 CRs. It turned out that one CR VIC had the 180 ohm, the other had a 240 ohm resistor. Seems as though Commodore were tinkering with the circuit quite a bit. The 'two ...

Hi a4000bear, I've noticed the colour level in the composite signal is different between original VIC-20s and VIC-20 CRs. Here in the UK, our original two prong VIC-20s have a relatively low chrominance signal in the composite video output, which produces quite a clean video signal on a monitor wit...

Thank you e5frog and rga24 for your experiences. I modified those two VICs I recently received yesterday, and have come to the conclusion that the low colour levels are caused by faulty VIC chips. Both new machines had low colour. My two original modified VICs have plenty of colour. I confirmed this...

In regards to the concerns about the colour circuit in the S-video mod, I have considered the following: The primary concern for me is to get the highest possible picture quality with the minimum modification to the VIC. Especially in regards to cutting too many tracks and adding components that do ...

Bearing in mind that, in general, the output of the two prong is better quality than the CR Vic, does this hold true for the S-Video mod? To be clear, is the S-Video mod better on the two prong vs the CR? :) There will be no difference between the two after the mod, except the E-version (two pin) V...

I have heard reports that a strong sodium percarbonate solution will remove yellowing from plastic too. I tried it for myself and it works very well. In Australia, sodium percarbonate can be purchased in supermarkets as an 'oxy booster' for laundry use. Brand names include 'Nappi-San' and 'White Kin...

I have recently obtained two more VICs. One is a CR model, the other is the earlier version with the two pin plug. This gives me the opportunity to also modify and document S-Video for the early model VIC. I have already done the 'before' screenshots. I had forgotten how terrible the video quality o...

Its certainly a strange one! I agree with e5frog, it might be worth opening the case and checking and reseating any socketed ICs. Also look for any foreign material that may be in there, especially if any insects or mice have made a home there during the long years of storage. I'm thinking the fault...

I remember 'Edible Electronics' They were in (I think) Park St Abbotsford, not far from Victoria St. I remember going there one day to buy a VIC-20 game, and I saw my first ever C-64 on display. I had to have one! In regards to your description of your keyboard, the VIC I had was an early 2-pin one,...

As far as I'm concerned, the only viable way to correct the VIC's video problems is to do the modification to S-Video, which can be found in the Wiki, or elsewhere on Denial.

Composite PAL and NTSC are never really much good for displaying computer graphics, and very little can be done to improve it.