YannAros

There’s no competition here, just 2 projects that developed at the same time. The philosophy behind them are quite different, mine being to have something simple and using only of the shelf components without any programmed CPLDs or equivalent. This has its drawbacks with less flexibility and functionality. We’ve also shared information do that our product can be improved, without the_crayon_king inputs and —crosbow— push I’d certainly never had it working with ossc wich is not do common here in France as we have SCART inputs on all televisions that are more than one or two years old (it was mandatory till then).

I got some success with my diy rgb adapter! Colors must be adjusted and transition to/from white shall be improved (how?)

Looking around it seems that you need this head board for the PI Zero : https://github.com/hoglet67/RGBtoHDMI/wiki/Bill-of-Materials-(12-Bit-Board) However there seem to be no pre-build boards available to purchase anywhere. I'd like to get one, but building it is not very cost effective for one board. Is there anyone offering this?

Nice to see a report about this solution working on an apple 2c. It would be very nice if you could explain what you bought/built and how you configured it.

Hi All, Looking into possibilities to get colour out from my Apple IIc PAL, I found out that there are only few options: 1. A2M4023 "PAL Modulator/Adapter" : Almost impossible to find today, sells at high price when available 2. Le Chat Mauve RGB adapter : Even more difficult to get and more expensive 3. Video 7 adapter : Not much information, might not even work on PAL Apple IIc's, and haven't found a single one for sale in months 5. PI RGB to HDMI : https://github.com/hoglet67/RGBtoHDMI/wiki , seems to be working but I haven't seen an feedback / guide on how to set it up for an Apple IIc 4. A2Heaven : Apple IIc VGA adaptor ( http://www.a2heaven.com/webshop/index.php?rt=product/product&product_id=135 ), seems out of stock and a bit on the high price tag level Does anyone has any feedback on these solutions? Is there any other solution available, I'm looking especially at DIY solutions as I like to work on this kind of stuffs. I'm developping my own DIY solution but I'm struggling with it and would like to compare with other solutions and experience from others. I will certainly try the PI RGB to HDMI solution in the future, and I'm especially eager to have some inputs on how to get started with this, what to buy/build to have ot working on an Apple 2c. Best regards

Half success! Left : expectation, right : actual output Sync was really one of the issue, but there are further ones creating heavy banding in luminance signal and preventing some transitions to occur correctly.

Short answer, this circuit doesn’t work BUT it is almost. Apparently only sync signal superposition is not working. I will try to correct this and post a schematic if I succeed.

And what is this one? http://knox.ac.free.fr/index.php/pc/aytracker it says it’s being developed for the Intellivision!

I'm not attached to any specific tool. I'm mainly looking in a easy to put in place and as automated as possible workflow to generate Intellivsion Music Tracker files from a user firendly editor.

Hi, I'm looking to integrate music into some Intybasic games I'm creating and was wondering if there is a way to create tracks using "Arkos Tracker 2" : https://www.julien-nevo.com/arkostracker/ And then save them into a format that can converted to be used by the Intellivision Music Tracker library? May be there are other tools / tracker available for this?

Did anyone try the schematic available here : https://kaput.retroarchive.org/appleii/ ? I’d like to give it a try but would like a report before.

I've cleaned up the pins and the socket and re-socketed the ROM several times without success. The new one worked at first start.

Some good news (at least for me ?). I’ve received some disks and an eeprom with ROM v4 on it. First tested the disks and the games booted and ran fine… Basic was still not ok, but after ROM replacement it was all fine. The now working self test showed no error. So I have certainly a ROM that starts to fail and some part of basic is corrupted. It might help someone in future having similar symptoms.

The simple solution I've implemented was drafted based on the measurements and observation from @the_crayon_king but I've simplified it a lot based on the previous observations and tests I did. It simply implements SYNC as being NOT((V1 OR V4) AND V5) instead of NOT(V1 AND V5). The fix with additional diodes is performing (V1 OR V4) so that we can re-use previously produced boards. The final fix is implementing the full equation within one 4xNAND chip. Here is a link to the EasyEDA project : https://easyeda.com/yannick.erb/Intellivision-Secam-RH-RGB-Mod_copy_copy This is the French version of the board that is bigger in order to fit at the location planned for the power supply board that is not present in some french versions of the Intellivision.

Yes these chips are just rebranded by Apple. I’ll start my de soldering job soon and will have a closer look at the chips.

I’ll have to check further but the chips have the apple logo on them

Hi, Thanks for the input, I think I will have to do this and start to desolder all RAM chips and put in sockets

Hi, I just got hold of an Apple IIc that has strange symptoms. I do not have any floppy to test, I wanted to create some with ADTpro but I can't reach this point. I can boot and reach the BASIC prompt using Ctrl+Reset. Everytime I hit enter after having entered a command the Apple either jumps to the monitor or freezes. When in the monitor I can read adresses and exit monitor. I've read adress 64447 (0xFBBF) to confirm that the ROM is version 255 (too bad I can't do a RAM Check) Someone shall send me another ROM with a newer version to be able to launch the RAM test. That would rule out 2 possible causes, the ROM and the RAM. Do you have any other suggestions? Did anyone see this before, I didn't find anything related by googling. Thanks

They are at least 2 SECAM variants, the most common one is a modified PAL console. The STIC is always the same. PAL variants also have the missing sync pulses. If you take V1..V5 and clk as inputs it should work also on PAL, at least if you rely only on input signals for clocking the device.

I believe that for the Intellivision you do not need to go through rgb first, you can translate V1-V4 to any 24bit color you want and make it fully configurable for each color. The sync signal is also encoded in V1 and V5, with the Pi we don’t care about respecting the normes. Hdmi output is totally generated from the Pi, so sync signal inside is going to be normalized.

Hi I have no experience with the Pi but looking at this : https://github.com/c0pperdragon/Amiga-Digital-Video It looks very feasible to adapt it so that it takes V1-V5 as input and generates directly an Hdmi output. That would solve all issues with sync signal and additional converters.

After having solved the power supply issue I still have questions about the Inty II. One issue we have seen on the Inty II we are looking at is high level of noise in the sound channel. The noise is getting lower when game is actually playing something but it remains quite higher than what I’m used too with INTV 1 models. Is this normal? Is there something that can be done to improve ?

In fact it is OK, we've discussed it in another thread and I've tested it :

12V DC worked perfectly! it draws 0.6Amps, so a generic 12V/1Amp power supply will perfectmy do the trick! Thank you all for your inputs!

As is it is quite noisy, I’ll try with a dc power supply tomorrow