Search found 9 matches

by retrocant
Wed Sep 15, 2021 10:12 am
Forum: Dragon Hardware
Topic: Dragon 32 RGB SECAM and video tests
Replies: 30
Views: 6285

Re: Dragon 32 RGB SECAM and video tests

Greetings, I enclose the prototype pcb of how the idea of removing the RGB signal from Dragon32 / 64 would be, I have tried the following idea: Integrate the board into the VDG, but as is being discussed you have to unsolder the VDG chip. integrate the YUV signals by cable method without actually de...
by retrocant
Wed Jul 28, 2021 11:40 am
Forum: Discuss This Site
Topic: new Member Spain
Replies: 10
Views: 2148

Re: new Member Spain

Greetings pere, personally I am in favor of putting a socket to the vgd chip, but certain people can choose whether they want to put it or not, there are also certain users who do not know how to desolder, and the final decision of each one must be respected. With which I am considering the possibil...
by retrocant
Wed Jul 28, 2021 8:22 am
Forum: Discuss This Site
Topic: new Member Spain
Replies: 10
Views: 2148

Re: new Member Spain

Greetings pere, it is correct in what you say in the signal output, RGB + sync. The part about the location of the pcb, my initial intention was to connect it directly to the vdg, but yesterday I realized that it had no socket. I had the idea that it had a socket since my American tandy 2 computer, ...
by retrocant
Tue Jul 27, 2021 2:52 pm
Forum: Dragon Hardware
Topic: Dragon 32 RGB SECAM and video tests
Replies: 30
Views: 6285

Re: Dragon 32 RGB SECAM and video tests

Thanks for the information about the diode, I was already thinking of putting a 1n4148 diode but you have confirmed it, I am not going to remove the vdg chip, since I have seen that it is already soldered on the board, I have an American tandy coco 2 and it has a socket and I had in Mind the one wit...
by retrocant
Tue Jul 27, 2021 12:27 pm
Forum: Discuss This Site
Topic: new Member Spain
Replies: 10
Views: 2148

Re: new Member Spain

thanks pser1.
by retrocant
Tue Jul 27, 2021 9:28 am
Forum: Dragon Hardware
Topic: Dragon 32 RGB SECAM and video tests
Replies: 30
Views: 6285

Re: Dragon 32 RGB SECAM and video tests

Greetings, thanks for reporting the bugs I had, especially the U3D buff would have toasted .. You are right in the part of the signal And that you have to take it after the multiplexer I have not realized it .. I rectify it .. what the friend robcfg comments, I do not put two physical vdg chips, but...
by retrocant
Mon Jul 26, 2021 5:26 pm
Forum: Dragon Hardware
Topic: Dragon 32 RGB SECAM and video tests
Replies: 30
Views: 6285

Re: Dragon 32 RGB SECAM and video tests

Thank you very much for publishing the missing information, I have already made the schematic and I intend to make a pcb and it will be signed by you as the author of the project. very grateful for your work.

Image
by retrocant
Sun Jul 25, 2021 8:29 pm
Forum: Dragon Hardware
Topic: Dragon 32 RGB SECAM and video tests
Replies: 30
Views: 6285

Re: Dragon 32 RGB SECAM and video tests

Azerpy wrote: Sun May 09, 2021 6:17 pm Here are the schematics.
circuit rvb.jpg
Greetings, could you complete the value of the resistors that has to be put, I would like to carry out tests to be able to make a pcb.
by retrocant
Sun Jul 25, 2021 8:16 am
Forum: Discuss This Site
Topic: new Member Spain
Replies: 10
Views: 2148

new Member Spain

Greetings, my name is Alfredo and people in Spain know me better as retrocant. I have been in the retro world for more than 4 years and they have a good collection of 8, 16 and 32 bit microcomputer equipment. Already in the 90's I knew the dragon computer through computer science books and now I cur...