Electronics VI 202

Hello spensor hmm... XP2 - power. I have a 5-pin socket in my console, and a 7-pin socket here. if you look at it, it turns out that I connected GND to NC, and +5 to +5, as it should. It doesn't seem like it should work. but the strange thing is that on the 9 meter channel in this situation vertical gradient stripes, red-blue-green. what would that mean?

Hello ch41ns4w ch4> I have a 5-pin socket in my set-top box, and here it’s a 7-pin socket. As far as I remember, the wiring on the board was universal. Basically find out somewhere, no problem - +5V goes to the leg of almost any logical chips with the maximum number, GND to the maximum number/2. Well or on legs Z80 (11 +5V, 29 GND). It all depends on what kind of picture and what kind of TV (maybe there is such a smart one that if there is no signal, it draws stripes). There is an option when a computer without ROM draws vertical stripes in full screen - #FF (code RST38) is read from an empty bus and percent executing this command fills the stack (all available memory, RAM, including including VideoRAM) by the return address, that is, in this case, code #0038. You will see a binary display of this code on the screen - if I’m not mistaken three and two-pixel stripes in white-blue-black colors.

Hello spensor spe> It all depends on what kind of picture and what kind of TV (maybe there is one spe> smart that draws stripes in the absence of a signal). When there is no signal, my mailbox draws a blue background. spe> in principle, finding out where something is is not a problem - +5V practically goes to the leg spe> any logical chip with the maximum number, GND to spe> maximum number/2. Well, or on legs Z80 (11 +5V, 29 GND). I shouldn’t be a metal worker. Now I'll try to connect the power as written according to the scheme. And maybe I’ll screenshot the magic stripes. :)

Hello ch41ns4w Launched. There's a lot of interference in Tuev's box, but he doesn't care about that - the spec seems like garbage The screen sometimes gurgles with a beeper, sometimes it gets stuck on reset. It turned out that the ROM was killed. Overheats. In general, all the necessary information on replacing the ROM has already been received (thx2jtn), All that remains is to decide on this great feat.