Sharp MZ

I think I was clear:

hlide wrote: ↑Wed Jun 08, 2022 8:43 pm Either you replace them with more modern caps like the ones in timh's last picture or you just remove the depleted ones.

We had 220V and now we have 230-240V so most of those caps will blow quickly if you persist to use the paper ones anyway. If replacing, use 270V versions.

I'm indeed coding that star field as an exercise and yes there is no need to use stack for that : The critical section to be drawn is so short: ... EX DE,HL ; save the current VRAM position for the next iteration ; Start of the critical section of BLNK signal LD (HL),C ; clear the previous star char...

Indeed. From Left/top to right/bottom: NEXT_BAR: SUB $40 ; A' = (A - $40) MOD 256 JR C,@f ; if A == $7x then A' = $3x and skip the next instruction else A' = $Fx and execute the next instruction ADD $84 ; A'' = $Fx + $84 = $7x' where x' = (x + 4) MOD 16; wrap from $7C/7D to $70/$71. @@: ... From Rig...

That's the simplest way to get those star dots though. Using other random characters would be over-complicated to deal with.

@Sdw Oh I didn't see your answer. In fact I already found out how to do so (or at least something similarly) once I understood there is only one star per line: then it is very easy to be able to draw in the full 320x200 area! FXFZna2WYAA1VVK.png A simple PUSH to draw a dot and erase the right charac...

Any technical explanation about the parallax star field? Even running on the emulator, it is quite impressive.

You don't need to solder a SCART. Breadboard, resistors and Dupont wires and an Amiga SCART cable and then you can test. It doesn't need to be permanent. The issue is to discover whether your RF box is the culprit.

(Answers from https://www.facebook.com/groups/sharp8bitmz/permalink/3196131587370272) I would check around the horizontal drive for a dodgy gnd connection, a faulty resistor/capacitor filter combo or the ic itself. It looks like it may be on the linearity side This is the spec sheet for the ic and h...

Ah sorry!!!! I thought about MZ-700 so yeah you may need 5V and 12V. And I wonder whether -5V may also be needed. But anyway, there are Meanwell PSUs which can provide those different voltages.

Do not bridge the connections! Either you replace them with more modern caps like the ones in timh's last picture or you just remove the depleted ones but never ever ever connect them with conductive wires (that's what we would call a short circuit!).