search

keirf / flashfloppy-osd

On Screen Display and keyboard controller for FlashFloppy
The Unlicense
58 stars 15 forks source link

Inverted Mode using OSD #36

Closed jgilcas closed 3 years ago

jgilcas commented 3 years ago

I have installed a BP in a spectrum and the result has been great, but there is a detail that I do not understand, everyone appears the letters in color and to me appears the background color and transparent letters, I have reviewed configuration but can not find anything. What can be? I did not have 4k7 and I put 10k, to pull up would work the same, right? image_2021-01-05_09-53-31

keirf commented 3 years ago

Have you attached to the green signal only in the Spectrum? Perhaps you are overdriving the signal, in which case you should try connecting with a bigger series resistor to the green signal.

jgilcas commented 3 years ago

Maybe i´m wrong and my picture is ok. Let me attach two pictures.

Non Inverted? noninverted

Inverted? inverted

keirf commented 3 years ago

Sorry yes, I think all the above are correct including your original picture. Assuming you are on the green signal, lettering will be adding green and the OSD box background is subtracting green.

On the Spectrum, the white background is already "full green". You can't add more green. Hence the lettering appears like the main background (white), while the OSD background is predominantly red+blue (=purple).

On the Kickstart screen, the white background is a dull white and the analog green can be overdriven to give a pale green. Again the OSD box is predominantly red+blue=purple, but it just happens to be paler here.

And the Amiga Test Kit screen is predominantly dark red, not much blue or green. So the OSD text stands out as vivid red and the OSD box, having little of any RGB, is almost black.

So, that's just how it is :)

penfold42 commented 3 years ago

The only way to make it “better” is to use an analog switch and completely replace the original video signals. There’s a display enable signal that can be used to drive this but it’s a much more complicated install as you need to more electronics and you need to cut traces on the computer.

jgilcas commented 3 years ago

No no, this solutions is perfect for me, my mistake was not try with another backgrounds, now i tested with black background and it's perfect, awesome.

El mar, 5 ene 2021 a las 13:43, penfold42 (notifications@github.com) escribió:

The only way to make it “better” is to use an analog switch and completely replace the original video signals. There’s a display enable signal that can be used to drive this but it’s a much more complicated install as you need to more electronics and you need to cut traces on the computer.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/keirf/FF_OSD/issues/36#issuecomment-754612147, or unsubscribe https://github.com/notifications/unsubscribe-auth/AI3NSKFZDMF4QOW6DS5QQTTSYMCNTANCNFSM4VUUK3XQ .