Re: [hatari-devel] resizable windows

[Troed Sångberg <troed@xxxxxxxxxxx>]

As I wrote: When you select a pixel clock (how many unique transitions) in a specific timing (border end, start) vs number of scanlines - to fit in a specific physical format (4:3) you have defined a pixel aspect ratio.

It's completely irrelevant that you _could_ make manual changes on your monitor. The above is what was define in the hardware. Any changes after the signal gets sent to the monitor is more along the lines of "monitor emulation".

This is the reason why I sourced comments from graphics artists who used to work on the platform. It's also the reason why other emulators on other platforms with non-square pixels have settings for it.

/Troed

On Mon, Jun 19, 2017 at 9:59 PM, Adam Klobukowski <adamklobukowski@xxxxxxxxx> wrote:

2017-06-19 20:55 GMT+02:00 Troed Sångberg <troed@xxxxxxxxxxx>:

I do not consider this to be "monitor emulation". Atari ST pixels were not square - it's "Atari ST emulation".

(Analogue video circuitry means Atari knew full well what aspect ratio a chosen pixel clock and timings for the horisontal line would create vs the number of vertical lines on a 4:3 screen)

SC1435 has screen width settings, so you can have any aspect you like within its min/max. SC1224 too. Other monitors too. So, I do not think that there is a special aspect ratio. As for comapring to TV signal, you can't do that because TV signal line does not have definition of a pixel, so there is no reference point there. The only reference might be TV specs, but that might be hard to dig.

 

--

Semper Fidelis

Adam Klobukowski
adamklobukowski@xxxxxxxxx