CPC joining to VGA monitor by 5 wire interface.

Started by McArti0, 16:04, 17 March 22

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McArti0

512x464 in mode 2
H 27kHz
V 60Hz.
text 64x57
;D
CPC 6128, Whole 6128 and Only 6128

Audronic

@McArti0 

Can you supply a schematic (Pinout) of how you did it ?

Thanks

Keep Safe

Ray
Procrastinators Unite,
If it Ain't Broke PLEASE Don't Fix it.
I keep telling you I am Not Pedantic.
As I Live " Down Under " I Take my Gravity Tablets and Wear my Magnetic Boots to Keep me from Falling off.

McArti0

#2
98 r=&BC00:d=&BD00
99 REM 848x480 @ 60Hz (512x464 T64x58)
100 OUT r,0:OUT d,36
101 OUT r,1:OUT d,32
102 OUT r,2:OUT d,33
103 OUT r,3:OUT d,4
104 OUT r,4:OUT d,62
106 OUT r,6:OUT d,58
107 OUT r,7:OUT d,59 <--errata
109 OUT r,9:OUT d,7

save"VGA.bas",a

https://cpcwiki.de/forum/index.php?topic=735.0

and my experimental soft from other topic. "256x256 mode 0 ......"  use first setting run 64 and after vga.bas from this topic.
CPC 6128, Whole 6128 and Only 6128

McArti0

I found interesting thing.

https://www.retrorgb.com/vgaconnector.html

https://cdn.retrorgb.com/images/VGAConnector-02.jpg

RGB-IN maybe it's not exactly the same as VGA-IN. Maybe that's why don't need a chapter between Hsyn and Vsync in TV connetor?
CPC 6128, Whole 6128 and Only 6128

McArti0

CPC 6128, Whole 6128 and Only 6128

HAL6128

It's a TV which also is able to display 15kHz pictures
...proudly supported Schnapps Demo, Pentomino and NQ-Music-Disc with GFX

McArti0

#6
Quote from: HAL6128 on 10:23, 19 March 22It's a TV which also is able to display 15kHz pictures
But native do not show picture from Amstrad. Not recognized frame format.

WATCH THIS !!!!!
CPC 6128, Whole 6128 and Only 6128

HAL6128

...proudly supported Schnapps Demo, Pentomino and NQ-Music-Disc with GFX

Skunkfish

I don't get it, is the CPC really outputting an image 1024 pixels across or is it fooling the monitor in some way? And the monitor horizontal resolution is only 720?
An expanding array of hardware available at www.cpcstore.co.uk (and issue 3 of CPC Fanzine!)

McArti0

#9
Quote from: Skunkfish on 19:55, 20 March 22I don't get it, is the CPC really outputting an image 1024 pixels across or is it fooling the monitor in some way? And the monitor horizontal resolution is only 720?

This is an example of how you can reconfigure the CRTC chip in Amstrad and OS to use all 65kB Video RAM. Amstrad can show max resolution 1024x512 @ 25Hz. (or 1072x480).

Real resolution of the TV monitor is 1366 × 768 (HD Ready). TV monitor recognized Amstrad's modificated FRAME as 720x480 @30Hz. Maybe interpolated/rescaling, maybe no... :-)
A Miracle that it works. ;)

ps. I always must found typical acpect ratio of FRAME in standard VESA. Other way I must found other Monitor, but I have not it.
CPC 6128, Whole 6128 and Only 6128

McArti0

#10
My TV not recognized standard Amstrad's Frame by VGA connector, BUT .... swith ON Interlace Sync Raster Scan Mode.

OUT &BC00,8 : OUT &BD00,1 and WORK !
CPC 6128, Whole 6128 and Only 6128

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