|}
A known example for a perfectly working monitor is the BENQ 702A. More examples can be found on the internet (see links below), but be aware, although the [https://pinoutguide.com/Video/VGAVesaDdc_pinout.shtml VGA standard should accept Csync on pin 13], some monitors expect separate v-sync and h-sync signals. In those cases, [[Connecting the CPC to a VGA monitor - CPC2VGA|an adapter, that splits c-sync into h-sync and v-sync (CPC2VGA)]] would be required.
=== Converter options ===
==== SCART to HDMI converters ====
tldr; DON'T. USE. THEM. SCART to HDMI converters are the cheapest and most simple solution. Make sure they (really) support RGB and not only composite video, like the cheapest SCART to HDMI converters usually do. RGB SCART converters start at around 30€ (2022). They will usually work and you will probably first think, that this is perfect, but they usually can add a hefty lag to your screen, easily some add up to 120ms (or 6 frames).
[[File:ModernLCD Scart2HDMI.JPG|thumbnail|none|Typical Scart2HDMI box]]
This Youtube video explains in detail why you should [https://youtu.be/7VOsOuQ5mhM?t=587 Avoid avoid Scart to HDMI converters for retro gaming]. It's fine if you only want to do a bit of BASIC programming or play adventures, but it's not good for could do some harm to fast action games.
==== Scan converters ====
See [https://github.com/ramapcsx2/gbs-control GBS Control for GBS8200] and [https://github.com/ramapcsx2/gbs-control/issues/165 VC9900]
Especially the GBS8200 is easily available and incredibly cheap and if you know how to solder, the GBS Control mod is easy to do. And that's of course also the downside: you need to solder - and probably also 3D print a case for the GBS. Update: Some sellers have adopted the GBS Control firmware and offer full products based on the GBS 8200 chipsets and the GBS Control mod. The price is a bit more than building one yourself - but still A LOT cheaper than any other (good) scaler solution. On the positive side it also already includes a case and HDMI output. Offers can be found e.g. on Amazon or AliExpress. Search for "GBS Control". No test has been docuemted so far with a CPC, so there's still a risk that the hardware behaves differently from a self-built GBS mod.
===== RGB2HDMI =====
[https://www.youtube.com/watch?v=2CnsQBGAuos The new star on the horizon.] An open source project, that combines a Raspberry Pi with some custom logic, to convert signals from home computers and home consoles to HDMI. For almost every computer there is a more or less different version of the board. You can build the RGB2HDMI yourself or buy a finished version, e.g. on sellmyretro.com . It's features are even beyond those of the OSSC and Framemeister. Its total price is somewhere between the GBS and the OSSC, depending on where you buy it. And its tiny. Its biggest disadvantage is, that you need a different version of the board per console or home computer (well - some computers share a similar signal, so e.g. for the BBC you can also use the CPC version, but e.g. an Amiga or an Amstrad Plus each need another converter version). Screen lag has not been measured yet for it, but it seems to be very low.
===== vga4cpc =====
This DIY project by forum user gregg is based on the Raspberry Pico and (as of November 2024) the only solution that supports most (all?) CRTC tricks. Even games like Relentless that do not render properly on any of the other scan doublers are perfectly playable and absolutely smooth. Hardware and software are publicly available and the scan doubler can be built for less than €30 (€10-€30, depending on shipping costs for the parts). Assembly should be doable for anyone with average soldering skills.
Githup project: https://github.com/grzegorz-gr/vga4cpc
Forum thread: https://www.cpcwiki.eu/forum/amstrad-cpc-hardware/vga-through-rpi-pico-how-many-colors-possible-on-border/
The only downside would be that it only supports the Amstrad CPC, so if you own other computers (or even a Amstrad Plus or GX4000), you still need another solution.
{|
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| [[File:Vga4cpc.jpg|thumbnail]] || [[File:Picovgacase.jpg|thumbnail]]
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* [https://github.com/ramapcsx2/gbs-control GBS Control for GBS8200]
* [https://www.youtube.com/watch?v=7VOsOuQ5mhM Screen Lag - explanation and comparison video]
* [http://15khz.wikidot.com/ List of 15KHz 15kHz compatible monitors]* https://15khz.net/ similar list
[[Category:Hardware]] [[Category:Peripherals]] [[Category:DIY]][[Category:Graphic]]