This chip was never used by Amstrad. However, some CPC enthusiasts have replaced the original CRTC chip in their CPC with this one. [https://www.youtube.com/watch?v=bCTf3DWFVc4 Split-screen functionality demoed in BASIC]
This is the cheapest way to upgrade the CPC's graphics capabilities, costing only 1.29€. [https://thecheshirec.at/2024/05/19/des-crtc5-a-129e/ Source]
<br>