Programmable Array Logic (PAL). Not to be confused with PAL, the colour encoding system for analog televisions.
The CPC6128 second page of 64KB RAM is controlled by a PAL 16L8 chip. It has the Amstrad part number 40031.
On the CPC 6128 schematic, it is top centre: [http://www.cpcwiki.eu/imgs/4/4a/CPC6128_Schematic.png CPC6128 Schematic] however the X inputs aren't distinguished.
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== IC Models used in CPC ==
These are the ones known to be used in the CPC by looking at pictures of CPC mainboards:
* HAL16L8ACN [https://www.cpcwiki.eu/imgs/6/67/CPC6128_PCB_Top_%28Z70290_MC0020F%29.jpg Source]
* PAL16L8ACN [https://www.cpcwiki.eu/imgs/4/4e/CPC6128_PCB_Top_%28Z70290_MC0020G%29.jpg Source]
They both wear the same Amstrad part number 40031.
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