== Aleste Gate Array (aka Patasonic's Multiport) ==
3. Aleste "Gate Array" is similar in functionality to the Gate-Array in the CPC/Plus.
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|''bit 7''||''bit 6''||Action
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|0||0||Gate Array Register 0 - Pen index write (note 5)
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|0||1||Gate Array Register 1 - Pen ink write (note 6)
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|1||0||Gate Array Register 2 - Mode, Rom enable, Leds (note 7)
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|1||1||Gate Array Register 3 - Used by mapper
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=== Gate Array Register 0 ===
5. Pen index:
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|''bit''||Action
=== Gate Array Register 1 ===
6. The number is converted by IC D62.
* When MAPPER is set in EXTPORT, then the numbers effectively define a R,G,B colour with 2 bits per element, but the rom then changes the order of the bits before it gets to the hardware.
=== Gate Array Register 2 ===
7.
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|''bit''||Action