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TonyChatfield / S1-RX8-AC-Display-controller

Arduino based AC-Display control for S1 RX8
MIT License
16 stars 8 forks source link

Wiki addition: LCD Display Function page #2

Closed basilhussain closed 6 years ago

basilhussain commented 6 years ago

When looking through the list of icons, where MKRAM addresses are mapped to LCD symbols, I was curious to note that there were two symbols that have been omitted: the prime (′) and double-prime (″) marks on the right-hand side of the central character area. The former between characters 10 & 11, and the latter after character 12. Presumably they are used to designate minutes and seconds.

Experimentation revealed that they are both controlled by the same bit in the register at MKRAM address 0x9B, offset 0x04. That is, toggling this bit turns them both on/off at the same time - they cannot be controlled separately.

So, the wiki page's icons table should be updated to read as follows:

Icon9B; not used, fan7, min/sec prime marks, R/H vertical divider, Full Stop between DDRAM #11 & #12

(Or substitute with however you feel they should be described.)

I don't actually recall whether or not the RX-8's display output ever actually uses these symbols - I would imagine if so perhaps for CD audio track time elapsed? - but they are there and can be utilised nonetheless. :)

TonyChatfield commented 6 years ago

Good find, it seems I did have these flagged in my initial tests but they were dropped at some point possibly as I needed glasses and just couldn't see them again or I may have been undecided about them sharing the one register. Makes perfect sense to have them tied together as part of a 'time' display.