collapseos/blk/555
Virgil Dupras 2f1e635b9d ti84: tidy up driver code
Pushed all words directly interfacing with ports and memory offsets to
low level layers. This saves us the need for keeping those variables in
runtime memory.
2020-05-09 08:50:55 -04:00

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( Required config: LCD_MEM )
: _mem+ [ LCD_MEM LITN ] @ + ;
: FNTW 3 ; : FNTH 5 ;
( Wait until the lcd is ready to receive a command. It's a bit
weird to implement a waiting routine in asm, but the forth
version is a bit heavy and we don't want to wait longer than
we have to. )
CODE _wait
BEGIN,
0x10 ( CMD ) INAn,
RLA, ( When 7th bit is clr, we can send a new cmd )
JRC, AGAIN,
;CODE