collapseos/blk/556
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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( Current Y position on the LCD, that is, where we're going to
spit our next glyph. )
: LCD_CURY 0 _mem+ ;
: LCD_CURX 1 _mem+ ;
( two pixel buffers that are 8 pixels wide (1b) by FNTH
pixels high. This is where we compose our resulting pixels
blocks when spitting a glyph. )
: LCD_BUF 2 _mem+ ;
: _cmd 0x10 ( CMD ) PC! _wait ;
: _data! 0x11 ( DATA ) PC! _wait ;
: _data@ 0x11 ( DATA ) PC@ _wait ;
: LCDOFF 0x02 ( CMD_DISABLE ) _cmd ;
: LCDON 0x03 ( CMD_ENABLE ) _cmd ;