blk/551

@@ -1,7 +1,7 @@
 TI-84+ LCD driver
 
-Implement (emit) on TI-84+ (for now)'s LCD screen. The low
+Implement (emit) on TI-84+ (for now)'s LCD screen. Load with
-level part are blocks 555-557 and high level ones are 558-560.
+"555 LOAD".
 
 The screen is 96x64 pixels. The 64 rows are addressed directly
 with CMD_ROW but columns are addressed in chunks of 6 or 8 bits

blk/552

@@ -12,5 +12,5 @@ that line will go up 8 pixels, wrapping itself to the bottom of
 the screen.
 
 The principle is this: The active line is always the bottom
-one. Therefore, when active row is 0, Z is FNTH+1, when row is
+one. Therefore, when active row is 0, Z is FNT_HEIGHT+1, when
-1, Z is (FNTH+1)*2, When row is 8, Z is 0.              (cont.)
+row is 1, Z is (FNT_HEIGHT+1)*2, When row is 8, Z is 0. (cont.)

blk/553

@@ -8,9 +8,9 @@ only 16 characters per line, which is hardly usable.
 
 This is why we have this buffering system. How it works is that
 we're always in 8-bit mode and we hold the whole area (8 pixels
-wide by FNTH high) in memory. When we want to put a glyph to
+wide by FNT_HEIGHT high) in memory. When we want to put a glyph
-screen, we first read the contents of that area, then add our
+to screen, we first read the contents of that area, then add
-new glyph, offsetted and masked, to that buffer, then push the
+our new glyph, offsetted and masked, to that buffer, then push
-buffer back to the LCD. If the glyph is split, move to the next
+the buffer back to the LCD. If the glyph is split, move to the
-area and finish the job.
+next area and finish the job.
                                                         (cont.)

blk/555

@@ -1,13 +1,15 @@
-( Required config: LCD_MEM )
+( Required config: TI_MEM )
-: _mem+ [ LCD_MEM LITN ] @ + ;
+: TI_MEM+ [ TI_MEM LITN ] @ + ;
+TI_MEM : TI_MEM [ LITN ] ;
+: LCD_PORT_CMD 0x10 ; : LCD_PORT_DATA 0x11 ;
 : 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
+CODE LCDWAIT
     BEGIN,
-        0x10 ( CMD ) INAn,
+        0x10 INAn,
         RLA, ( When 7th bit is clr, we can send a new cmd )
     JRC, AGAIN,
 ;CODE

blk/556

@@ -1,13 +1,8 @@
 ( Current Y position on the LCD, that is, where we're going to
   spit our next glyph. )
-: LCD_CURY 0 _mem+ ;
+: LCD_CURY 0 TI_MEM+ ;
-: LCD_CURX 1 _mem+ ;
+: LCD_CURX 1 TI_MEM+ ;
-( two pixel buffers that are 8 pixels wide (1b) by FNTH
+( two pixel buffers that are 8 pixels wide (1b) by FNT_HEIGHT
   pixels high. This is where we compose our resulting pixels
   blocks when spitting a glyph. )
-: LCD_BUF 2 _mem+ ;
+: LCD_BUF 2 TI_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 ;

blk/557

@@ -1,9 +1,12 @@
+: _cmd LCD_PORT_CMD PC! LCDWAIT ;
+: _data! LCD_PORT_DATA PC! LCDWAIT ;
+: _data@ LCD_PORT_DATA PC@ LCDWAIT ;
+: LCDOFF 0x02 ( CMD_DISABLE ) _cmd ;
+: LCDON 0x03 ( CMD_ENABLE ) _cmd ;
 : _yinc 0x07 _cmd ; : _xinc 0x05 _cmd ;
-: _zoff! ( off -- ) 0x40 + _cmd ;
+: _col! ( col -- ) 0x20 ( CMD_COL ) + _cmd ;
-: _col! ( col -- ) 0x20 + _cmd ;
+: _row! ( row -- ) 0x80 ( CMD_ROW ) + _cmd ;
-: _row! ( row -- ) 0x80 + _cmd ;
 : LCD$
-    H@ [ LCD_MEM LITN ] ! FNTH 2 * 2+ ALLOT
+    H@ TI_MEM ! FNTH 2 * 2+ ALLOT
     LCDON 0x01 ( 8-bit mode ) _cmd
-    FNTH 1+ _zoff!
 ;

blk/558

@@ -10,5 +10,4 @@
 ( Changes the current line and go back to leftmost column )
 : _lf
     LCD_CURY C@ FNTH 1+ + DUP 63 > IF DROP 0 THEN
-    DUP _clrln DUP FNTH 1+ _zoff!
+    DUP _clrln LCD_CURY C! 0 LCD_CURX C! ;
-    LCD_CURY C! 0 LCD_CURX C! ;

recipes/ti84/xcomp.fs

@@ -1,6 +1,6 @@
 0x8000 CONSTANT RAMSTART
 0xb000 CONSTANT RS_ADDR
-RAMSTART 0x70 + CONSTANT LCD_MEM
+RAMSTART 0x70 + CONSTANT TI_MEM
 212 LOAD  ( z80 assembler )
 262 LOAD  ( xcomp )
 522 LOAD  ( font compiler )
@@ -12,15 +12,15 @@ RAMSTART 0x70 + CONSTANT LCD_MEM
 CURRENT @ XCURRENT !
 
 282 LOAD  ( boot.z80 )
+555 LOAD  ( ti.z80 )
 393 LOAD  ( icore low )
-555 557 LOADR ( ti low )
 415 LOAD  ( icore high )
 (entry) ~FNT CPFNT3x5
 (entry) _
 ( Update LATEST )
 PC ORG @ 8 + !
 422 437 XPACKR ( core )
-558 560 XPACKR ( ti high )
+556 560 XPACKR ( ti )
 438 446 XPACKR ( print fmt )
 ," : _ LCD$ LIT< Hello (print) LIT< World! (print) BYE ; _ "
 ORG @ 256 /MOD 2 PC! 2 PC!