Add words RSHIFT and LSHIFT

I need RSHIFT and LSHIFT first...

blk/001

@@ -8,8 +8,8 @@ MASTER INDEX
 280 Z80 boot code             350 ACIA driver
 370 SD Card driver            390 Inner core
 420 Core words                480 AT28 Driver
-490 TRS-80 Recipe
+490 TRS-80 Recipe             520 Fonts
-
+550 TI-84+ Recipe
 
 
 

blk/054

@@ -10,7 +10,7 @@ MOD         a b -- c        a % b -> c
 AND         a b -- c        a & b -> c
 OR          a b -- c        a | b -> c
 XOR         a b -- c        a ^ b -> c
+LSHIFT      a u -- c        a << u -> c
+RSHIFT      a u -- c        a >> u -> c
 
 Shortcuts: 1+ 2+ 1- 2-
-
-

blk/215

@@ -6,7 +6,7 @@
 ( A, spits an assembled byte, A,, spits an assembled word
   Both increase PC. To debug, change C, to .X )
 : A, C, ; : A,, SPLITB A, A, ;
-: <<3 8 * ;    : <<4 16 * ;
+: <<3 3 LSHIFT ;    : <<4 4 LSHIFT ;
 ( As a general rule, IX and IY are equivalent to spitting an
   extra 0xdd / 0xfd and then spit the equivalent of HL )
 : IX 0xdd A, HL ; : IY 0xfd A, HL ;

blk/282

@@ -1 +1 @@
-1 51 LOADR+
+1 53 LOADR+

blk/334

@@ -0,0 +1,12 @@
+CODE RSHIFT ( n u -- n )
+    BC POPqq, ( u )
+    HL POPqq, ( n )
+    chkPS,
+    B C LDrr,
+    B INCr, B DECr, IFNZ,
+        BEGIN,
+            H SRLr, L RRr,
+        DJNZ, AGAIN,
+    THEN,
+    HL PUSHqq,
+;CODE

blk/335

@@ -0,0 +1,13 @@
+CODE LSHIFT ( n u -- n )
+    BC POPqq, ( u )
+    HL POPqq, ( n )
+    chkPS,
+    B C LDrr,
+    B INCr, B DECr, IFNZ,
+        BEGIN,
+            L SLAr, H RLr,
+        DJNZ, AGAIN,
+    THEN,
+    HL PUSHqq,
+;CODE
+

blk/379

@@ -9,8 +9,8 @@
 : SDCMDR7
     _sdcSel
     _cmd                 ( r )
-    _idle 256 * _idle +  ( r arg1 )
+    _idle 8 LSHIFT _idle +  ( r arg1 )
-    _idle 256 * _idle +  ( r arg1 arg2 )
+    _idle 8 LSHIFT _idle +  ( r arg1 arg2 )
     _sdcDesel
 ;
 

blk/383

@@ -10,6 +10,6 @@
         SWAP 1+          ( crc a+1 )
     LOOP
     DROP                 ( crc1 )
-    _idle 256 * _idle +  ( crc2 )
+    _idle 8 LSHIFT _idle +  ( crc2 )
     _wait DROP _sdcDesel
     = NOT IF _err THEN ;

blk/499

@@ -3,14 +3,14 @@
     ( 4 256b sectors per block, 10 sec per cyl, 40 cyl max )
     10 /MOD ( sec cyl )
     DUP 39 > IF _err THEN
-    256 * + ( cylsec )
+    8 LSHIFT + ( cylsec )
 ;
 : FD@! ( wref blk -- )
     1 @DCSTAT NOT IF _err THEN
-    4 * ( wr sec )
+    2 LSHIFT ( 4 * -- wr sec )
     4 0 DO ( wr sec )
         DUP I + _cylsec ( wr sec cs )
-        I 256 * BLK( + ( wr sec cs addr )
+        I 8 LSHIFT BLK( + ( wr sec cs addr )
         1 ROT ROT ( wr sec drv cs addr )
         4 PICK EXECUTE NOT IF _err THEN
     LOOP 2DROP ;

blk/520

@@ -0,0 +1,13 @@
+Fonts
+
+Fonts are kept in "source" form in the following blocks and
+then compiled to binary bitmasks by the following code. In
+source form, fonts are a simple sequence of '.' and 'X'. '.'
+means empty, 'X' means filled. Glyphs are entered one after the
+other, starting at 0x21 and ending at 0x7e. To be space
+efficient in blocks, we align glyphs horizontally in the blocks
+to fit as many character as we can. For example, a 5x7 font
+would mean that we would have 12x2 glyphs per block.
+
+521 Font compiler              530 3x5 font
+532 5x7 font                   536 7x7 font

blk/521

@@ -0,0 +1,6 @@
+( Converts "dot-X" fonts to binary "glyph rows". One byte for
+  each row. In a 5x7 font, each glyph thus use 7 bytes.
+  Resulting bytes are aligned to the left of the byte.
+  Therefore, for a 5-bit wide char, "X.X.X" translates to
+  0b10101000. Left-aligned bytes are easier to work with when
+  compositing glyphs. )

blk/522

@@ -0,0 +1,16 @@
+: _g ( given a top-left of dot-X in BLK(, spit 5 bin lines )
+    5 0 DO
+    0 3 0 DO ( a r )
+        2 *
+        OVER J 64 * I + + C@ 'X' = IF 1+ THEN
+    LOOP 32 * C, LOOP DROP ;
+: _l ( spit a line of u glyphs )
+    ( u ) 0 DO ( a )
+        DUP I 3 * + _g
+    LOOP DROP ;
+: CPFNT3x5
+    0 , 0 , 0 C, ( space char )
+    530 LOAD BLK( 21 _l 192 + 21 _l 192 + 21 _l ( 63 )
+    531 LOAD BLK( 21 _l 192 + 10 _l ( 94! )
+;
+

blk/530

@@ -0,0 +1,16 @@
+.X.X.XX.X.XXX...X..X...XX...X...............X.X..X.XX.XX.X.XXXX
+.X.X.XXXXXX...XX.X.X..X..X.XXX.X............XX.XXX...X..XX.XX..
+.X........XX.X..X.....X..X..X.XXX...XXX....X.X.X.X..X.XX.XXXXX.
+......XXXXX.X..X.X....X..X.X.X.X..X.......X..X.X.X.X....X..X..X
+.X....X.X.X...X.XX.....XX........X......X.X...X.XXXXXXXX...XXX.
+.XXXXXXXXXXX........X...X..XX..X..X.XX..XXXX.XXXXXX.XXX.XXXXXXX
+X....XX.XX.X.X..X..X.XXX.X...XXXXX.XX.XX..X.XX..X..X..X.X.X...X
+XXX.X.XXXXXX......X.......X.X.XXXXXXXX.X..X.XXX.XX.X.XXXX.X...X
+X.XX..X.X..X.X..X..X.XXX.X....X..X.XX.XX..X.XX..X..X.XX.X.X...X
+XXXX..XXXXX....X....X...X...X..XXX.XXX..XXXX.XXXX...XXX.XXXXXX.
+X.XX..X.XXX.XXXXX.XXXXX..XXXXXX.XX.XX.XX.XX.XXXXXXXX..XXX.X....
+XX.X..XXXX.XX.XX.XX.XX.XX...X.X.XX.XX.XX.XX.X..XX..X....XX.X...
+X..X..XXXX.XX.XXX.X.XXX..X..X.X.XX.XXXX.X..X..X.X...X...X......
+XX.X..X.XX.XX.XX..XXXX.X..X.X.X.XX.XXXXX.X.X.X..X....X..X......
+X.XXXXX.XX.XXXXX...XXX.XXX..X.XXX.X.X.XX.X.X.XXXXXX..XXXX...XXX
+!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_

blk/531

@@ -0,0 +1,11 @@
+X.....X.......X....XX...X...X...XX..XX.......................X.
+.X.XX.X...XX..X.X.X...X.X........X.X.X.X.XXX..X.XX..XX.XX.XXXXX
+.....XXX.X...XXX.XXX.X.XXX..X...XXX..X.XXXX.XX.XX.XX.XX..XX..X.
+...XXXX.XX..X.XXX.X...XXX.X.X...XX.X.X.X.XX.XX.XXX..XXX....X.X.
+...XXXXX..XX.XX.XXX..XX.X.X.X.XX.X.X.XXX.XX.X.X.X....XX..XX..XX
+...................XX.X.XX.....................................
+X.XX.XX.XX.XX.XXXX.X..X..X..XX
+X.XX.XX.X.X..X..XXX...X...XXX.
+X.XX.XXXX.X..X.XX..X..X..X....
+XXX.X.X.XX.X.X.XXX.XX.X.XX....
+`abcdefghijklmnopqrstuvwxyz{|}~

blk/532

@@ -0,0 +1,17 @@
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+
+

blk/550

@@ -0,0 +1,6 @@
+TI-84+ Recipe
+
+Support code for the TI-84+ recipe. Contains drivers for the
+keyboard and LCD.
+
+551 LCD

blk/551

@@ -0,0 +1,16 @@
+TI-84+ LCD driver
+
+Implement (emit) on TI-84+ (for now)'s LCD screen. Load with
+"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
+(there are two modes).
+
+In 6-bit mode, there are 16 visible columns. In 8-bit mode,
+there are 12.
+
+Note that "X-increment" and "Y-increment" work in the opposite
+way than what most people expect. Y moves left and right, X
+moves up and down.
+                                                        (cont.)

blk/552

@@ -0,0 +1,16 @@
+# Z-Offset
+
+This LCD has a "Z-Offset" parameter, allowing to offset rows on
+the screen however we wish. This is handy because it allows us
+to scroll more efficiently. Instead of having to copy the LCD
+ram around at each linefeed (or instead of having to maintain
+an in-memory buffer), we can use this feature.
+
+The Z-Offet goes upwards, with wrapping. For example, if we
+have an 8 pixels high line at row 0 and if our offset is 8,
+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 FNT_HEIGHT+1, when
+row is 1, Z is (FNT_HEIGHT+1)*2, When row is 8, Z is 0. (cont.)

blk/553

@@ -0,0 +1,16 @@
+# 6/8 bit columns and smaller fonts
+
+If your glyphs, including padding, are 6 or 8 pixels wide,
+you're in luck because pushing them to the LCD can be done in a
+very efficient manner.  Unfortunately, this makes the LCD
+unsuitable for a Collapse OS shell: 6 pixels per glyph gives us
+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 FNT_HEIGHT high) in memory. When we want to put a glyph
+to screen, we first read the contents of that area, then add
+our new glyph, offsetted and masked, to that buffer, then push
+the buffer back to the LCD. If the glyph is split, move to the
+next area and finish the job.
+                                                        (cont.)

blk/554

@@ -0,0 +1,3 @@
+That being said, it's important to define clearly what CURX and
+CURY variable mean. Those variable keep track of the current
+position *in pixels*, in both axes.

blk/555

@@ -0,0 +1,16 @@
+( Required config: TI_MEM )
+: TI_MEM+ [ TI_MEM LITN ] + ;
+: LCD_PORT_CMD 0x10 ;
+: LCD_PORT_DATA 0x11 ;
+: FNT_WIDTH 3 ;
+: FNT_HEIGHT 5 ;
+( Current Y position on the LCD, that is, where we're going to
+  spit our next glyph. )
+: LCD_CURY 0 TI_MEM+ ;
+: LCD_CURX 1 TI_MEM+ ;
+( 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 TI_MEM+ ;
+
+1 2 LOADR+

blk/556

@@ -0,0 +1,11 @@
+: _wait ( Wait until the lcd is ready to receive a command )
+	( When 7th bit is cleared, we can send a new command )
+    BEGIN LCD_PORT_CMD PC@ 0x80 AND NOT UNTIL ;
+: _cmd LCD_PORT_CMD PC! _wait ;
+: _data! LCD_PORT_DATA PC! _wait ;
+: _data@ LCD_PORT_DATA PC@ _wait ;
+: LCDOFF 0x02 ( CMD_DISABLE ) _cmd ;
+: _col! ( col -- )
+    0x20 ( CMD_COL ) + _cmd ;
+: _row! ( row -- )
+    0x80 ( CMD_ROW ) + _cmd ;

blk/557

@@ -0,0 +1,3 @@
+( Load a "glyph line" from buffer, left part being in MSB and
+  right part being in LSB. )
+: _gl@

blk/558

@@ -0,0 +1,5 @@
+: _glyph> ( a -- )
+    LCD_CURY C@ _row! LCD_CURX C@ 8 /MOD _col! ( a coff )
+    0x05 ( XINC ) _cmd _data@ DROP
+    FNT_HEIGHT 0 DO LOOP
+