Presentation slides with demo

move sprites + tiles to far memory to free up space

.gitignore

@@ -4,4 +4,4 @@
 *.swp
 *.log
 *.jim
-
+game.map

egamap.h

@@ -1,6 +1,6 @@
 #include "tiles.h"
 
-#define NUM_TILES 128
+#define NUM_TILES 64
 #define NUM_PORTRAITS 16
 
 #define SIZE_FOOTER (PAGE_STRIDE * 48)

game.jor

@@ -112,9 +112,6 @@ player :tick
 ;entity
 
 ( S T U F F )
-: hello-world
-  player.state DRIVING fnot! ;
-
 : reset-level
   :| player yield 0 |; ' entities redefine
   :| drop drop 0 |; ' player-touch redefine ;
@@ -122,9 +119,6 @@ player :tick
 : mode-move
   entities each EVTICK entity>do more
   tick-mapedit
-  ^SPACE key-pressed if
-    ' hello-world JOB send
-  then
   tick-debounce
   q-level @ dup if
     0 q-level !
@@ -141,13 +135,17 @@ player :tick
   r@ entity.dir @ r< entity>sprite
   draw-sprite ;
 
+var showmouse
+1 showmouse !
 : full-draw
   player entity.x @ 152 -
   player entity.y @ 92 -
   scroll
 
   entities each draw-entity more
-  mouseworldpos 4 draw-sprite
+  showmouse @ if
+    mouseworldpos 4 draw-sprite
+  then
   draw-screen
   draw-footer ;
 

gameboot.jor

@@ -1,7 +1,11 @@
 : blah ' seremit task-emit ! ;
 blah
 
-: start-repl activate blah
+s" game.log" open seekend fdeactivate const LOGFILE
+: emit-log fdeactivate LOGFILE factivate fputc fdeactivate drop factivate ;
+: atexit LOGFILE factivate close ;
+
+: start-repl activate blah ' emit-log task-echo !
   s" .:: J O R T H ( jean forth) ::." type cr
   begin receive loadstring s" ok" type cr again ;
 task const REPL
@@ -19,6 +23,7 @@ s" footer.jor" loadfile
 s" map.jor" loadfile
 s" game.jor" loadfile
 s" state.jor" loadfile
+s" slide.jor" loadfile
 ; execute
 
 intern pete.jor
@@ -30,4 +35,4 @@ intern trail1.jor
 :noname loadfile ; checkpoint _loadlevel
 ' _loadlevel ' loadlevel redefine
 
-pete.jor loadlevel
+( pete.jor loadlevel )

jopl.jor

@@ -228,6 +228,7 @@ var t2
 : ontick startt2 player status trackstatus ;
 
 : files findfile begin dup while yield findnext repeat ;
+: .files files each type s"  " type more ;
 
 : keynote [ inline|
 44 b, 31 b, 45 b, 32 b, 46 b, 47 b, 34 b, 48 b, 35 b, 49 b, 36 b, 50 b,

jorth.c

@@ -342,6 +342,10 @@ void f_fputc() {
   DROP(1);
 }
 
+void f_gets() {
+  gets(TOP().s);
+}
+
 void f_fput() {
   if (ACTIVE_FILE) {
     fwrite(&TOP().u, 2, 1, ACTIVE_FILE);
@@ -747,6 +751,12 @@ void f_tell() {
   PUSHU(ftell(ACTIVE_FILE));
 }
 
+void f_exists() {
+  struct stat statbuf;
+  int rc = stat(TOP().s, &statbuf);
+  TOP().i = rc == 0;
+}
+
 void f_swapinput() {
   cell *key = RUNNING + TASK_USER_KEY;
   cell *keysrc = RUNNING + TASK_USER_KEYSRC;
@@ -1111,6 +1121,7 @@ void f_init(char *exe) {
   CDEF("swap-input", f_swapinput);
   CDEF("putc", f_putc);
   CDEF("fputc", f_fputc);
+  CDEF("gets", f_gets);
   CDEF("number", f_number);
   CDEF("LIT_", f_lit_);
   CDEF("GOTO_", f_goto_);
@@ -1127,6 +1138,7 @@ void f_init(char *exe) {
   CDEF("open", f_open);
   CDEF("overwrite", f_overwrite);
   CDEF("close", f_close);
+  CDEF("exists", f_exists);
   CDEF("factivate", f_activate);
   CDEF("fdeactivate", f_deactivate);
   CDEF("seek", f_seek);

serial.c

@@ -85,3 +85,25 @@ void ser_write(char *str) {
     ser_write_byte(*str);
   }
 }
+
+int ser_getline(char *line) {
+  int i = strlen(line);
+  int value;
+  for (value = ser_poll(); value != SER_NODATA; value = ser_poll()) {
+    if (value == '\b' || value == 127) {
+      i --;
+    } else {
+      line[i] = value;
+      i ++;
+    }
+    line[i] = '\0';
+    ser_write_byte(value); // echo
+
+    if (value == '\r') {
+      line[i - 1] = '\n';
+      ser_write_byte('\n');
+      return 1;
+    }
+  }
+  return 0;
+}

serial.h

@@ -19,10 +19,11 @@
 #define BAUD_57600  0x0002
 #define BAUD_115200 0x0001
 
-#define SER_READ_BUFFER_SIZE 0x200
+#define SER_READ_BUFFER_SIZE 64
 #define SER_NODATA -1
 
 void ser_init(int port, int baudrate, int protocol);
 int ser_poll();
 void ser_write_byte(char byte);
 void ser_write(char *str);
+int ser_getline(char *line);

slide.c

@@ -0,0 +1,82 @@
+#include <graphics.h>
+#include "jorth.h"
+
+static int bgi_on = 0;
+void bgi_shutdown() {
+  if (bgi_on) {
+    closegraph();
+    bgi_on = 0;
+  }
+}
+
+void bgi_init() {
+  int driver = VGA;
+  int mode = VGAHI;
+  if (!bgi_on) {
+    initgraph(&driver, &mode, NULL);
+    bgi_on = 1;
+  }
+}
+
+void s_outtext() {
+  outtext(TOP().s);
+  DROP(1);
+}
+
+void s_justify() {
+  settextjustify(TOP().i, TOP_TEXT);
+  DROP(1);
+}
+
+void s_font() {
+  struct textsettingstype settings;
+  gettextsettings(&settings);
+  settextstyle(ST1().i, settings.direction, TOP().i);
+  DROP(2);
+}
+
+void s_direction() {
+  struct textsettingstype settings;
+  gettextsettings(&settings);
+  settextstyle(settings.font, TOP().i, settings.charsize);
+  DROP(1);
+}
+
+void s_moveto() {
+  moveto(ST1().i, TOP().i);
+  DROP(2);
+}
+
+void s_pos() {
+  PUSHI(getx());
+  PUSHI(gety());
+}
+
+void s_setcolor() {
+  setcolor(TOP().i);
+  DROP(1);
+}
+
+void s_setbgcolor() {
+  setbkcolor(TOP().i);
+  DROP(1);
+}
+
+void s_clear() {
+  cleardevice();
+}
+
+void slide_init() {
+  CDEF("bgi-on", bgi_init);
+  CDEF("bgi-off", bgi_shutdown);
+  CDEF("outtext", s_outtext);
+  CDEF("justify", s_justify);
+  CDEF("font", s_font);
+  CDEF("direction", s_direction);
+  CDEF("moveto", s_moveto);
+  CDEF("pos", s_pos);
+  CDEF("color!", s_setcolor);
+  CDEF("bg!", s_setbgcolor);
+  CDEF("wipe", s_clear);
+  atexit(bgi_shutdown);
+}

slide.h

@@ -0,0 +1 @@
+void slide_init();

slide.jor

@@ -0,0 +1,181 @@
+( K E Y B O A R D )
+57 const ^SPACE
+75 const ^LEFT
+77 const ^RIGHT
+51 const ^<
+52 const ^>
+31 const ^S
+59 const ^F1
+
+0 const BLACK
+1 const BLUE
+2 const GREEN
+3 const CYAN
+4 const RED
+5 const MAGENTA
+6 const BROWN
+7 const LGRAY
+8 const DGRAY
+9 const LBLUE
+10 const LGREEN
+11 const LCYAN
+12 const PINK
+13 const LMAGENTA
+14 const YELLOW
+15 const WHITE
+
+: rungame
+  0 player.state DRIVING f!
+  1 showmouse !
+  [ MODE-MOVE @ lit ] dup MODE-MOVE ! ' tick redefine
+  ' full-draw ' draw redefine
+  12 11 tile>world player entity.pos!
+  bgi-off 320x200 loadportraits
+  s" pete.jor" loadfile
+  begin suspend again ;
+
+( S L I D E )
+var skip
+var autoslide
+: pause
+  skip @ not if
+    begin
+      suspend 0
+      ^< key-pressed if drop 1 1 skip ! -1 autoslide ! then
+      ^> key-pressed if drop 1 1 skip ! 1 autoslide ! then
+      ^S key-pressed if drop 1 1 skip ! then
+      ^RIGHT key-pressed ^SPACE key-pressed or if drop 1 then
+      ^F1 key-pressed if rungame then
+    until
+  then ;
+
+defer write
+: y pos swap drop ;
+: nexty ( dy -- y ) y + ;
+: writeline ( s x dy ) nexty <rot outtext moveto ;
+
+: header :| 320 50 writeline |; ' write redefine
+    wipe BLUE bg! 1 5 font 1 justify WHITE color! 320 10 moveto ;
+
+: bullet :| 30 30 writeline |; ' write redefine
+    3 3 font 0 justify LCYAN color! 30 y 30 + moveto ;
+
+: goof :| 320 60 writeline |; ' write redefine
+    wipe 4 7 font 1 justify CYAN color! 320 100 moveto ;
+
+( S L I D E S )
+
+' noop
+:noname 12 11 tile>world player entity.pos!
+	s" pete.jor" loadfile ;
+:noname :| player yield 0 |; ' entities redefine
+	0 player.state DRIVING f!
+	1 showmouse ! MODE-MOVE @ ' tick redefine
+	12 11 tile>world player entity.pos!
+	loadportraits ;
+:noname s" hide-footer" REPL send ;
+:noname s" show-footer" REPL send ;
+:noname :| player yield 0 |; ' entities redefine
+	1 player.state DRIVING f! E player entity.dir ! ;
+:noname :| 0 |; ' entities redefine 0 showmouse ! ;
+array demostates , , , , , , ,
+var demostate
+
+: enterdemostate
+  demostate @ cells demostates + @ execute ;
+
+: tick-nextslide
+  ^SPACE key-pressed if 1 demostate +! enterdemostate then ;
+
+: demotick
+  tick-nextslide
+  0 ^LEFT key-down if 3 - then
+    ^RIGHT key-down if 3 + then
+  0 ^UP key-down if 3 - then
+    ^DOWN key-down if 3 + then
+  player entity.y +!
+  player entity.x +!
+  tick-mapedit
+  tick-debounce ;
+
+: autoadvance autoslide @ not if 1 autoslide ! then ;
+: demo ( endstate startstate -- )
+  bgi-off 320x200
+  ' full-draw ' draw redefine
+  ' demotick ' tick redefine
+  demostate ! enterdemostate
+  begin suspend dup demostate @ <= until drop
+  ' noop ' draw redefine
+  ' noop ' tick redefine
+  bgi-on autoadvance ;
+
+var demorepldone
+: quit 1 demorepldone ! ;
+: start-demorepl activate ' putc task-emit !
+  s" .:: J O R T H ( jean forth) ::." type cr
+  begin receive loadstring s" ok" type cr again ;
+task const DEMOREPL
+array replbuf 256 allot
+
+: demorepl
+  bgi-off key-end 0 demorepldone !
+  DEMOREPL start-demorepl suspend
+  begin replbuf gets DEMOREPL send suspend
+  demorepldone @ until
+  bgi-on key-start autoadvance ;
+
+array filenamebuf 13 allot
+var filenameindex
+: store-fn-char filenamebuf filenameindex @ + b! ;
+: filename-emit
+  dup [ key   lit ] != if
+    store-fn-char
+    1 filenameindex +!
+    0 store-fn-char
+  else drop then ;
+
+: slidefilename ( i -- s )
+  task-emit @
+    ' filename-emit task-emit !
+    0 filenameindex !
+    s" slide" type
+    swap .
+    s" .jor" type
+  task-emit !
+  filenamebuf ;
+
+var slidecount
+var slideindex
+
+: skipto ( i -- )
+  slideindex @ - autoslide ! 1 skip ! ;
+
+: fixindex
+  slideindex @ 0 < if slidecount @ 1 - slideindex ! else
+  slideindex @ slidecount @ >= if 0 slideindex ! then then ;
+
+: show ( i -- ) 0 skip ! 0 autoslide ! slidefilename loadjor ;
+: nextslide
+  autoslide @ if
+    autoslide @ slideindex +!
+  else
+    begin
+      suspend
+      ^LEFT key-pressed ^< key-pressed or
+	if -1 else
+      ^RIGHT key-pressed ^SPACE key-pressed or ^> key-pressed or
+	if 1 else 0 then then
+      dup if dup slideindex +! then
+    until
+  then fixindex ;
+
+: slideshow activate blah
+  bgi-on ' noop ' draw redefine ' noop ' tick redefine
+  begin slideindex @ show nextslide again ;
+task const SLIDESHOW
+SLIDESHOW slideshow
+
+:noname
+  0 begin dup slidefilename exists while 1 + repeat slidecount !
+  :| tick-nextslide [ MODE-MOVE @ , ] |; MODE-MOVE !
+; ' onload redefine

slide0.jor

@@ -0,0 +1,8 @@
+MAGENTA bg!
+goof
+s" What A 30-Year" write
+s" Old PC Can Teach" write
+s" Us About Graphic" write
+s" Design" write pause
+BLUE bg! bullet
+s" (just kidding)" write

slide1.jor

@@ -0,0 +1,4 @@
+header 320 180 moveto
+s" Building Your Own Tools" write pause
+bullet
+s" Or, Be Moore Like Chuck" write

slide10.jor

@@ -0,0 +1,16 @@
+header
+s" Things Jorth is missing" write pause
+bullet
+s" * Garbage collection" write pause
+s" * Dynamic memory allocation" write pause
+s" * Garbage" write pause
+s" * Memory safety" write pause
+s" * Error reporting" write pause
+s" * Static types" write pause
+s" * Dynamic types" write pause
+s" * Objects" write pause
+s" * Polymorphic methods" write pause
+s" * Closures" write pause
+s" * Flow control (in the interpreter)" write pause
+s" * Local variables" write pause
+s" * Syntax" write

slide11.jor

@@ -0,0 +1,10 @@
+header
+s" Things Jorth has" write
+bullet
+s" * An interactive embedded REPL" write pause
+s" * Lightweight co-operative multitasking" write pause
+s" * A C FFI" write pause
+s" * An extensible compiler, defined in itself" write pause
+s" * The ability to fit comfortably in 16kb of RAM" write pause
+s" * An entire codebase I completely understand" write
+s"   and am willing to change to fit my problem" write

slide12.jor

@@ -0,0 +1,15 @@
+header
+s" Jorth Crash Course" write
+s" Syntax & Semantics" write
+bullet
+s" * Read text until a space is encountered" write pause
+s" * Look up word in dictionary" write pause
+s" * If a definition is found: Execute it" write pause
+s" * Otherwise: Parse it as a number" write pause
+s" * Otherwise: Give up" write pause
+s" * Postfix / Reverse Polish Notation" write
+s"   parameters and return values live on The Stack" write pause
+s" * D E M O !" write pause
+demorepl
+
+

slide13.jor

@@ -0,0 +1,9 @@
+header
+s" Jorth Crash Course" write
+s" The Jorth Virtual Machine" write
+bullet
+s" while (IP.p) {" write
+s"  W = *IP.p;" write
+s"  IP.p++;" write
+s"  W.p->f();" write
+s" }" write

slide14.jor

@@ -0,0 +1,11 @@
+header
+s" Jorth Crash Course" write
+s" Calling Conventions" write
+bullet
+s" void f_docolon() {" write
+s"   RPUSH(IP);" write
+s"   IP.p = W.p + 1;" write
+s" }" write pause
+s" void f_ret() { " write
+s"   IP = *RPOP();" write
+s" }" write

slide15.jor

@@ -0,0 +1,14 @@
+header
+s" Jorth Crash Course" write
+s" Writing Jorth In Itself" write
+bullet
+s" : begin here ; immediate" write
+s" : until ' BZ_ , , ; immediate" write pause
+s" " write
+s" : if ' BZ_ , here 0 , ; immediate" write
+s" : then here swap ! ; immediate" write pause
+s" " write
+s" : ( begin key ')' = until ; immediate" write
+
+
+

slide16.jor

@@ -0,0 +1,8 @@
+header
+s" What Good Was It?" write
+bullet
+s" * Jorth soon spread to every part of the project" write pause
+s" * C for the hardware, Jorth for everything else" write pause
+s" * All game & drawing logic" write pause
+s" * Map editing" write pause
+6 4 demo

slide17.jor

@@ -0,0 +1,9 @@
+header
+s" Entirely Intuitive Results" write
+bullet
+s" * Forth does not scale up" write pause
+s" * Arranging postfix expressions without local" write
+s"   variables is hard" write pause
+s" * It's too easy to fill 64kb of memory" write pause
+s" * This would have been impossible without" write
+s"   the internet" write

slide18.jor

@@ -0,0 +1,16 @@
+header
+s" Counterintuitive Results" write
+bullet
+s" * Complicated Forth code is AWFUL..." write pause
+s"   ... which is a powerful force for simplicity" write pause
+s" * Virtually ALL state is global..." write pause
+s"   ... which makes it all visible when debugging" write pause
+s"   ... and which lets code stay small and focussed" write pause
+s" * Hard to tell what a word might do..." write pause
+s"   ... but this makes huge implementation" write
+s"       changes possible!" write pause
+s" * The most flexible abstraction may be the tiniest" write pause
+s" * It's easier to write my own!" write pause
+s"   * Map editor" write pause
+s"   * Music livecoding REPL (<300 LOC!)" write pause
+s"   * This presentation software (<200 LOC!)" write

slide19.jor

@@ -0,0 +1,4 @@
+header
+s" I should shut up now" write pause
+goof CYAN bg! MAGENTA color!
+s" Questions?" write

slide2.jor

@@ -0,0 +1,6 @@
+header
+s" Background" write
+bullet
+s" I decided to write a game" write pause
+s" for a 30-year-old computer" write pause
+s" on a 30-year-old computer" write

slide3.jor

@@ -0,0 +1,6 @@
+header
+s" WHY?!" write pause
+bullet
+s" * I fell in love with MS-DOS" write pause
+s" * I wanted to see if I could" write pause
+s" * Learning is fun" write

slide4.jor

@@ -0,0 +1,30 @@
+header
+s" What were my restrictions?" write
+bullet
+s" * Turbo C++ 1.0 (C & assembler)" write pause
+s" * 16-bit real-mode x86" write pause
+pos    s"   * 640kb of RAM" write pause
+moveto s"     -----" write
+pos    s"   * ~550-600kb of RAM" write pause
+moveto s"     ----------" write
+       s"   * 64kb of code, 64kb of data," write
+       s"     256kb of video memory" write pause
+	s" * E" outtext
+2 color!  s" G" outtext
+3 color!  s" A " outtext
+4 color!  s" G" outtext
+5 color!  s" r" outtext
+6 color!  s" a" outtext
+7 color!  s" p" outtext
+8 color!  s" h" outtext
+9 color!  s" i" outtext
+10 color! s" c" outtext
+11 color! s" s" outtext
+12 color! s" !" outtext
+13 color! s" !" outtext
+14 color! s" !" write
+LCYAN color!
+s"   * 320x200 pixel resolution, 16 colours" write pause
+s" * AdLib sound" write
+s"   * FM synthesis - no digital sampling" write pause
+s" * All work done ON THE 286" write

slide5.jor

@@ -0,0 +1,11 @@
+header
+s" How would I learn all this?" write
+bullet
+pos    s" * StackOverflow" write pause
+moveto s" -----------" write pause
+s" * Graphics Programming Black Book" write
+s"   by Michael Abrash" write pause
+s" * Teach Yourself Game Programming in 21 Days" write
+s"   by Andre LaMothe" write pause
+s" * Commander Keen Dreams source code" write pause
+s" * Google... sometimes helped" write

slide6.jor

@@ -0,0 +1,8 @@
+header
+s" First Steps" write
+bullet
+s" * Could I write a tile engine?" write pause
+s" * Stretch goal: Could I make it scroll smoothly?" write pause
+s" * And obviously I've got to draw stuff on top..." write pause
+s" * Ooh, what about a stationary HUD?" write pause
+3 0 demo

slide7.jor

@@ -0,0 +1,7 @@
+BLUE bg!
+header
+s" Problems: One Month In" write
+bullet
+s" * Game logic was messy" write pause
+s" * Debugging is hard!" write pause
+s" * How to edit maps?" write

slide8.jor

@@ -0,0 +1,20 @@
+header
+s" I know, I'll just..." write pause
+s" WRITE MY OWN" write
+s" SCRIPTING LANGUAGE" write pause
+bullet
+s" What could POSSIBLY go wrong??" write pause
+
+header
+s" @SpindleyQ" write pause
+bullet
+s" ohhh noooo I am definitely going to" write
+s" write a 16-bit x86 Forth as a scripting" write
+s" language for my game, this is happeniiiiing" write pause
+
+header
+s" @mogwai_poet" write pause
+bullet
+s" @SpindleyQ Have you used forth before?" write
+s" It's like programming assembly" write
+s" on a CPU designed by an alien." write

slide9.jor

@@ -0,0 +1,8 @@
+header
+s" FORTH" write
+bullet
+s" * Invented by Chuck Moore around 1970" write pause
+s" * Still used in embedded systems & firmware" write pause
+s" * The tiniest possible useful language" write pause
+s" * 'If you've seen one Forth, you've seen one forth'" write pause
+s" * I called mine Jorth ( jean forth)" write

slidenot.es

@@ -0,0 +1,19 @@
+: slideNotes
+  bullet
+  s" * The tiniest abstraction may be the most flexible" write
+  s"   (if you're willing to trade off 'safety')" write
+
+* Forth is really, really good for one person who understands everything
+* It is not necessarily great for complex problems
+  (Change the problem!)
+* It is not necessarily great for co-operation
+  (write-only language)
+* It's kind of an anti-social language
+  (not least because you want to talk about it at length once you learn it!)
+
+Challenges:
+* I spent a couple of hours figuring out how to free up enough
+  memory in the data segment to hold my game engine, Jorth data,
+  graphics data, and the slide fonts, all at the same time
+* Then I wrote some more slides and ran out of RAM to store all
+  the text, so I

testbed.c

@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <dos.h>
+#include <alloc.h>
 
 #include "video.h"
 #include "kbd.h"
@@ -12,6 +13,7 @@
 #include "jorth.h"
 #include "egamap.h"
 #include "adlib.h"
+#include "slide.h"
 
 /*** T E X T ***/
 char far *font = NULL;
@@ -54,11 +56,23 @@ void text_draw(unsigned int vidOffset, unsigned char *s) {
 #define NUM_SPRITES 64
 #define TILE_STRIDE 64
 #define SPRITE_STRIDE 80
-unsigned int tiles[NUM_TILES * TILE_STRIDE];
-unsigned int sprites[NUM_SPRITES * SPRITE_STRIDE];
-
+unsigned int far *tiles;
+unsigned int far *sprites;
 unsigned char map[10000];
 
+void allocate_gfx() {
+  unsigned long memleft = farcoreleft();
+  tiles = farmalloc(NUM_TILES * TILE_STRIDE);
+  sprites = farmalloc(NUM_SPRITES * SPRITE_STRIDE);
+  if (!tiles || !sprites) {
+    printf("%lu bytes free - need %lu\n", memleft,
+      (unsigned long)
+	((NUM_TILES * TILE_STRIDE) +
+	 (NUM_SPRITES * SPRITE_STRIDE)));
+    exit(1);
+  }
+}
+
 void fillMap() {
   unsigned int x, y, z;
   z = 0;
@@ -74,6 +88,8 @@ void game_init() {
   FILE *f;
   TifImageMeta_t meta;
 
+  allocate_gfx();
+
   mouse_init();
 
   setEGAMode();
@@ -125,13 +141,16 @@ void f_keyWasPressed() {
   TOP().i = keyWasPressed(k);
   consumeKey(k);
 }
+
 void f_keyIsDown() {
   TOP().i = keyIsDown(TOP().i);
 }
+
 void f_drawSprite() { // ( x y sprite -- )
   drawSprite(&sprites[TOP().i * SPRITE_STRIDE], ST2().i, ST1().i);
   DROP(3);
 }
+
 void f_scroll() { // ( x y -- )
   scroll(ST1().i, TOP().i);
   DROP(2);
@@ -141,9 +160,11 @@ void f_scrollpos() { // ( -- x y )
   PUSHI(screen.scrollX);
   PUSHI(screen.scrollY);
 }
+
 void f_ticks() {
   PUSHU(timer_counter);
 }
+
 void f_splitscreen() {
   setSplitScreen(399 - (TOP().i << 1));
   DROP(1);
@@ -199,11 +220,51 @@ void f_adlib() {
   DROP(2);
 }
 
+cell f_atexit;
+void f_cleanup() {
+  f_execcp(f_atexit);
+}
+
+void f_320x200() {
+  FILE *f;
+  TifImageMeta_t meta;
+
+  setEGAMode();
+  tile_init();
+
+  f = fopen("FOOTER2.TIF", "rb");
+  meta = tifLoadMeta(f);
+  tifLoadEGA(f, meta, 0, 48, 336);
+  fclose(f);
+
+  f = fopen("TILES.TIF", "rb");
+  meta = tifLoadMeta(f);
+  tifLoadEGA(f, meta, OFF_TILES, NUM_TILES * 16, 16);
+  fclose(f);
+}
+
+void f_loadportraits() {
+  FILE *f;
+  TifImageMeta_t meta;
+
+  f = fopen("FOOTER.TIF", "rb");
+  meta = tifLoadMeta(f);
+  tifLoadEGA(f, meta, 0, 48, 336);
+  fclose(f);
+
+  f = fopen("PORTRAIT.TIF", "rb");
+  meta = tifLoadMeta(f);
+  tifLoadEGA(f, meta, OFF_PORTRAITS, NUM_PORTRAITS * 32, 32);
+  fclose(f);
+
+}
 void game_f_init(char *exe) {
   f_init(exe);
   CDEF("seremit", f_seremit);
   CDEF("key-pressed", f_keyWasPressed);
   CDEF("key-down", f_keyIsDown);
+  CDEF("key-start", kbd_init);
+  CDEF("key-end", kbd_cleanup);
   CDEF("draw-sprite", f_drawSprite);
   CDEF("draw-portrait", f_drawportrait);
   CDEF("scroll", f_scroll);
@@ -219,33 +280,25 @@ void game_f_init(char *exe) {
   CDEF("mousepos", f_mousepos);
   CDEF("mousebuttons", f_mousebuttons);
   CDEF("unfuck", tile_init);
+  CDEF("320x200", f_320x200);
+  CDEF("loadportraits", f_loadportraits);
+
+  slide_init();
   f_loadjor("gameboot.jor");
+
+  f_atexit = f_lookupcp("atexit");
+  atexit(f_cleanup);
+
 }
 
 void f_poll() {
   static char line[128] = { 0 };
 
-  int i = strlen(line);
-  int value;
-  for (value = ser_poll(); value != SER_NODATA; value = ser_poll()) {
-    if (value == '\b' || value == 127) {
-      i --;
-    } else {
-      line[i] = value;
-      i ++;
-    }
-    line[i] = '\0';
-    ser_write_byte(value); // echo
-
-    if (value == '\r') {
-      line[i - 1] = '\n';
-      ser_write_byte('\n');
-      PUSHS(line);
-      f_runstring("REPL send");
-      f_taskloop();
-      i = 0;
-      line[i] = '\0';
-    }
+  while (ser_getline(line)) {
+    PUSHS(line);
+    f_runstring("REPL send");
+    f_taskloop();
+    line[0] = '\0';
   }
 }
 

tiff.c

@@ -117,7 +117,7 @@ int tifLoadEGA(FILE *f, TifImageMeta_t meta, unsigned int vidOffset, int maxY, u
   return y;
 }
 
-int tifLoad(FILE *f, TifImageMeta_t meta, unsigned int *planeBuf, int maxY, int yRepeat, int planes) {
+int tifLoad(FILE *f, TifImageMeta_t meta, unsigned int far *planeBuf, int maxY, int yRepeat, int planes) {
   int istrip;
   int irow;
   int ipixelpair;
@@ -125,11 +125,11 @@ int tifLoad(FILE *f, TifImageMeta_t meta, unsigned int *planeBuf, int maxY, int
   unsigned long offset;
   unsigned char rowData[MAX_WIDTH >> 1];
   unsigned int planeStride = (meta.width >> 4) * yRepeat;
-  unsigned int *bp = planeBuf;
-  unsigned int *gp = bp + planeStride;
-  unsigned int *rp = gp + planeStride;
-  unsigned int *ip = rp + planeStride;
-  unsigned int *mp = ip + planeStride;
+  unsigned int far *bp = planeBuf;
+  unsigned int far *gp = bp + planeStride;
+  unsigned int far *rp = gp + planeStride;
+  unsigned int far *ip = rp + planeStride;
+  unsigned int far *mp = ip + planeStride;
   unsigned int bv, gv, rv, iv;
 
   if (meta.width > MAX_WIDTH || (meta.width % 16) != 0 || planes < 4 || planes > 5) {

tiff.h

@@ -14,4 +14,4 @@ typedef struct {
 
 TifImageMeta_t tifLoadMeta(FILE *f);
 int tifLoadEGA(FILE *f, TifImageMeta_t meta, unsigned int vidOffset, int maxY, unsigned int w);
-int tifLoad(FILE *f, TifImageMeta_t meta, unsigned int *planeBuf, int maxY, int yRepeat, int planes);
+int tifLoad(FILE *f, TifImageMeta_t meta, unsigned int far *planeBuf, int maxY, int yRepeat, int planes);

tiles.c

@@ -52,7 +52,7 @@ void blit32x32(unsigned int offsetFrom, unsigned int offsetTo) {
 TiledScreen_t screen = { 0, 0, 0, 0, { OFF_PAGE1, OFF_PAGE2 }, 0, 0, NULL, NULL,
   0, 0, 0, 0, 0 };
 
-void loadTiles(unsigned int tilesOffset, unsigned int *memTiles) {
+void loadTiles(unsigned int tilesOffset, unsigned int far *memTiles) {
   screen.tilesOffset = tilesOffset;
   screen.memTiles = memTiles;
 }
@@ -66,6 +66,7 @@ void loadMap(unsigned char *map, unsigned int w, unsigned int h) {
 
 int prepareBuffer(int pageX, int pageY) {
   unsigned char *dirty = &screen.dirty[screen.currentPage][pageX + (pageY * PAGE_TILES_W)];
+  int i;
   if (!isBufIndex(*dirty)) {
     unsigned int startX = screen.scrollX >> 4;
     unsigned int startY = screen.scrollY >> 4;
@@ -73,15 +74,18 @@ int prepareBuffer(int pageX, int pageY) {
     unsigned char ibuffer = screen.nextBuffer;
     screen.nextBuffer = nextBufferIndex(ibuffer);
     *dirty = ibuffer;
-    memcpy(screen.buffer[ibuffer], &screen.memTiles[tile * BUF_WSIZE], BUF_WSIZE << 1);
+    for (i = 0; i < BUF_WSIZE; i ++) {
+      screen.buffer[ibuffer][i] = (&screen.memTiles[tile * BUF_WSIZE])[i];
+    }
     screen.bufferOffset[ibuffer] = screen.pageOffset[screen.currentPage]
       + (pageX << 1) + (pageY * PAGE_STRIDE * 16);
   }
   return *dirty;
 }
 
-void drawSpriteToBuf(unsigned int *sprite, int pageX, int pageY, int shift, int yStart) {
-  unsigned int *buf, *mask;
+void drawSpriteToBuf(unsigned int far *sprite, int pageX, int pageY, int shift, int yStart) {
+  unsigned int *buf;
+  unsigned int far *mask;
   unsigned int maskval;
   int y, h, plane;
   if (pageX < 0 || pageY < 0 ||
@@ -122,7 +126,7 @@ void drawSpriteToBuf(unsigned int *sprite, int pageX, int pageY, int shift, int
   }
 }
 
-void drawSprite(unsigned int *sprite, int x, int y) {
+void drawSprite(unsigned int far *sprite, int x, int y) {
   int pageX = (int)(x - (screen.scrollX & 0xfff0)) >> 4;
   int pageY = (int)(y - (screen.scrollY & 0xfff0)) >> 4;
   int pageOffsetX = x & 0x0f;

tiles.h

@@ -4,9 +4,9 @@
 
 void tile_init();
 
-void loadTiles(unsigned int tilesOffset, unsigned int *memTiles);
+void loadTiles(unsigned int tilesOffset, unsigned int far *memTiles);
 void loadMap(unsigned char *map, unsigned int w, unsigned int h);
-void drawSprite(unsigned int *sprite, int x, int y);
+void drawSprite(unsigned int far *sprite, int x, int y);
 void scroll(int newX, int newY);
 void drawScreen();
 
@@ -17,7 +17,7 @@ void blit32x32(unsigned int offsetFrom, unsigned int offsetTo);
 #define PAGE_TILES_COUNT (PAGE_TILES_H * PAGE_TILES_W)
 #define PAGE_STRIDE (PAGE_TILES_W << 1)
 
-#define NUM_BUFFERS 32
+#define NUM_BUFFERS 20
 #define BUF_WSTRIDE 16
 #define BUF_WSIZE (BUF_WSTRIDE * 4)
 
@@ -29,7 +29,7 @@ typedef struct {
   unsigned int pageOffset[2];
   unsigned char dirty[2][PAGE_TILES_COUNT];
   unsigned int tilesOffset;
-  unsigned int *memTiles;
+  unsigned int far *memTiles;
   unsigned char *map;
   unsigned int buffer[NUM_BUFFERS][BUF_WSIZE];
   unsigned int bufferOffset[NUM_BUFFERS];