store exe timestamp in JIM files; small game cleanups

boot.jor

@@ -60,11 +60,14 @@ defer onload
 : postload ' onload definition ' noop ' onload redefine execute ;
 
 : loadimage ( -- [0 | onload] )
+  imagemagic fget = if
     fget fget fget fget fget ( onload tasks latest size start )
     here != if tell + seek drop drop drop 0 else
-  dup here fread here + here! latest! tasks! then ;
+    dup here fread here + here! latest! tasks! then
+  else 0 then ;
 
 : saveimage ( herestart -- )
+  imagemagic fput
   ' onload definition here drop fput
   tasks fput
   latest fput

jopl.c

@@ -53,13 +53,13 @@ void f_keydown() {
   TOP().i = keyIsDown(TOP().i);
 }
 
-void do_repl() {
+void do_repl(char *exe) {
   char buf[128];
 
   adlib_init();
 
   timer_init(TIMER_18HZ);
-  f_init();
+  f_init(exe);
 
   CDEF("quit", f_quit);
   CDEF("adlib!", f_adlib_write);
@@ -84,7 +84,7 @@ void do_repl() {
   }
 }
 
-int main() {
-  do_repl();
+int main(int argc, char *argv[]) {
+  do_repl(argv[0]);
   return 0;
 }

jopl.jor

@@ -99,6 +99,7 @@ var octave
 : %V voice ! ;
 : mknote create b, does> ub@ oct+ notestate @ if b, else noteon rest then ;
 : %loop 0xfe b, , ;
+: mod % ;
 : % notestate @ if 0xf0 b, else rest then ;
 : %% 0 for % next ;
 : %- notestate @ if 0xfd b, else noteoff then ;
@@ -134,11 +135,14 @@ array tracks 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 ,
 : ;track %loop 0 notestate ! ;
 : shush 0 voice @ track ! %- ;
 
+var tempo 1 tempo !
 : player
   1 songticks +!
+  songticks @ tempo @ mod 0 = if
     voice @
     0 10 for i voice ! i track-tick next
-  voice ! ;
+    voice !
+  then ;
 
 var t2
 : startt2

jorth.c

@@ -2,6 +2,7 @@
 
 #include <stdio.h>
 #include <sys/stat.h>
+#include <dos.h>
 #include "jorth.h"
 #include "serial.h"
 
@@ -164,6 +165,26 @@ void f_bset() {
   DROP(1);
 }
 
+void f_farset() {
+  *((cell far *)MK_FP(TOP().u, ST1().u)) = ST2();
+  DROP(3);
+}
+
+void f_farget() {
+  ST1() = *((cell far *)MK_FP(TOP().u, ST1().u));
+  DROP(1);
+}
+
+void f_farbset() {
+  *((char far *)MK_FP(TOP().u, ST1().u)) = ST2().i;
+  DROP(3);
+}
+
+void f_farbget() {
+  ST1().i = *((char far *)MK_FP(TOP().u, ST1().u));
+  DROP(1);
+}
+
 void f_addset() {
   TOP().p->i += ST1().i;
   DROP(2);
@@ -841,10 +862,25 @@ void f_image_up_to_date() {
   TOP().i = uptodate;
 }
 
+static int imagemagic = -1;
+static void f_calc_imagemagic(char *exefilename) {
+  struct stat exe;
+  if (stat(exefilename, &exe) == 0) {
+    imagemagic = exe.st_mtime;
+  }
+}
+
+
 void f_loadimage() {
   cell *start, *latestNew, *tasksNew;
   size_t size;
+  int magic;
 
+  fread(&magic, sizeof(int), 1, ACTIVE_FILE);
+  if (magic != imagemagic) {
+    PUSHI(0);
+    return;
+  }
   fread(&start, sizeof(cell *), 1, ACTIVE_FILE);
   fread(&latestNew, sizeof(cell *), 1, ACTIVE_FILE);
   fread(&tasksNew, sizeof(cell *), 1, ACTIVE_FILE);
@@ -863,6 +899,7 @@ void f_loadimage() {
 
 void f_saveimage() {
   size_t size = (size_t)(((char*)HERE) - TOP().s);
+  fwrite(&imagemagic, sizeof(int), 1, ACTIVE_FILE);
   fwrite(&TOP().p, sizeof(cell *), 1, ACTIVE_FILE);
   fwrite(&LATEST, sizeof(cell *), 1, ACTIVE_FILE);
   fwrite(&TASKS, sizeof(cell *), 1, ACTIVE_FILE);
@@ -991,7 +1028,9 @@ void f_taskusersize() {
   PUSHU(TASK_USER_SIZE);
 }
 
-void f_init() {
+void f_init(char *exe) {
+  f_calc_imagemagic(exe);
+
   CDEF("[", f_compileoff); f_immediate();
   CDEF("]", f_compileon);
   CDEF("key", f_key);
@@ -1053,6 +1092,10 @@ void f_init() {
   CDEF("b@", f_bget);
   CDEF("ub@", f_ubget);
   CDEF("b!", f_bset);
+  CDEF("!far", f_farset);
+  CDEF("@far", f_farget);
+  CDEF("b!far", f_farbset);
+  CDEF("b@far", f_farbget);
   CDEF("dup", f_dup);
   CDEF("over", f_over);
   CDEF("drop", f_drop);
@@ -1112,6 +1155,7 @@ void f_init() {
   PCONST("$DOCREATE", f_docreate);
   PCONST("$DOVAR", f_dovar);
   PCONST("$DODEFERRED", f_dodeferred);
+  ICONST("imagemagic", imagemagic);
 #ifdef TRACE
   CDEF("traceon", f_traceon);
   CDEF("traceoff", f_traceoff);

jorth.h

@@ -4,7 +4,7 @@
 #define STACK_SIZE 64
 #define RSTACK_SIZE 32
 
-void f_init();
+void f_init(char *exe);
 
 void f_cdef();
 void f_immediate();

road.jor

@@ -4,7 +4,9 @@
 
 :noname
   1 player.state DRIVING f!
-  :| player yield chuck yield 0 |; ' entities redefine
+  :| player yield
+     chuck.state @ CHUCK-HOME = if chuck yield then
+     0 |; ' entities redefine
   :|
 touch-begin E leaving? dup
   if pete say" It's 100 miles to the next town." then

state.jor

@@ -1,4 +1,5 @@
-0 const CHUCK-LOST
-1 const CHUCK-FOLLOW
-2 const CHUCK-HOME
+0 const CHUCK-GONE
+1 const CHUCK-SEARCH
+2 const CHUCK-FOLLOW
+3 const CHUCK-HOME
 var chuck.state

testbed.c

@@ -199,8 +199,8 @@ void f_adlib() {
   DROP(2);
 }
 
-void game_f_init() {
-  f_init();
+void game_f_init(char *exe) {
+  f_init(exe);
   CDEF("seremit", f_seremit);
   CDEF("key-pressed", f_keyWasPressed);
   CDEF("key-down", f_keyIsDown);
@@ -253,10 +253,10 @@ int DONE = 0;
 static void f_quit() {
   DONE = 1;
 }
-void do_repl() {
+void do_repl(char *exe) {
   char buf[128];
 
-  f_init();
+  f_init(exe);
   CDEF("quit", f_quit);
   CDEF("adlib", f_adlib);
 
@@ -270,15 +270,15 @@ void do_repl() {
   }
 }
 
-int main(int argc) {
+int main(int argc, char *argv[]) {
   cell tick, draw;
   if (argc > 1) {
-    do_repl();
+    do_repl(argv[0]);
     return 0;
   }
   ser_init(SER_COM2, BAUD_19200, SER_8N1);
   game_init();
-  game_f_init();
+  game_f_init(argv[0]);
   tick = f_lookupcp("tick");
   draw = f_lookupcp("draw");
 

trail1.jor

@@ -11,7 +11,7 @@ car :touch
 0 player.state DRIVING f!
 
 :| player yield
-   chuck.state @ CHUCK-LOST = if e_chuck yield then
+   chuck.state @ CHUCK-SEARCH = if e_chuck yield then
    player.driving? not if car yield then
    0 |; ' entities redefine
 
@@ -22,7 +22,7 @@ touch-begin S leaving? dup
     else player move-entity 13 7 road.jor queue-level
     then
   then
-chuck.state @ CHUCK-LOST = if
+chuck.state @ CHUCK-SEARCH = if
   touch-next 37 60 2= dup
     if
       pete say" Oh for the love of..."