Re: [AD] About inp & outp

[Michael Bukin <M.A.Bukin@xxxxxxxxxx>]

Angelo Mottola <a.mottola@xxxxxxxxxx> writes:

> Now I'm open to all solutions: if it works for all as is now, let's
> stay as is; I don't want to force anyone to use my crappy solution;
> I'll just need to add a "#define inportb inp" and "#define outportb
> outp" to the sndscape.c file of my own Allegro distribuition, to
> ensure it works with my computer...

Could you try this patch.  If it does not work, try adding my_delay
before inportb and outportb, if it still does not work, remove
my_delay and replace inportb/outportb defines with inp/outp.  If the
last fix works, then we might just use it.

inp and inportb functions:

_inp:
    jmp _inportb

_inportb:
    pushl %ebp
    movl %esp, %ebp
    movl 0x8(%ebp), %edx
    inb (%dx), %al
    movzbl %al, %eax
    movl %ebp, %esp
    pop %ebp
    ret

It might be slightly different for other libc versions.


--- allegro/src/dos/sndscape.c	Mon May 15 02:17:00 2000
+++ allegro-3.9.32/src/dos/sndscape.c	Wed Jun 28 09:09:30 2000
@@ -28,6 +28,47 @@
 #endif
 
 
+#define LETS_ROCK 1
+
+#ifdef LETS_ROCK
+
+static void
+my_delay (void)
+{
+  volatile int i;
+  for (i = 0; i < 10; i++)
+    ;
+}
+
+static unsigned char
+my_inportb (unsigned short port)
+{
+  unsigned char data;
+  data = inportb (port);
+  my_delay ();
+  return data;
+}
+
+static void
+my_outportb (unsigned short port, unsigned char data)
+{
+  outportb (port, data);
+  my_delay ();
+}
+
+#ifdef inportb
+#undef inportb
+#endif
+#ifdef outportb
+#undef outportb
+#endif
+
+#define inportb(p)	(my_inportb ((p)))
+#define outportb(p,v)	(my_outportb ((p), (v)))
+
+#endif
+
+
 
 #define ODIE            0       /* ODIE gate array */
 #define OPUS            1       /* OPUS gate array */


-- 
Michael Bukin