v1.1

Author: Redirect "Slash" NIL

DOS+DMPI Support files/addDev.asm

@@ -0,0 +1,17 @@
+o CWSDPMI.EXE
+  If you compile for DOS with DJGPP, you will first need cwsdpmi.exe in
+  the same directory where you run your executable.
+  The default cwsdpmi tries to use your C: drive for temporary, which is
+  rather nasty and has reportedly caused some corruption on NTFS systems.
+  Moreover, this temp space is seldom needed. The cwsdpmi.exe provided 
+  here has the temp space disabled.
+o ASPI.SYS
+  Also, you will need a DOS ASPI driver to access CD-ROM units. This 
+  driver is provided as well (OAK CD-ROM driver).
+o addDev/delDev
+  Finally, rather than go through the cumbersome process of loading this
+  driver through config.sys, the addDev utility is provided (with source)
+  You can load the aspi.sys driver (or any other driver) at any time by
+  using the command: 
+    addDev ASPI.SYS
+  The delDev counterpart is also provided.

DOS+DMPI Support files/addDev.com

@@ -1 +1,8 @@
+v1.1 - o Improved Linux support:
+	  Recent versions of the Linux kernel do sgio passthru natively, and cancel the
+	  need for the SCSI generic module and /dev/sg#
+	  For instance, you can now access a /dev/hdc DVD-ROM directly
+	  sgioReadName() was modified accordingly for proper scanning of these devices.
+	o DOS/DPMI support files now included (for DJGPP users)
+
 v1.0 - first release

DOS+DMPI Support files/aspi.sys

@@ -53,7 +53,9 @@
 
 #endif
 
-#define MAX_DEV_SG 29 /* tbd: what number is beyond the last of "/dev/sg*"? */
+#define MAX_DEV_HD  20  /* hda -> hdt */
+#define MAX_DEV_SG  17  /* sg0 -> sg16 */
+#define MAX_DEV_SCD 16  /* scd0 -> scd15 */
 
 /**
 **  Describe a Linux ioctl SG_IO connection to a device.
@@ -548,9 +550,7 @@ int sgioGetSense(Sgio * sgio, char * chars, int charsLength, int elseLength)
 /**
 **  Read the first else the next well known device path name.
 **
-**  That is, read names from the list:
-**
-**      /dev/sg0 /dev/sg1 /dev/sg2 .. /dev/sg$MAX_DEV_SG
+**  UPDATED: Recent Linux kernel handle standard devices as SGIO ones
 **
 **  Copy a name of up to charsLength to the chars.
 **
@@ -570,16 +570,24 @@ int sgioReadName(Sgio * sgio, char * chars, int charsLength)
     /* Return negative after the last name. */
 
     int readNameInt = sgio->theReadNameInt;
-    if (MAX_DEV_SG < readNameInt) return -1;
+    if ((MAX_DEV_HD+MAX_DEV_SG+MAX_DEV_SCD) <= readNameInt) return -1;
 
     /* Read a "/dev/sg$number" name. */
 
     sgio->theReadNameInt = (readNameInt + 1);
 
     /* Print the name. */
 
-    char name[] = "/dev/sg9876543210";
-    (void) sprintf(&name[0], "/dev/sg%ld", (long) readNameInt);
+    char name[] = "/dev/hda876543210";
+    if (readNameInt < MAX_DEV_HD)
+    {
+        name[7] += readNameInt;
+        name[8] = 0;
+    }
+    else if ((readNameInt - MAX_DEV_HD) < MAX_DEV_SG)
+        (void) sprintf(&name[0], "/dev/sg%ld", (long) (readNameInt - MAX_DEV_HD));
+    else 
+        (void) sprintf(&name[0], "/dev/scd%ld", (long) (readNameInt - MAX_DEV_HD - MAX_DEV_SG));
 
     /* Copy the name if it fits. */