Mercurial > hg > Members > kono > os9 > sbc09

diff io.c @ 46:ec9f494497e1

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vdisk fix
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Fri, 20 Jul 2018 11:48:19 +0900
parents 07c84761da6f
children 15f1e1b49928
line wrap: on
line diff
--- a/io.c	Thu Jul 19 16:21:47 2018 +0900
+++ b/io.c	Fri Jul 20 11:48:19 2018 +0900
@@ -45,6 +45,9 @@
 /*
  *   IO Map ( can be overrupped by ROM )
  *
+ *   In do_input/do_output call, we cannot access 6809 registers, since it is in i*reg, 
+ *     which  is a local variable of interpr
+ *
  *   IOPAGE ~ IOPAGE+0x7f
  *       for OS9 level2
  *       IOPAGE 0xff80 means ioport beging 0xff80 but IOPAGE itself starts 0xff00
@@ -74,9 +77,9 @@
  *                                       0xd1- VDISK command
  *   IOPAGE + 0x41   drive no           / VDISK drv
  *   IOPAGE + 0x42   LSN2               / VDISK sysmode  0 for system, 1 for user 
- *   IOPAGE + 0x43   LSN1               / VDISK Curdir pd number
- *   IOPAGE + 0x44   LSN0               / VDISK file attribute
- *   IOPAGE + 0x45   ADR2
+ *   IOPAGE + 0x43   LSN1               / VDISK Curdir pd number (2 byte)
+ *   IOPAGE + 0x44   LSN0     
+ *   IOPAGE + 0x45   ADR2               / VDISK caller stack
  *   IOPAGE + 0x46   ADR1
  *
  *
@@ -104,6 +107,11 @@
 FILE *logfile;
 FILE *disk[] = {0,0};
 
+#ifdef USE_VDISK
+extern void do_vdisk(int c);
+#endif
+
+
 #ifdef USE_MMU
 extern char *prog ;   // for disass
 extern Byte * mem0(Byte *iphymem, Word adr, Byte *immu) ;
@@ -329,7 +337,7 @@
    } else if (c==0x55) {
       if (lseek(fileno(disk[drv]),lsn*SECSIZE,SEEK_SET)==-1) goto error;
       if (write(fileno(disk[drv]),phy,SECSIZE)==-1) goto error;
-#ifdef VDISK
+#ifdef USE_VDISK
    } else  {
        do_vdisk(c);
 #endif