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QL_files.c
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/*
* (c) UQLX - see COPYRIGHT
*/
/*#include "QLtypes.h"*/
#include "QL68000.h"
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/stat.h>
#include "QL.h"
#include "QLfiles.h"
#include "QFilesPriv.h"
#include "QSerial.h"
/*#include "SelectFolder.h"*/
#include "QInstAddr.h"
#include "QDisk.h"
#include "unix.h"
#include "QDOS.h"
#include "qx_proto.h"
#define MDV_ID 0x28b07ae4
extern void rts(void);
extern uw32 mdv_doopen(struct mdvFile *, int , int , int , uw32);
extern int QDiskOpenDir(struct mdvFile *);
w32 floppy_ref,win_ref,mdv_ref;
Str255 flpName[2];
#define STATICDEVS 1
# include "emudisk.h"
short mdvVol[2];
long mdvDir[2];
short mdvOn=0;
unsigned char mdvHeaders[28];
void FilenameFromQL(unsigned char *fName)
{
short l,i,j;
unsigned char c;
unsigned char *s="-noASCII- ";
Cond lastAscii=false;
char *hexDigit="0123456789ABCDEF";
return;
*fName=0;
l=fName[1];
if(l>31) l=fName[1]=31;
if(l==0) BlockMoveData("-noname-",fName+1,9);
else
{ /* examine filename for non ascii characters */
for(i=1;i<=l;i++)
{
c=fName[1+i];
if(c<32 || c==':') /* || c>127 */
{
if(l>7) l=7;
j=10;
for(i=1;i<=l;i++)
{
c=fName[1+i];
if(c<34 || c>127 || c==':')
{
if(i>1) s[j++]=32;
if(c>15) s[j++]=hexDigit[(c>>4)&15];
s[j++]=hexDigit[c&15];
lastAscii=false;
}
else
{
if(!lastAscii)
{
s[j++]=33;
lastAscii=true;
}
s[j++]=c;
}
}
s[0]=j-1;
BlockMoveData(s,fName+1,j);
break;
}
}
}
}
static void NameToQL(Str255 name)
{
unsigned char *p;
short l,j;
return;
l=name[0];
if(l<10) return;
p=name+1;
if(*p++!='-') return;
if(((*p++)&223)!='N') return;
if(((*p++)&223)!='O') return;
if(((*p++)&223)!='A') return;
if(((*p++)&223)!='S') return;
if(((*p++)&223)!='C') return;
if(((*p++)&223)!='I') return;
if(((*p++)&223)!='I') return;
if(*p++!='-') return;
l-=9;
j=0;
while(l>0)
{
if(*p==33)
{
p++;
l--;
while(l>0 && *p!=32)
{
name[++j]=*p++;
l--;
}
p++;
l--;
}
else
{
name[++j]=(*p++)-'0';
if(name[j]>9) name[j]-=7;
l--;
if(l>0 && *p!=32)
{
name[j]=(name[j]<<4)+(*p>'9'? *p+10-'A':*p-'0');
l--;
}
p++;
l--;
}
}
name[0]=j;
}
static Cond HasName(Str255 name)
{
unsigned char *p;
p=(unsigned char *)name;
if(*p++!=8) return true;
if(*p++!='-') return true;
if(((*p++)&223)!='N') return true;
if(((*p++)&223)!='O') return true;
if(((*p++)&223)!='N') return true;
if(((*p++)&223)!='A') return true;
if(((*p++)&223)!='M') return true;
if(((*p++)&223)!='E') return true;
if(*p!='-') return true;
return false;
}
static void DrawMdvLeds(void)
{
/* draw microdrive leds:
all off if mdvOn==0
otherwise the#mdvOn led is on, the others are off
*/
}
void StopMotor(void)
{
mdvOn=0;
DrawMdvLeds();
}
static void InitDirDevDriver(Str255 name,w32 addr,w32 *fsid)
{
w32 savedRegs[4];
w32 *p;
/*printf("Init driver %s\n",name);*/
BlockMoveData(aReg,savedRegs,4*sizeof(w32));
reg[1]=38+strlen(name);
if((strlen(name)&1)!=0) reg[1]++;
reg[2]=0;
QLtrap(1,0x18,20000l); /* allocate memory for the driver linkage block */
if((*reg)==0)
{
#if 1
*fsid=aReg[0];
p=(w32*)(aReg[0]+(Ptr)theROM+4);
WL(p++,addr);
WL(p++,addr+2);
WL(p++,addr+4);
WL(p,addr+6);
p+=3;
WL(p++,addr+8);
WL(p++,36);
WL(p,0);
#endif
#if 0
*fsid=aReg[0];
p=(w32*)(aReg[0]+(Ptr)theROM+4);
*p++=addr;
*p++=addr+2;
*p++=addr+4;
*p=addr+6;
p+=3;
*p++=addr+8;
*p++=36;
*p=0;
#endif
BlockMoveData(name,(Ptr)p+2,strlen(name)+1);
WW((Ptr)p,strlen(name));/* *(uw16*)p=strlen(name);*/
QLtrap(1,0x22,20000l); /* link directory device driver in IOSS */
}
BlockMoveData(savedRegs,aReg,4*sizeof(w32));
}
#if 0
void InitFileDrivers(Str255 floppyName,Str255 hDiskName)
{
short i;
mdvHeaders[0]=mdvHeaders[14]=255;
mdvHeaders[1]=mdvHeaders[15]=0;
if(floppyName!=nil)
{
i=strlen(floppyName)-1;
/*while(i>-1) floppyName[i--]&=223; */
InitDirDevDriver(floppyName,0x14000,&floppy_ref);
}
if(hDiskName!=nil)
{
i=strlen(hDiskName)-1;
/*while(i>-1) hDiskName[i--]&=223;*/
InitDirDevDriver(hDiskName,0x14000,&win_ref);
}
InitDirDevDriver("MDV",0x14000,&mdv_ref);
InstallSerial();
}
#endif
void * Cleandir(char *nam)
{
DIR *d;
struct stat s;
int n;
d = opendir(nam);
if(d)
{
struct dirent *p;
while(p = readdir(d))
{
char *pd, d_name[PATH_MAX];
if(*p->d_name == '.' &&
(*(p->d_name+1) == 0 || *(p->d_name+1) == '.'))
continue;
pd = (char*) stpcpy(d_name, nam);
if(*(pd-1) != '/')
{
*pd++ = '/';
}
strcpy(pd, p->d_name);
n = stat(d_name, &s);
if(S_ISDIR(s.st_mode))
{
Cleandir(d_name);
}
else
{
unlink (d_name);
}
}
closedir(d);
rmdir(nam);
}
return d;
}
void InitRAMDev(char *dev)
{
short i,j;
for(i = 0; i < MAXDEV; i++)
{
if(qdevs[i].qname && strcmp(qdevs[i].qname, dev) == 0)
{
for(j = 0; j < 8; j++)
{
char *ptr;
if((ptr = qdevs[i].mountPoints[j]) != NULL)
{
ptr += strlen(ptr);
if(*(ptr-1) == '/')
{
*--ptr = '\0';
}
/*printf("Making dir %s\n",qdevs[i].mountPoints[j]);*/
mkdir(qdevs[i].mountPoints[j], 0755);
*ptr = '/';
/*printf("Making dir %s\n",qdevs[i].mountPoints[j]);*/
}
}
break;
}
}
}
void CleanRAMDev(char *dev)
{
short i,j;
for(i = 0; i < MAXDEV; i++)
{
if(qdevs[i].qname && strcmp(qdevs[i].qname, dev) == 0)
{
for(j = 0; j < 8; j++)
{
char *ptr;
if((ptr = qdevs[i].mountPoints[j]) != NULL
&& qdevs[i].clean[j])
{
ptr += (strlen(ptr)-1);
if(*ptr == '/')
{
*ptr = '\0';
}
/*printf("Removing dir %s\n",qdevs[i].mountPoints[j]);*/
Cleandir (qdevs[i].mountPoints[j]);
}
}
break;
}
}
}
void InitFileDrivers ()
{
short i,j;
mdvHeaders[0] = mdvHeaders[14] = 255;
mdvHeaders[1] = mdvHeaders[15] = 0;
for (i = MAXDEV - 1; i >= 0; i--)
{
if (qdevs[i].qname)
{
/*printf("Initialising %s\n", qdevs[i].qname);*/
for (j=0; j<8; j++) if (qdevs[i].Present[j]) break;
if (j<8)
InitDirDevDriver (qdevs[i].qname, 0x14000, (w32 *)&qdevs[i].ref);
}
}
InstallSerial ();
InitRAMDev("RAM");
}
w32 PhysicalDefBlock(void)
{
w8 driveID; /* drive number */
w32 pdb; /* physical definition block pointer */
driveID=ReadByte(*aReg+0x1d);
pdb=ReadLong(0x28100+((w32)driveID<<2));
return pdb;
}
static void VolBytes(short vol,long *total,long *empty)
{ /* returns #total and #empty sectors on the selected file device (deleted) */
printf("calling VolBytes\n");
}
static struct mdvFile *MacFile(Cond check)
{
struct mdvFile *f;
if(*aReg<131072 || *aReg>RTOP-130)
{
CustomErrorAlert("bad channel block address");
return nil;
}
f=(struct mdvFile *)((Ptr)theROM+((*aReg)&ADDR_MASK_E)+0x1e);
if(!check) return f;
if(GET_ID(f)==MDV_ID) return f;
return nil;
}
int file_reopen(struct mdvFile * f, int frk)
{
int a,filesys,drive,i,key,res;
uw32 pdb;
struct mdvFile *next;
a= RL((char*)f - 0x1e + 4);
filesys = -1;
for (i = 0; i < MAXDEV; i++)
{
if(qdevs[i].qname)
{
if (a == qdevs[i].ref)
{
filesys = i;
break;
}
}
}
if (filesys == -1) return -1;
drive=*((char*)f+5-(0x1e - 0x18 ));
key=*((char*)f+4-(0x1e - 0x18 ));
drive=ReadByte(pdb=ReadLong(0x28100+drive*4)+20);
if (frk) next= GET_NEXT(f);
res=mdv_doopen(f, filesys, drive, key, pdb);
if (frk) SET_NEXT(f,next);
/*printf("file_reopen res=%d\n",res);*/
return res;
}
void MdvIO(void)
{
struct mdvFile *f;
short op;
long eof;
long total,empty;
long count;
int isdisk;
short i;
short n;
w8 *p;
w16 *w;
w8 b;
if((Ptr)gPC-(Ptr)theROM-2 != 0x14000l)
{
exception=4;
extraFlag=true;
nInst2=nInst;
nInst=0;
return;
}
f=MacFile(0);
/* printf("MacFile res: %x\n",f);*/
if(f==nil)
{
xerr:
*reg=-18; /* overflow */
rts();
return;
}
/* test if it is a shared file' duplicate */
if ((GET_ID(f)!=MDV_ID) || (!GET_OPEN(f)))
{
/* we MUST assume it is... */
/*printf("need reopen file : %s\n",NAME_REF(f)+2);*/
if (file_reopen(f,0)<0) goto xerr;
}
if(!GET_OPEN(f))
{
*reg=-7; /* not found */
rts();
return;
}
#if 0
if ( (GET_ISDIR(f) || GET_KEY(f)==1) && (op==5 || op==7 || op==0x49 || op==0x46))
{
*reg=QERR_RO;
rts();
return;
}
#endif
op=*reg;
*reg=0;
if(GET_ISDIR(f) && (op==5 || op==7 || op==0x49 || op==0x46)) debug2("Writing to directory. op=",op);
isdisk = GET_ISDISK(f);
if( isdisk == 0 || isdisk == 2) (void)QHostIO(f,op,isdisk);
else QDiskIO(f,op);
rts();
}
//#define TRACE_OPEN
uw32 mdv_doopen(struct mdvFile * f, int filesys, int drive, int key, uw32 pdb)
{
struct HF_FCB *fcb;
w32 res;
short onDisk, alloc_fcb,canExist,canCreate,perm,e;
/*
* BEWARE : the logic of this function is so broken that gdb can't
* debug it -- adding a few more bizare statements a'la "1==1;"
*/
{
alloc_fcb=0;
SET_FILESYS(f,filesys);
SET_OPEN(f,false);
drive--;
if(qdevs[filesys].Present[drive])
{
#ifdef TRACE_OPEN
printf("MDVOpen : name %s namelen %d %s\n",NAME_REF(f)+2,RW(NAME_REF(f)), (key==4 ? "as directory":""));
#endif
SET_ISDISK(f,onDisk=qdevs[filesys].Where[drive]);
SET_DRIVE(f,drive);
fcb=(Ptr)malloc(sizeof(struct HF_FCB));
alloc_fcb=1;
SET_FCB(f,fcb);
SET_KEY(f,key);
res=0;
if(key!=Q_DIR && !onDisk) FilenameFromQL(NAME_REF(f));
if(key>=Q_DIR || key<0)
{
if(key==Q_DIR) /* open directory */
{
SET_ISDIR(f,true);
if(onDisk == 0 || onDisk == 2)
res=QHOpenDir(f, onDisk);
else res=QDiskOpenDir(f);
/* printf("OpenDir retval %d\n",res); */
}
else if(key<0) /* delete file */
{
if(onDisk == 0 || onDisk == 2)
res=HDelete(mdvVol[drive],mdvDir[drive],NAME_REF(f),f,2);
else
res=QDiskDelete(f);
}
else res=-15; /* bad parameter */
}
else /* open file */
{
canExist=key!=Q_IO_NEW;
canCreate=key>=Q_IO_NEW;
/*printf("open %s key=%d, cancreate: %d\n",NAME_REF(f)+2,key,canCreate);*/
if( onDisk == 0 || onDisk == 2 )
{
perm=( key==1 ? O_RDONLY : O_RDWR ) | (canExist && canCreate ? O_CREAT : 0 );
e=HOpenDF(mdvVol[drive],mdvDir[drive],NAME_REF(f),perm,f,0,onDisk);
if (e && (key !=2)) {
perm= O_RDONLY | (canExist && canCreate ? O_CREAT : 0 );
e=HOpenDF(mdvVol[drive],mdvDir[drive],NAME_REF(f),perm,f,0,onDisk);
}
if(e==0 && !canExist)
{
res=-8; /* already exists */
FSClose(GET_HFILE(f));
}
else
if(e==0) /* file succesfully opened */
SET_ISDIR(f,false);
else
{
if(e==-49) res=-9; /* in use */
else
{
res=QERR_NF;
if(canCreate)
{
/*printf("file name %s\n",NAME_REF(f)+2);*/
perm=(key==1 ? O_RDONLY : O_RDWR ) | (canExist && canCreate ? O_CREAT : 0 );
e=HOpenDF(mdvVol[drive],mdvDir[drive],NAME_REF(f),perm|O_CREAT,f,canCreate,onDisk);
if (e && (key !=2)) {
perm=O_RDONLY | (canExist && canCreate ? O_CREAT : 0 );
e=HOpenDF(mdvVol[drive],mdvDir[drive],NAME_REF(f),perm,f,0,onDisk);
}
res=0;
if(e!=0)
res=QERR_NF;
}
}
}
}
else
res=QDiskOpen(f,drive,canExist,canCreate);
}
StopMotor();
}
else res=QERR_NF;
drive++;
}
noBlock:
if(res==0 && GET_KEY(f)>=0)
{
drive--;
if (GET_KEY(f)==3)
if (qdevs[filesys].Where[drive]==1 )
{
struct fileHeader *h;
h=GetFileHeader(GET_FNUMBER(f));
if (h)
{
SET_FLEN(h,64);
RewriteHeader();
KillFileTail(GET_FNUMBER(f),0);
}
}
else ftruncate(GET_HFILE(f),0);
SET_POS(f,64); /*f->pos=64;*/
if( onDisk == 0 || onDisk == 2) SET_EOF(f,HDfLen(f,onDisk)+64);
else SET_EOF(f,QDiskLen(f)+64);
/*printf("File pos %d, File len %d\n",GET_POS(f),GET_EOF(f));*/
qdevs[filesys].OpenFiles[drive]++;
SET_NEXT(f,qdevs[filesys].FileList[drive]);
qdevs[filesys].FileList[drive]=f;
if ( onDisk==0 || onDisk==2 ){ /* linking for QDisk not necessary */
fcb->next=qdevs[filesys].fcbList[drive];
qdevs[filesys].fcbList[drive]=fcb;
}
SET_OPEN(f,true);
SET_ID(f,MDV_ID);
}
else
if(alloc_fcb)free(fcb);
#ifdef TRACE_OPEN
printf("mdv_doopen returns %d\n",res);
#endif
return res;
}
void MdvOpen(void)
{
w8 drive;
struct mdvFile * f=nil;
struct HF_FCB *fcb;
Cond canCreate;
Cond canExist;
Cond onDisk;
w32 filesys;
int perm, alloc_fcb=0;
OSErr e;
w32 a;
short i;
w8 *p;
int key;
if((Ptr)gPC-(Ptr)theROM-2 != 0x14002l)
{
exception=4;
extraFlag=true;
nInst2=nInst;
nInst=0;
return;
}
drive=ReadByte(aReg[1]+0x14);
if(drive > 0 && drive < 9)
{
f=MacFile(false);
/* printf("macfile res: %x\n",f);*/
if(f==nil)
{
*reg=-18; /* overflow */
goto noBlock;
}
a=aReg[3]+0x18;
filesys = -1;
for (i = 0; i < MAXDEV; i++)
{
if(qdevs[i].qname)
{
if (a == qdevs[i].ref)
{
filesys = i;
break;
}
}
}
if (filesys == -1)
{
printf ("wrong filesystem\n");
*reg = -7;
goto noBlock;
}
key=ReadByte(*aReg+0x1c);
reg[0]=mdv_doopen(f,filesys,drive,key,aReg[1]);
}
noBlock:
rts();
}
/* create new filedescriptors for all files inherited across fork*/
void fork_files()
{
int fs,dr;
int nfd;
struct mdvFile *f;
#if 0
OpenDisk(0); /* that was it for diskimage access :-) */
#endif
for(fs=0;fs<MAXDEV;fs++)
for(dr=0;dr<8;dr++)
if( qdevs[fs].Present[dr])
{
if ( (qdevs[fs].Where[dr]==0 || qdevs[fs].Where[dr]==2 )
&& (f=(qdevs[fs].FileList[dr])) )
while(f!=nil && ((int)f&1)==0 && GET_ID(f)==MDV_ID)
{
nfd=GET_HFILE(f);
close(nfd);
file_reopen(f,1);
/*reopen_uxfile(f);*/
f=GET_NEXT(f);
}
}
}
void CloseAllMdvFiles(short drive, int filesys)
{
struct mdvFile *f;
int isdisk;
f=qdevs[filesys].FileList[drive];
while(f!=nil && ((int)f&1)==0 && GET_ID(f)==MDV_ID)
{
if(GET_OPEN(f))
{
isdisk = GET_ISDISK(f);
if( isdisk == 0 || isdisk == 2)
{
FSClose(GET_HFILE(f));
free(GET_FCB(f));
#if 0
if(GET_ISDIR(f)) HDelete(mdvVol[drive],mdvDir[drive],NAME_REF(f));
#endif
}
else
{
QDiskClose(f);
free(GET_FCB(f));
}
}
SET_OPEN(f,false);
SET_ID(f,0);
f=GET_NEXT(f);
}
qdevs[filesys].FileList[drive]=nil;
qdevs[filesys].fcbList[drive]=nil;
qdevs[filesys].OpenFiles[drive]=0;
}
void CloseAllFiles(void)
{
#if 0
CloseAllMdvFiles(0);
CloseAllMdvFiles(1);
mdvOn=0;
DrawMdvLeds();
#endif
}
Cond FileAlreadyOpen(short drive,int filesys,FileNum fileNum,w16 *perm) /* works for ql disks only */
{
struct mdvFile *f;
f=qdevs[filesys].FileList[drive];
while(f!=nil)
{
if(GET_OPEN(f) && (GET_ISDISK(f)==1) &&
GET_FNUMBER(f).file==fileNum.file)
{
*perm=GET_KEY(f);
return true;
}
f=GET_NEXT(f);
}
return false;
}
static void UnlinkOpenFile(short drive,struct mdvFile *f)
{
struct mdvFile *p;
struct HF_FCB *fcb,*fb;
int isdisk;
int filesys=GET_FILESYS(f);
fb=GET_FCB(f);
p=qdevs[filesys].FileList[drive];
if(p==f) qdevs[filesys].FileList[drive]=GET_NEXT(f);
else
{
while(p!=nil && GET_NEXT(p)!=f) p=GET_NEXT(p);
if(GET_NEXT(p)==f) SET_NEXT(p,GET_NEXT(f));
}
isdisk = GET_ISDISK(f);
if (isdisk == 0 || isdisk == 2){
fcb=qdevs[filesys].fcbList[drive];
if (fcb==fb) qdevs[filesys].fcbList[drive]=fcb->next;
else {
while(fcb && fcb->next !=fb) fcb=fcb->next;
if (fb == fcb->next) fcb->next=fb->next;
}
}
}
void MdvClose(void)
{
w32 pdb; /* physical definition block pointer */
w8 d;
struct mdvFile *f;
int filesys;
if((Ptr)gPC-(Ptr)theROM-2 != 0x14004l)
{
exception=4;
extraFlag=true;
nInst2=nInst;
nInst=0;
return;
}
f=MacFile(true);
if(f==nil)
{
*reg=-18; /* overflow */
rts();
return;
}
if ((GET_ID(f)!=MDV_ID) || (!GET_OPEN(f)))
{
*reg=-18; /* overflow */
rts();
return;
}
if(GET_OPEN(f))
{
if(GET_ISDISK(f) == 1) QDiskClose(f);
else FSClose(GET_HFILE(f));
}
filesys=GET_FILESYS(f);
qdevs[filesys].OpenFiles[GET_DRIVE(f)]--;
UnlinkOpenFile(GET_DRIVE(f),f);
SET_OPEN(f,false);
SET_ID(f,0);
#if 0
if(GET_ISDIR(f) && (isdisk == 0 || isdisk == 2)) /* delete directory file */
{
HDelete(mdvVol[GET_DRIVE(f)],mdvDir[GET_DRIVE(f)],NAME_REF(f),isdisk);
}
#endif
/* parte finale della routine : QL Technical Guide pag. 43 */
pdb=PhysicalDefBlock();
d=ReadByte(pdb+0x22);
WriteByte(pdb+0x22,d-1); /* decrement number of open files */
(*aReg)+=0x18;
aReg[1]=0x28140;
QLvector(0xd4,20000l); /* unlink file from list */
(*aReg)-=0x18;
QLvector(0xc2,20000l); /* release channel block memory */
rts();
}
void MdvSlaving(void)
{
if((Ptr)gPC-(Ptr)theROM-2 != 0x14006l)
{
exception=4;
extraFlag=true;
nInst2=nInst;
nInst=0;
return;
}
rts();
}
void MdvFormat(void)
{
w8 drive;
short nameLen;
long total,empty;
int filesys;
if((Ptr)gPC-(Ptr)theROM-2 != 0x14008l)
{
exception=4;
extraFlag=true;
nInst2=nInst;
nInst=0;
return;
}
#if 1
*reg=QERR_NI;
#else
if(mdvOn) *reg=-9; /* in use */
else
{
drive=(w8)reg[1]; /* drive number */
if(drive<1 || drive>2) *reg=-7; /* not found */
else
{
filesys=1;drive--;
if(qdevs[filesys].Present[drive] && qdevs[filesys].OpenFiles[drive]==0)
{
w32 a6;
if(!qdevs[filesys].Where[drive]) NoteAlert(rFormat,nil);
/* set medium name */
nameLen=ReadWord(aReg[1])-5;
if(nameLen>255) nameLen=255;
else if(nameLen<0) nameLen=0;
flpName[drive][0]=nameLen;
if(nameLen>0) BlockMoveData((Ptr)theROM+aReg[1]+7,&(flpName[drive][1]),nameLen);
if(nameLen>10) nameLen=10;
if(nameLen>0) BlockMoveData((Ptr)theROM+aReg[1]+7,mdvHeaders+14*drive+2,nameLen);
while(nameLen<10) mdvHeaders[14*drive+2+nameLen++]=' ';
/* set header flag, sector and random number */
mdvHeaders[drive*14]=0xff;
mdvHeaders[drive*14+1]=0;
a6=0x28000;
mdvHeaders[drive*14+12]=*((uw8*)theROM+a6+0x2e);
mdvHeaders[drive*14+13]=*((uw8*)theROM+a6+0x2f);
/* set number of total/good sectors */
*reg=0;
if(qdevs[filesys].Where[drive]) QDiskFormat(mdvHeaders+14*drive+2,&total,&empty);
else
*reg= QERR_NI;
if(*reg==0)
{
reg[1]=empty;
if(reg[1]>30000) reg[1]=30000;
reg[2]=total;
if(reg[2]>30000) reg[2]=30000;
} else qdevs[filesys].Present[drive]=false;
/* InvalWindow(mdvWindow); */
}
else
{
if(qdevs[filesys].OpenFiles[drive]!=0) *reg=-9; /* in use */
else *reg=-14; /* format failed */
}
drive++;
}
}
#endif
rts();
}