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support up to LASTDRIVE=32 (lDOS or patched MS-DOS v7) #180

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Merged
PerditionC merged 1 commit into from
Sep 27, 2025
Merged

support up to LASTDRIVE=32 (lDOS or patched MS-DOS v7) #180

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10 changes: 9 additions & 1 deletion shell/command.c
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Original file line number Diff line number Diff line change
Expand Up @@ -159,6 +159,14 @@ char switchar(void)
}
#endif

unsigned isdrive(unsigned char cc) {
if (isalpha(cc))
return 1;
if ((cc - 'A') < 32)
return 1;
return 0;
}

void execute(char *first, char *rest, int lh_lf)
{
/*
Expand All @@ -177,7 +185,7 @@ void execute(char *first, char *rest, int lh_lf)
assert(rest);

/* check for a drive change (not for loadhigh/loadfix) */
if (!lh_lf && (strcmp(first + 1, ":") == 0) && isalpha(*first))
if (!lh_lf && (strcmp(first + 1, ":") == 0) && isdrive(*first))
{
changeDrive(*first);
return;
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6 changes: 3 additions & 3 deletions suppl/src/dfnpath.c
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Original file line number Diff line number Diff line change
Expand Up @@ -75,9 +75,9 @@ char *dfnpath(int drive)
DBG_ENTER("dfnpath", Suppl_dfn)
DBG_ARGUMENTS( ("drive=%u ('%c')", drive, drive < 32? '.': drive) )

if(isupper(drive)) drive -= 'A' - 1;
else if(islower(drive)) drive -= 'a' - 1;
else if((unsigned)drive > 32) {
if (islower(drive)) drive -= 'a' - 'A';
if (drive >= 'A') drive -= 'A' - 1;
if ((unsigned)drive > 32) {
eno_set( ENODEV);
DBG_RETURN_S( 0)
}
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