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Format of MS-DOS/PC-DOS/OS2/WinNT/PTS-DOS COUNTRY.SYS country-subfunc data

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Offset

Size

Description

00h

BYTE

ID-tag (FFh)

01h

7 BYTEs

table-type signature (blank-padded)

"CTYINFO"	general country info (subfn 01h)
"UCASE "	uppercase table (subfn 02h)
"LCASE "	lowercase table (subfn 03h) (DOS 6.2_)
"FUCASE "	filename uppercase table (subfn 04h)
"FCHAR "	filename terminator table (subfn 05h)
"COLLATE"	collating sequence (subfn 06h)
"DBCS "	double-byte character table (subfn 07h)

08h

WORD

length of following table in bytes (if 0000h for DBCS table, there will still be a word of 0000h)

---country info (01h)---

0Ah

WORD

country ID (see #01400 at AH=38h)

0Ch

WORD

code page (see #01757)

0Eh

34 BYTEs

country-dependent info (see #01399 at AH=38h)

---uppercase table (02h)---

0Ah

128 BYTEs

uppercase equivalents (if any) of chars 80h to FFh

---lowercase table (03h)---

0Ah

256 BYTEs

lowercase equivalents (if any) of chars 00h to FFh

---filename uppercase table (04h)---

0Ah

128 BYTEs

uppercase equivalents (if any) of chars 80h to FFh

---filename terminator table (05h)---

0Ah

BYTE

??? (01h for MS-DOS 3.30-6.00)

0Bh

BYTE

lowest permissible character value for filename

0Ch

BYTE

highest permissible character value for filename

0Dh

BYTE

??? (00h for MS-DOS 3.30-6.00)

0Eh

BYTE

first excluded character in range

all characters in this range are illegal

0Fh

BYTE

last excluded character in range

10h

BYTE

??? (02h for MS-DOS 3.30-6.00)

11h

BYTE

number of illegal (terminator) characters

12h

N BYTEs

characters which terminate a filename: ."/\[]:|<>+=;,

---collating sequence (06h)---

0Ah

256 BYTEs

values used to sort characters 00h to FFh

---DBCS table (07h)---

0Ah

2N BYTEs

start/end for N lead byte ranges

WORD

0000h (end of table)