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<TITLE>Int 45
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Int 45 - Acorn BBC Master 512 - OSFILE - READ/WRITE FILE OR DIRECTORY INFO -
AL = function
00h save block of memory as file
01h update directory entry for existing file
02h set load address for existing file
03h set execution address for existing file
04h set attributes for existing file
05h read directory
06h delete file
FFh load file
DS:BX - control block (see #03201)
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<h2>Int 45
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<h3><font color=#C00040>Acorn BBC Master 512 - OSFILE - READ/WRITE FILE OR DIRECTORY INFO</font></h3>
<PRE>
AL = function
00h save block of memory as file
01h update directory entry for existing file
02h set load address for existing file
03h set execution address for existing file
04h set attributes for existing file
05h read directory
06h delete file
FFh load file
DS:BX -> control block <a href="rb-6183.htm#Table3201" tppabs="http://www.ctyme.com/intr/rb-6183.htm#Table3201">(see #03201)</a><br>
<p><b>Return:</b><br>FLAGS destroyed
AL = file type
00h not found
01h file found
02h directory found
FFh protected file
</PRE>
<p><b>See Also:</b>
<a href="rb-6133.htm" tppabs="http://www.ctyme.com/intr/rb-6133.htm">INT 40"Acorn"</a> - <a href="rb-6138.htm" tppabs="http://www.ctyme.com/intr/rb-6138.htm">INT 41"Acorn"</a> - <a href="rb-6180.htm" tppabs="http://www.ctyme.com/intr/rb-6180.htm">INT 44"Acorn"</a> - <a href="rb-6187.htm" tppabs="http://www.ctyme.com/intr/rb-6187.htm"
<PRE>
<p>
Format of BBC Master control block:
<a name=table3201></a>
Offset Size Description (Table 03201)
00h WORD address of CR-terminated filename
02h DWORD load address of file
06h DWORD execution address of file
0Ah DWORD start address of data to save
0Eh DWORD end address of data to save, or file attributes
file attributes in low byte <a href="rb-6183.htm#Table3202" tppabs="http://www.ctyme.com/intr/rb-6183.htm#Table3202">(see #03202)</a>
other three bytes are filing-system specific file attributes
<p>
Bitfields for BBC Master file attributes:
<a name=table3202></a>
Bit(s) Description (Table 03202)
0 no owner read access
1 no owner write access
2 not executable by owner
3 not deletable by owner
4 no public read access
5 no public write access
6 not executable with public access
7 not deletable with public access
</PRE>
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