debugged program's data segment:
@smallexample
-(@value{GDBP}) info dos ldt $ds
-0x13f: base=0x11970000 limit=0x0009ffff 32-Bit Data (Read/Write, Exp-up)
+@exdent @code{(@value{GDBP}) info dos ldt $ds}
+@exdent @code{0x13f: base=0x11970000 limit=0x0009ffff 32-Bit Data (Read/Write, Exp-up)}
@end smallexample
@noindent
means display entries from a single Page Table, the one pointed to by
the specified entry in the Page Directory.
+@cindex direct memory access (DMA) on MS-DOS
These commands are useful when your program uses @dfn{DMA} (Direct
Memory Access), which needs physical addresses to program the DMA
controller.
These commands are supported only with some DPMI servers.
@cindex physical address from linear address
-@item info dos address-pte
+@item info dos address-pte @var{addr}
This command displays the Page Table entry for a specified linear
-address. The argument linear address should already have the
+address. The argument linear address @var{addr} should already have the
appropriate segment's base address added to it, because this command
accepts addresses which may belong to @emph{any} segment. For
example, here's how to display the Page Table entry for the page where
the variable @code{i} is stored:
-@smallexample
-(@value{GDBP}) info dos address-pte __djgpp_base_address + (char *)&i
-Page Table entry for address 0x11a00d30:
-Base=0x02698000 Dirty Acc. Not-Cached Write-Back Usr Read-Write +0xd30
+@smallexample
+@exdent @code{(@value{GDBP}) info dos address-pte __djgpp_base_address + (char *)&i}
+@exdent @code{Page Table entry for address 0x11a00d30:}
+@exdent @code{Base=0x02698000 Dirty Acc. Not-Cached Write-Back Usr Read-Write +0xd30}
@end smallexample
@noindent
transfer buffer:
@smallexample
-(@value{GDBP}) info dos address-pte *((unsigned *)&_go32_info_block + 3)
-Page Table entry for address 0x29110:
-Base=0x00029000 Dirty Acc. Not-Cached Write-Back Usr Read-Write +0x110
+@exdent @code{(@value{GDBP}) info dos address-pte *((unsigned *)&_go32_info_block + 3)}
+@exdent @code{Page Table entry for address 0x29110:}
+@exdent @code{Base=0x00029000 Dirty Acc. Not-Cached Write-Back Usr Read-Write +0x110}
@end smallexample
@noindent