dmfsp.4

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 4 代码 · 共 44 行

.\" SCCSID: @(#)dmfsp.4	8.1	9/11/90
.\" SCCSID: @(#)dmfsp.4	8.1	9/11/90
.TH dmfsp 4 VAX
.SH Name
dmfsp \- DMF32 serial printer
.SHsyntax
.B "device dmf0 at uba? csr 0160340 flags 0x????"
.br
.ti +0.5i
.B "vector dmfsrint dmfsxint dmfdaint dmfdbint dmfrint dmfxint dmflint"
.SH Description
.NXS "dmf interface" "DMF32 serial printer interface"
.NXR "dmfsp keyword" "DMF32 serial printer interface"
.NXR "DMF32 serial printer interface"
The
.PN dmf
supports a connection to a line printer through the line printer
port of the DMF32.
.PP
Bits
.I 8-15
of the 
.PN flags 
longword are used to specify the number of columns per line on
the line printer.  If 0 is specified, 132 columns are used.
Bits
.I 16-23
are used to specify the number of lines per page.  If 0 is specified, 66
lines are used.
.SH Diagnostics
.B "dmf%d: Line Printer Disconnected"
.br
This message occurs if an open is performed on the printer port when
the DMF32 detects that there is no printer cable connected.
.PP
.B "dmf%d: Printer DMA Error"
.br
A DMA output transfer to the printer failed.
This could be caused by a memory error or an invalid pte (page table entry).
.SH Files
.PN /dev/lp?
.SH See Also
dmf(4), MAKEDEV(8)