.\"	$OpenBSD: sti.4,v 1.4 2001/09/06 15:04:34 mpech Exp $
.\"
.\" Copyright (c) 2001 Michael Shalayeff
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"      This product includes software developed by Michael Shalayeff.
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.Dd May 11, 2001
.Dt STI 4
.Os
.Sh NAME
.Nm sti
.Nd HP Standard Text Interface
.Sh SYNOPSIS
.Cd "sti*	at mainbus0 irq ?"
.\" .Cd "sti*	at pci? device ? function ?"
.Cd "wsdisplay*	at sti? console ?"
.Sh DESCRIPTION
The
.Nm
was created by HP to provide uniform frame-buffer access operations
for their 9000/300 and 9000/700 series of workstations.
Implementation consists of a set of functions burnt in to the PROM
on the card and providing the following set of functions (see below
for PROM revision history on functions supported by particular PROM
revision):
.Pp
.Bl -bullet -compact
.It
Initialize graphics.
.It
State management.
.It
Print a character onto the screen using currently selected font.
.It
Copy a region of the frame-buffer to another location.
.It
Self testing.
.It
Exception handling.
.It
Frame-buffer configuration enquiry.
.It
Setting colour-map entry.
.It
DMA parameters.
.It
Flow control.
.It
User timing.
.It
Processing management.
.It
Miscellaneous utility functions.
.El
.Pp
There are two modes for accessing the PROM:
.Dr byte
and
.Dq word
mode.
In
.Dq byte
mode each 4-byte word contains only the low-ordered big-endian
byte of data; i.e., to compose one word of data 4 words should be read
and low-ordered bytes of those should be shifted correspondingly.
In
.Dq word
mode each word contains all 4 bytes of valid data.
.Pp
PROM revision history:
.Bl -tag -width "00.00" -compact
.It 8.02
Original release.
.It 8.03
.Bl -bullet -compact
.It
OSF-extended self test (a.k.a fast).
.It
Restore display.
.El
.It 8.04
.Bl -bullet -compact
.\" global cfg
.\" rename global cfg ext
.\" global cfg ext
.It
Implement
.Nm curr_mon
function.
.\" friendly boot
.\" sti_mem_addr
.\" dd
.\" word mode
.\" num mons
.\" mon tbl
.\" user data
.\" sti mem req
.\" user data size
.\" maxtime
.\" mon tbl desc struct
.\" init_inptr
.\" rename init_inptr_ext
.\" init_inptr_ext
.\" config mon type
.\" cmt change
.\" font unpmv
.\" non text
.It
Implement
.Dq block move .
.\" non-text
.It
Implement
.Dq set colour-map entry .
.Nm
Implement word mode.
.It
Support for multiple monitors.
.It
Support
.Nm user_data
.Nm
space usage.
.It
Support for extra memory.
.It
Support for
.Nm Windows NT (tm) .
.It
Monitor frequency reference.
.It
Early console.
.It
Support added for: PCXL,
.Nm GSC
bus, ROM-less operation.
.El
.It 8.05
.Bl -bullet -compact
.It
Interrupt support.
.It
Report card's power usage.
.It
Birds of Prey.
.It
User interrupts.
.El
.It 8.06
.Bl -bullet -compact
.It
Multiple fonts.
.It
Monitor table descriptor strings.
.It
PCXL2 and PCXU monitor descriptors.
.El
.It 8.08
.Bl -bullet -compact
.It
HP/UX 10 support for Visualize FX
.It
.Nm dma_ctrl
function added.
.It
.Nm flow_ctrl
function added.
.It
.Nm user_timing
function added.
.El
.It 8.09
.Bl -bullet -compact
.It
Addition changes for
.Nm Visualize FX
due to rearchitecture for performance.
.It
.Nm process_mgr
function added.
.El
.It 8.0a
PCXL2 and PCXU dual
.Nm PCI
EPROM map mode, implemented on
.Nm Visualize EG .
.It 8.0b
Support for HP-UX non-implicit locking DMA, implemented on
.Nm Visualize FXE .
.It 8.0c
.Nm sti_util
function added (flashing under HP-UX and other sideband traffic).
.It 8.0d
Colour frame buffer support.
.El
.Sh SEE ALSO
.Xr intro 4 ,
.Xr wsdisplay 4
.Pp
"Standard Text Interface For Graphics Devices",
Revision 8.13, March 1, 2000, Hewlett Packard
.Sh BUGS
Currently none of the font loading, scroll back or screen blanking
is implemented.
.Sh HISTORY
The
.Nm
driver was written by
.An Michael Shalayeff Aq mickey@openbsd.org
for
.Xr hppa 4
port for
.Ox 2.7 .