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1.1       root        1: .\" Copyright (c) 1990 The Regents of the University of California.
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                      4: .\" This code is derived from software contributed to Berkeley by
                      5: .\" the Systems Programming Group of the University of Utah Computer
                      6: .\" Science Department.
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                     22: .\"    @(#)ite.4       5.1 (Berkeley) 6/29/90
                     23: .\"
                     24: .TH ITE 4 "June 29, 1990"
                     25: .UC 7
                     26: .SH NAME
                     27: ite \- HP Internal Terminal Emulator
                     28: .SH DESCRIPTION
                     29: TTY special files of the form ``ttye?''
                     30: are interfaces to the HP ITE for bit-mapped displays as implemented under BSD.
                     31: An ITE is the main system console on most HP300 workstations and
                     32: is the mechanism through which a user communicates with the machine.
                     33: If more than one display exists on a system,
                     34: any or all can be used as ITEs with the limitation that only the first
                     35: one opened will have a keyboard (since only one keyboard is supported).
                     36: .PP
                     37: ITE devices use the HP-UX ``300h''
                     38: .IR termcap (5)
                     39: or
                     40: .I terminfo
                     41: entries.
                     42: However, as currently implemented,
                     43: the ITE does not support the full range of HP-UX capabilities for this device.
                     44: Missing are multiple colors, underlining, blinking, softkeys,
                     45: programmable tabs, scrolling memory and keyboard arrow keys.
                     46: The keyboard does not have any of the international character
                     47: support of HP's NLS system.
                     48: It does use the left and right
                     49: .I "extend char"
                     50: keys as meta keys, in that it will set the eighth bit of the character code.
                     51: .PP
                     52: Upon booting, the kernel will first look for an ITE device
                     53: to use as the system console (/dev/console).
                     54: If a display exists at any hardware address, it will be the console.
                     55: The kernel looks for, in order:
                     56: a 98544, 98545, or 98547 Topcat display,
                     57: a 98700 Gatorbox at a supported address (see
                     58: .IR gb (4)),
                     59: or a 98720 Renaissance at a supported address (see
                     60: .IR rb (4)).
                     61: Currently there is no ITE support for the
                     62: 98548, 98549, 98550 and 98556 boards.
                     63: .PP
                     64: When activated as an ITE (special file opened),
                     65: all displays go through a standard initialization sequence.
                     66: The frame buffer is cleared,
                     67: the ROM fonts are unpacked and loaded into off-screen storage and
                     68: a cursor appears.
                     69: The ITE initialization routine also sets the colormap entry used to white.
                     70: Variable colors are not used, mainly for reasons of simplicity.
                     71: The font pixels are all set to 0xff and the colormap entry corresponding
                     72: to all planes is set to R=255, G=255 and B=255.
                     73: The actual number of planes used to display the characters depends
                     74: on the hardware installed.
                     75: Finally, if the keyboard HIL device is not already assigned to another
                     76: ITE device, it is placed in ``cooked'' mode and assigned to this ITE.
                     77: .PP
                     78: On most systems,
                     79: a display is used both as an ITE (/dev/ttye? aka /dev/console)
                     80: and as a graphics device (/dev/grf?).
                     81: In this environment,
                     82: there is some interaction between the two uses that should be noted.
                     83: For example, opening /dev/grf0 will deactivate the ITE,
                     84: that is, write over whatever may be on the ITE display.
                     85: When the graphics application is finished and /dev/grf0 closed,
                     86: the ITE will be reinitialized with the frame buffer cleared
                     87: and the ITE colormap installed.
                     88: .SH SEE ALSO
                     89: grf(4), hil(4), gb(4), rb(4), tc(4)
                     90: .SH DIAGNOSTICS
                     91: None under BSD.

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