Processor Technology Sol-PC, Руководство пользователя

Страница: 124 / 284

PROCESSOR TECHNOLOGY CORPORATION
Sol OPERATING PROCEDURES SECTION VII
VII-16
display on the monitor. Use this type of operation when your Sol works
with an external computer that does not "echo" data back to the Sol.
For full duplex: operation in the terminal mode, set S4-6 to
OFF. Only received data is displayed in full duplex operation. Use
full duplex when Sol's transmitted data need not be displayed. (Note
that transmitted data from the Sol, if echoed back, is displayed as
received data.)
NOTE
If no Baud rate is selected, data will not
be transmitted out of the SDI.
7.5.12 Keyboard
The keyboard is an output device that produces ASCII (American
Standard Code for Information Interchange) encoded data. It is
hardwired to an input port on the Sol and is used for data entry.
ASCII data is interpreted by the Sol as data and/or commands as
determined by the current system monitor program. The monitor program
may be in the personality module, ALS-8, Sol RAM memory or some memory.
7.6 THE KEYBOARD, GENERAL DESCRIPTION
The Sol Terminal Computer has ASCII 96-character keyboard. Its
key arrangment conforms with the QWERTY (standard typewriter) format.
As shown in the photo on page X-26, there are also 12 control keys
(including five basic cursor controls) and seven special function keys.
A 15-key arithmetic pad, available as an option on the Sol-10, is
provided as standard equipment on the Sol-20.
7.6.1 Operating Features
The Sol keyboard features N-key rollover. That is, several
keys can be pressed at the same time without loss of characters or
commands. Key entries, however, are in the order of actual key
closures. (The keyboard circuitry includes a scanning circuit that
prevents simultaneous key operation.)
7.6.2 Keyboard Indicators
Three keys (SHIFT LOCK, UPPER CASE and LOCAL) have indicator
lights to indicate keyboard/terminal status. When any of these keys is
pressed to turn an indicator light on, the light remains on after the
key is released to show that the status persists. Pressing the key
again turns the light out to indicate the change in status.