The System Manual of SOL-20 - History of Computers

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PROCESSOR TECHNOLOGY CORPORATION Sol OPERATING PROCEDURES SECTION VII 7.7.10 LOCAL Key/Indicator The LOCAL key internally connects the SDI output to the SDI input and disables serial transmission. No character is displayed. Pressing LOCAL, shifted or unshifted, to turn the indicator light on sets Sol for local operation. Keyboard entries are not transmitted, but they are "looped back" to the SDI input for display. That is, Sol is not on "line". Pressing LOCAL to turn the light off ends local operation. This corresponds to the local/line operation of a TTY. 7.7.11 RETURN Key Pressing RETURN, shifted or unshifted, generates the ASCII carriage return character (0D), which is not displayed, and moves the cursor to the start of the line on which it resided prior to RETURN being depressed. (This is the same action as a TTY carriage return.) RETURN also erases all data in the line to the right of the cursor. 7.7.12 LINE FEED Key Pressing LINE FEED, shifted or unshifted, generates the ASCII line feed character (0A), which is not displayed, and moves the cursor vertically downward one line. (This is the same action as a TTY line feed.) Line feed action does not erase any data in the line to the right of the cursor. 7.7.13 LOAD Key The LOAD key character is displayed, but the key is nonfunctional with CONSOL and SOLOS. The code generated by this key is 8C, and it may be used by a program to meet a specific need. 7.7.14 REPEAT Key The REPEAT key generates no character and is consequently not displayed. Pressing REPEAT, shifted or unshifted, and another key at the same time causes the other key to repeat at an approximate rate of 15 times per second as long as both keys are held down. Pressing REPEAT at the same time as UPPER CASE performs a restart. See Section 7.5.2 on page VII-13. 7.7.15 MODE SELECT Key Pressing this key, shifted or unshifted, generates the code 80 and causes Sol to enter the command mode. 7.7.16 CLEAR Key Pressing CLEAR, shifted or unshifted, erases the entire screen and moves the cursor to its "home" position (upper left corner of the screen). VII-24
PROCESSOR TECHNOLOGY CORPORATION Sol OPERATING PROCEDURES SECTION VII 7.7.17 Cursor Control (HOME CURSOR and Arrows) Keys Five keys control basic cursor movement. They are HOME CURSOR and the four keys with arrows. None are affected by SHIFT status, and none are displayed or transmitted. Pressing HOME CURSOR moves the cursor to its home position--the first character position in the upper left corner of the screen. To move the cursor up, down, left or right, press the applicable "arrow" key. Each time you press a key the cursor moves one unit in the direction you wish--one space horizontally or one line vertically. These keys may be used with REPEAT. The cursor will not move across any margin of the screen with these four keys. 7.8 BASIC OPERATIONS 7.8.1 Switching From Terminal To Command Mode To switch from terminal to command mode, simply press the MODE SELECT key. Sol enters the command mode, issues a prompt character ( > ) and waits for a command input. 7.8.2 Switching From Command To Terminal Mode To switch from command to terminal mode, press UPPER CASE, TERM and RETURN in that order. Sol enters the terminal mode and all keyboard data will be sent to the SDI output and ail data received (including "looped back" data) will appear on the screen. 7.8.3 Entering Commands In The Command Mode The various commands for CONSOL and SOLOS are described in Section IX of this manual and the SOLOS Users' Manual respectively. You can place more than one command on the screen. For each command, use the arrowed cursor control keys to position the cursor at the start of a new line and begin the new command line with a prompt character ( > ). A command is executed when you press the RETURN key, and all characters on the line to the left of the cursor are interpreted as the command. This means that if more than one command line is on the screen, you can execute any one of them as follows: position the cursor with the arrowed cursor control keys to the right of the desired command and press RETURN. Should you make a mistake when entering a command, there are two ways to correct it: (Paragraph 7.8.3 continued on Page VII-26.) VII-25
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Sol SYSTEMS MANUAL, 6200 Hollis Str
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CONTENTS OUTILNE Detailed contents
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VI. LOADING & EXECUTING CUTER (Appl
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