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VISION2 V2.06 & VISION/L V3.0 (reduced feature version)
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| Table of Contents | ||
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Introduction
Vision/L is a terminal emulation software package based for the highly-acclaimed Cambridge Computer Z88 notebook computer.
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Battery operated V21/V22 MODEM
Cellular telephone interface
Memory expansion up to 1Mb for extra file storage
EPROM cartridges for data backup and archiving
Carrying cases
Portable battery operated printer
Mains power supply
Connecting cables
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Installing the ROM
See Fitting & Using the ROM in the "Read me First" Section
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RS-232 Pinouts
See Appendix 3
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Operator Information
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Setup Modes
Vision/L has three set-up modes: A, B and Z. Set-up modes A and B are compatible with and equivalent to those of a standard VT100 terminal. Set-up mode Z has been added to take advantage of the additional features available within Vision/L.
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Setup Mode A
On a VT100 terminal, Set-up Mode A allows the user to modify the tab stops within the currently selected line width. Setup Mode A is implemented in Vision/L with the following features:
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Setting TAB stops
Up to sixteen TAB stops can be set at any position across the screen. Move the cursor to the required column number and press 2. To set the default TAB stop condition, that is TAB stops every eight columns, press -SHIFT-T.
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Clearing TAB stops
All TAB stops can be cleared by pressing 3. Specific TAB stops can be cleared by moving the cursor to the TAB stop and pressing 2.
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Saving settings to a file
The settings from modes A, B and Z can be saved to a file held on RAM.0 by pressing -SHIFT-S. Vision/L creates a file called "VISION2.CNF", if this file does not already exist.
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Recalling settings from a file
The settings from modes A, B and Z can be recalled from a file held on RAM.0 by pressing -SHIFT-W. These settings will be the last saved set, allowing the user to set up the Vision/L emulation to his exact requirements. If the user removes Vision/L from the Z88, as long as the .CNF file held on RAM.0 is left untouched, when Vision/L is re-inserted and run, the correct user settings will be automatically reloaded.
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Recalling default settings
The default settings for modes A, B and Z can be recalled by pressing -SHIFT-D.
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Reset terminal
Pressing 0 causes Vision/L to clear the display and restore all values to the contents of the file "VISION2.CNF" and leave setup mode.
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Setup Mode B
Setup Mode B is implemented with the following features:
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Note: To access the Z88 panel from Vision/L, first press the -INDEX- key, followed by □ key and S. To return to Vision/L, press -ESC- to return to the Index page and then re-select Vision by typing □ and ZV.
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Setup Mode Z
Setup mode Z provides the following features:
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To alter the setting of Break time, move the cursor onto the feature and type in the new setting directly.
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The Keyboard
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Normal'
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Keys
Vision/L provides the full range of alpha, numeric and punctuation keys directly, simply by pressing the appropriate key on the Z88 keyboard. 'Control' keys are obtained by pressing the ◇ key, which acts as 'CTRL', together with the correct alpha key.
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PF Keys
To access a PF key, press the 0 key to bring up the function key display. Then, press the -TAB- key. Note that the legend above numeric keys 1-4 changes to PF 1-4. The required PF key can then be obtained by simply pressing the designated number key.
Note that the PF key display shows additional function keys for VT220 and VT320 terminals. These keys are not available in the VT100 terminal and are not implemented in Vision/L. Codes are only transmitted for the PF keys and '-ESC-', 13S, and 'LF'. All other keys are ignored. Users requiring the full range of function keys should refer to the Ranger Vision-100 package, which is available separately.
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Keypad
The VT100 terminal has an additional set of keys to the right of the main keyboard. This is known as the Auxiliary Keypad and contains the keys listed in the Keypad Key Code table which follows.
In Vision/L, the keypad keys are accessed by pressing ◇, together with the equivalent key on the main keyboard. Thus, the Keypad 'ENTER' key is obtained by pressing ◇ and -ENTER-. Each keypad key has an equivalent on the main keyboard.
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Application Keypad Mode
The Auxiliary Keypad can be set, by commands from the host computer, to perform in one of two modes, namely a Numeric mode and an Application mode. When first invoked, after reset or after restore default, Vision/L sets the auxiliary keypad to numeric mode. The codes that the keys on the Auxiliary Keypad send out when pressed are determined by the mode that the keypad is in.
When Application mode is selected by the host, the word 'APPLICATION' will appear on the right hand side of the Z88 screen above the line and column count display.
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Keypad Key Codes
Key | Keypad Numeric Mode | Keypad Application Mode |
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0 | 0 | ESC O p |
1 | 1 | ESC O q |
2 | 2 | ESC O r |
3 | 3 | ESC O s |
4 | 4 | ESC O t |
5 | 5 | ESC O u |
6 | 6 | ESC O v |
7 | 7 | ESC O w |
8 | 8 | ESC O x |
9 | 9 | ESC O y |
-ENTER- | -ENTER- | ESC O M |
- | - | ESC O m |
, | , | ESC O 1 |
0 | 0 | ESC O n |
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This feature concerns the scan rate on a Cathode Ray Tube and is thus not supported by Vision/L.
Vision/L Commands
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Moving the Window
A number of keyboard commands are used by Vision/L to control which area of the 24 line page maintained in memory is currently displayed on the screen. Thus the screen acts as a window on the whole page. These commands are not sent to the host computer and are acted on by Vision/L immediately.
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The window commands are as follows:
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Window up -SHIFT-⇧
Move the window up the page by 6 lines. If the window is already at the top of the page, this command will be ignored.
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Move the window to the bottom of the page. If the window is already at the bottom of the page, this command will be ignored.
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Clear the screen ◇VN
Clear the screen and place the cursor on the first character position of the first line.
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Capture File ◇VC
There are a number of additional commands for file capture and transmission. These are fully detailed in the FILE TRANSFER section.
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To display full 80 character lines in PipeDream, enter the Z88 panel by typing □S. Select 'Map size' using the cursor keys and enter '40'. Return to PipeDream by pressing -ESC-. On returning to PipeDream, expand the screen area by holding down the □ key and repeatedly typing ⇨ to expand the right margin until the full 80 character line is visible.
6.0 FILE TRANSFER
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File Transfer
The Filing System
In order to be able to make full use of the file transfer commands in Vision/L it is necessary for the user to have some understanding of the way in which the Z88 stores files and, in particular, where it the stores files.
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Vision/L is able to transfer files out of the Z88 to the host computer and to capture files sent by the host computer to the Vision/L screen. There are significant differences in the way that these two functions are performed. When transmitting a file, Vision/L will send the file to the host without changing the format or order of any part of the file. As far as the host is concerned, it appears as though the user is typing on the Vision/L keyboard. When receiving a file, Vision/L interprets all the escape codes sent by the host computer and writes any necessary characters to the file to duplicate the effect of the escape sequences.
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Transmit a file ◇VT
This command is used to transmit a file from the memory of the Z88 to the host computer. The file may be present on any of the Z88 devices or directories but it is not possible to send a file directly from another application running on the Z88. Thus, for example, if a document has been created in PipeDream and it is required to send it to a host computer, it will be necessary to save the file from PipeDream and then enter Vision/L to transmit the file.
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A problem that may be encountered with certain hosts is that the host receive buffer may overflow during file transfer resulting in missing characters in the received file. This may occur because the host has been configured to expect manual typing speeds, rather than electronic transfer. In such cases, handshaking is often not provided for input data. The solution is to reconfigure the host input buffer so that Xon/Xoff protocol is enabled, allowing error free data transfer.
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Capture a file ◇VC
File capture can be initiated from the menu or by pressing ◇VC. For general details regarding the use of menus and help, refer to a previous section.
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If Vision/L detects that the device that has been used for the capture file has become full during the capture process, it will close the capture file and issue a warning to that effect. If the user wishes to continue capturing information, he should enter the Filer and either change devices or erase unwanted files on the current device in order to create more room. Once this has been completed, capture can be re-started, either by adding new information to the existing capture file or by choosing a different name for the capture file.
Quit capture Code
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◇VQ
Quit capture stops the capturing of information from the screen and also closes the capture file.
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