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-
- ZCPR3 Z3TCAP (MYTERM.Z3T) file to source code (MYTERM.Z80)
- generator.
-
- Program Name: TCSRC
- Author: Terry Hazen
- Version: 1.3
- Date: 07 May 90
-
-
- Since it is difficult to extensively customize an existing
- Z3TCAP.Z3T file by patching alone, TCSRC was written to help the
- user customize his Z3TCAP by creating a commented source code
- file (MYTERM.Z80) from an existing MYTERM.Z3T file for his
- terminal, such as one extracted from Z3TCAP.TCP by TCSEL, or from
- the current Z3TCAP located in memory in the ZCPR3 environment.
- TCSRC also allows you to create a blank commented Z3TCAP source
- code file when you want to start from scratch. The new source
- code file can then be edited as desired, assembled to MYTERM.COM
- and renamed to MYTERM.Z3T. It can then be loaded to your
- environment using LDR.COM, NZCOM.COM, JETLDR.COM, etc.
-
- TCSRC generates Z3TCAP commented source code based on the Z3TCAP
- definition contained in VLIB4D. VLIB4D modifies the sequence of
- control strings in the extended Z3TCAP over that specified by
- earlier VLIB4 beta releases to bring all the terminal control
- strings into a common area located prior to the graphics area,
- reduces the length of the terminal name to 13 bytes and adds a
- byte defining the offset of the graphics area from the start of
- the Z3TCAP.
-
- TCSRC expects input files to be subsets of the VLIB4D standard,
- such as standard Z3TCAP files. Consult the current VLIB4 help
- files for explanations of each of the defined terminal functions
- and consult your terminal manual for information on the terminal
- control strings required to implement the terminal functions for
- your terminal.
-
- Source code generated by TCSRC from earlier extended Z3TCAP files
- with different extended formats will begin to be incorrect when
- the sequence of control strings begins to differ from the new
- VLIB4D standard and will have to be corrected with a text editor.
- Lines of source code defining terminal control strings may simply
- be moved into the correct order, ignoring both comments and
- labels (except for GOELD, which is used to define the graphics
- area offset), as the corrected source code file can be assembled
- to a COM file and TCSRC can then be used again to quickly
- generate a new, correctly commented source code file.
-
-
- Syntax
- ------
-
- TCSRC [dir:]infile[.z3t] [[dir:]outfile[.z80]]
-
- Special infile names:
- 'Z3ENV' creates source code file from the Z3TCAP in the
- environment.
- 'BLANK' creates blank commented source code file.
-
- Default outfile is infile.Z80 on default directory. Any
- existing R/W file of the same name will be overwritten.
-
-
- Graphics TCAP Offset
- --------------------
-
- VLIB4D defines a graphics offset byte at GOFF (Z3TCAP+12), which
- contains the offset from the start of the Z3TCAP to the start of
- the graphics area at GEOLD, to allow the future addition of
- terminal control strings in the terminal control string area
- without requiring rewritting of the VLIB graphics routines using
- the graphics data. To compensate for the addition of the
- graphics offset byte, the length of the terminal name area has
- been reduced to 13 bytes.
-
-
- Terminal Configuration Bytes
- ----------------------------
-
- VLIB4D defines two terminal configuration bytes at B14
- (Z3TCAP+14) and B15 (Z3TCAP+15) to allow an application program
- access to terminal characteristics not otherwise specified in the
- Z3TCAP. Application programs such as WordStar and SCAN now have
- access to information not only about terminal control strings,
- but about how users have configured their terminals. Users can
- set configuration bits indicating, for example, whether or not
- their terminals are set to auto-wrap at the end of a line or
- auto-scroll at the end of a screen, whether their terminals use
- ANSI or ASCII control sequences, and whether they use reverse
- video or non-reverse (usually dim) video for their standout mode.
- Not all application aprograms will check the terminal
- configuration bytes, but their presence allows the user some
- control over how application programs configure his screen
- display.
-
- SCAN, for example, checks the auto-wrap and auto-scroll bits to
- see whether it can put characters in the last display column on
- the screen without causing additional blank lines to be inserted
- into the display. If both bits are 0, the last column is
- considered safe, and the whole screen can be used for the
- display. If either bit is set, the last column is considered
- reserved and the next-to-last column will be the final column
- used. So if your terminal is configured to not automatically
- wrap or scroll, you can set the bits accordingly and SCAN will
- use the whole screen. Joe Wright's WSPAT for WordStar4 uses the
- configuration bytes in a similar way, along with the set
- attribute string to create WS4 display screens.
-
-
- Screen Display Configuration
- ----------------------------
-
- When you start looking at how many ways a given terminal can be
- configured by a user and how that configuration can affect screen
- displays, it quickly becomes clear that a standard Z3TCAP for a
- given terminal type is not adequate to convey more than basic
- standard information for that terminal. It may make a difference
- to a screen display intensive applications program, for example,
- whether a screen is configured as dark letters on a light screen
- or light letters on a dark screen and whether reverse video or a
- non-reverse video mode, such as dim or bold is used as standout.
- For example, if dim is used as standout mode on a dark screen,
- spaces in standout mode won't show up, but if reverse video is
- used, they will, creating quite a different display.
-
- If the Z3TCAP for a particular terminal specifies dim as the
- standout mode, but the user prefers to use bold, reserving dim
- for standard mode, but then wishes to exit to a normal video
- command line, he must customize his Z3TCAP to use SO (Start
- Standout), SE (End Standout), TI (Terminal Initialization) and TE
- (Terminal Deinitialization) to set his terminal according to his
- preferences. In this example, SO would set dim, SE would set
- normal, TI would set dim, and TE would set normal video.
-
- Still another user of the same terminal type might prefer half
- intensity for standout, and would need to customize his Z3TCAP
- accordingly. So many terminal characteristics may be user
- configured, in fact, that it is really the user's responsibility
- to create a customized Z3TCAP for his system that reflects his
- own preferences. TCSRC attempts to facilitate this process by
- providing the user a handy tool to quickly create Z3TCAP source
- code files that may be easily edited and used to create his
- working customized Z3TCAP.
-
-
- Extended Z3TCAP Terminal Control Sequences
- ------------------------------------------
-
- The source code created by TCSRC includes the LD (delete line at
- cursor position) and LI (insert line at cursor position)
- sequences added in the extended Z3TCAP defined by VLIB4B.
- Applications such as WordStar and SCAN can use these control
- sequences to produce better displays.
-
- For screen display intensive applications such as WordStar 4.0
- patch WSPAT, Joe Wright added a macro to the Z3TCAP and a routine
- in VLIB4C to set terminal display attributes. The source code
- created by TCSRC includes the SA (set Attributes) macro and AT
- (the attribute string).
-
- The source code created by TCSRC also includes a CD (clear screen
- from cursor to end-of-screen) sequence. While sequence is, in
- some cases, a duplication of part of the CL (Home Cursor and
- Clear Screen) sequence, it is now available as a separate control
- sequence.
-
-
- Other New VLIB4D Terminal Control Sequences
- -------------------------------------------
-
- For use with windowing routines used in pull-down menus, the
- extended Z3TCAP includes a new RC sequence that reads the
- character at the current cursor position and a RL sequence that
- reads the entire line up until the cursor position into a buffer.
- Consult V4LIBD.HLP for more information.
-
-
- Graphics Extensions
- -------------------
-
- VLIB4D adds a new standardized character graphics area beginning
- at GOELD (graphics on/off delay). Graphics extensions include
- GO/GE (graphics mode on and off), and CDO/GDE (turn the cursor
- off and on).
-
-
- Graphics Characters
- -------------------
-
- Graphics characters used by VLIB4D are one-byte characters that
- produce lines, intersections and corners as well as full and
- hashed blocks. For terminals without graphics capability, very
- good results can be obtained using the characters '-' and '|' for
- horizontal (GHL) and vertical (GVL) line characters. The
- characters '*' and '#' can be used for full (GFB) and hashed
- (GHB) blocks, the characters '+' or '*' can be used for corners
- and the character '+' for intersections.
-
- Use TCSRC to add graphics characters to your own Z3TCAP and try
- BOX.COM from VLIB4D for a demonstration of the new line graphics
- as used in a box drawing routine.
-