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- LCS.COM
-
- Size (recs) CRC Version Author/Latest Issue Disk
- 11k (86) 3941 1.0 Gene Pizzetta 10/91 Z3COM11
-
- 1- Syntax 2- Fonts 3- Notes
-
-
- LCS is a ZCPR3 utility that loads character sets to Wyse 60 and Televideo
- 965 terminals. Included are a Roman font that is similar to that used on
- MS-DOS machines and a Courier font that is somewhat easier to read than the
- native font. Provision has been made for a user-defined font for those who
- want to design their own.
- :1
- Syntax LCS {{/}font}
-
- Before use LCS must be configured for either Wyse or Televideo terminals.
- For Televideo terminals, which lack a hash block for extended TCAP's, LCS can
- also be configured to automatically load hashed block to replace the weird-
- looking graphic cross character. The hashed block can be accessed as charac-
- ter 92h in 8-bit mode, or as 7-bit graphics character "R". Two types of
- hashed blocks are available; try them both to see which you prefer.
-
- Configuration is accomplished using ZCNFG and the accompanying LCSnn.CFG
- file.
- :2
- Available Fonts - 1/2
-
- A leading slash is permissible, but not required.
-
- C Courier. This font is similar to the native font, but
- some of the characters are more open and easier to
- read. Zeroes are slashed.
-
- R Roman. This font is similar to fonts commonly used on
- MS-DOS machines. If you regularly move between MS-DOS
- and ZCPR3, this font might ease the transition.
-
- M Roman (same as R). This option is provided in case you
- think "MS-DOS".
-
- I Roman (same as R). This option is provided in case you
- think "IBM".
-
- U User defined. This selection allows users to design
- their own custom font (see below). As distributed, it
- merely loads a slight variation on the Courier font.
- Available Fonts - 2/2
-
- N Native. Returns the terminal to its native font.
-
- Although LCS is a Z-System utility, it should run fine without ZCPR3. The
- only difference will be that the program's disk name will not be used on
- syntax line of the usage screen.
-
- This program may work on other terminals that emulate Wyse or Televideo,
- but I haven't tested that so there are no guarantees. The only difference
- between the Wyse and Televideo configurations of LCS is the lead-in string.
- For Wyse terminals the lead-in is ESC, "cA0". For Televideo the lead-in is
- ESC, "xA0".
- Custom Fonts - 1/3
-
- Designing a font is a tedious process, but if you've got the fortitude,
- here's how you can implement a user-defined character set.
-
- Each line of a font definition in the source code is concerned with a
- single character. As an example, we will use the upper-case "A". The source
- code line is as follows:
-
- db '41003844828282FE828282828200000000',CtrlY,0 ; A
-
- The lead-in string is sent automatically by LCS, so we won't concern our-
- selves with that. Each pair of numbers in the quoted string represents a byte
- in hexadecimal. Here's how the source code line breaks down:
-
- 41 The first pair of digits is the ASCII value of the
- character in hexadecimal. In this case the upper-case
- "A" is ASCII 041h.
-
- 00 Sixteen pairs of digits representing the 16 scan lines
- 38 used by each character. Each pair is the hexadecimal
- 44 value for a one-byte bit map, with 1 bits representing
- Custom Fonts - 2/3
-
- 82 lit pixels and 0 bits representing dark pixels.
- 82
- 82 = 1 0 0 0 0 0 1 0
- FE = 1 1 1 1 1 1 1 0
- 82
- 82 Bit 0 (on the far right) should never be 1 because it
- 82 is reserved for graphic characters. Setting bit 0 to
- 82 a 1 will cause the two character separator pixels (not
- 82 part of the bit map) to also be lit, which is not what
- 00 one would ordinarily want. For the same reason, scan
- 00 lines 1 and 16 should ordinarily be "00". Your charac-
- 00 ters should be restricted to 7 by 14 pixels.
- 00
-
- CtrlY A ^Y tells the terminal that we have reached the end of
- the character definition.
-
- 0 A final null terminates a line of characters that will
- be sent to the terminal after each lead-in string is
- sent.
- Custom Fonts - 3/3
-
- At the end of the table, a line that contains only a null:
- db 0
- tells LCS that it has reached the end of a font definition.
-
- Note that the example above is based on Joe Wright's original Courier font
- (the default user-defined font), which has the top of upper-case characters at
- scan line 2 and decenders beginning at scan line 13:
- db '41003844828282FE828282828200000000',CtrlY,0 ; A (user)
- The remaining fonts (including the native font) top out at scan line 3 with
- decenders beginning at scan line 14:
- db '4100003844828282FE8282828282000000',CtrlY,0 ; A (Courier)
- db '410000386CC6C6C6FEC6C6C6C6C6000000',CtrlY,0 ; A (Roman)
- A very few Roman characters extend beyond these limits.
- :3
- Notes
-
- a. Vs 1.0 (10/03/91, Gene Pizzetta):
- - Initial release.
- - Courier font is modified from one "borrowed" from Joe Wright. User
- font is basically a duplicate of Courier.