Micro-print 85
                            for the
                  16 and 48k Sinclair SPECTRUM

Micro-print 85 is an alternative print routine for all SPECTRUM
micros, with a constant choice of 32, 36, 42, 51, 64 or 85 pitch
characters-per-line printing for all the programs into which you
install it.  In effect your display format is optionally revised
from the usual 22 lines of 32 character spaces  into 24 directly
accessible lines of 85 3-bit, 64 4-bit, 51 5-bit, 42  6-bit,  or
36 7-bit wide character positions,  and you can mix the five new
narrower type faces together or  with Micro-printed or  ordinary
Sinclair 32 pitch characters at any location.  Your  ZX  Printer
can be used to Micro-Lprint an individual text string, and there
is an improved COPY command to enable you to select any group of
between 1 and 24 consecutive screen lines for permanent record.

How to use Micro-print in your own Basic programs.
The code is instructed via four Basic variables which  hold  the 
number of characters per line (no) to be used, the line (li) and 
column (co) print is to start at, and  the  temporary  attribute 
(at) to be used. The subject matter to be  Micro-printed  should 
be put into the print-string (p$), following which the  relevant 
RANDOMISE USR command will Micro-print the string  in  it's  new 
reduced-width form at the  screen  location  just  defined.  For 
Micro-Lprint no, co and p$ only are required, and the  selective 
screen COPY is established by setting-up  just  the  first  line
(fl) and last line (ll) of the group to go to the printer.
_-
How to load and 'call' Micro-print in your SPECTRUM.
           16k version                     48k version
Clearing CLEAR              31500                   64268
Loading  LOAD "MP85/16"CODE 31500	     MP85/48 is 64268
M-print  RANDOMISE USR      31796                   64564
M-COPY   RANDOMISE USR      31830                   64598
M-Lprint RANDOMISE USR      31880                   64648 
Saving   SAVE "MP85/16"CODE 31500,1100   MP85/48 is 64268,1100

Here is a simple example program using the 16k code.
10 PAPER 1: INK 7: BORDER 1: CLEAR 31500: LOAD "MP85/16"CODE 
20 LET p$="Enter the world of 'Micro-print'"+CHR$ 0: CLS 
30 LET no=32: LET li=10: LET co=0: LET at=79: GO SUB 110 
4O LET no=36: LET co=2: LET p$=p$+CHR$ 0: GO SUB 110 
50 LET no=42: LET co=5: GO SUB 110
60 LET no=51: LET co=9: GO SUB 110
70 LEt no=64: LET co=15: GO SUB 110
8O LET no=85: LET co=25: G0 SUB 110
90 LET p$="Here is a COPY of just the '36' and '42' type-faced 
   lines from the screen.": RANDOMISE USR 31880
100 LET fl=12: LET ll=14: RANDOMISE USR 31830: STOP 
110 RANDOMISE USR 31796: RETURN

Now here are all the Micro-print operating rules.

1. Number of characters to be Micro-printed per line :
  LET no=32, 36, 42, 51, 64 or 85. Only integers are recognised, 
  complex numbers and/or mistakes will always set no to 85.

2. Line to start Micro-printing on :
  LET li= any integer from 0 to 23. Micro-print will update both
  this variable and co, and return to Basic if li is bigger than
  23. Print proceeds consecutively on the screen,  but  you  can
  put a chr$ 0 into the string to make it start a new line,  ie.
  LET p$ = "ABC" + chr$ 0 + "XYZ" will put the ABC where li and
  co dictate and the XYZ at column 0 of the following line.

3. Column to start Micro-printing at : 
  LET co= any integer from  0  to one less than the value of no.
  If the column value is equal to or bigger than no then li will
  be increased by one and co set to zero, ie. start a new line.

4. Attribute to be set during Micro-printing of the string :
  LET at= any integer from 0 to 255,  which you derive just like
  the ATTR function does in Sinclair Basic - ie. it's the sum of
    ....  1 x the number of the required ink colour (0 to 7)
    plus  8 x the number of the required paper colour (0 to 7)
    plus  64  for bright ink
    plus  128 for flashing print.
  Thus for example: at=56 is black on white, normal, steady.
                    at=79 is white on blue, bright, steady.
                    at=134 is yellow on black, normal, flashing.

5. The character string to be Micro-printed :
  LET p$= "The subject matter to be Micro-printed."  The  string
  can include all normally printable characters,  in TRUE or INV
  form, ie. anything in the code range from 32 to 164. All other
  character codes are ignored except 0 (see li) and 20, which is
  the Sinclair control code for TRUE and INV video changes.

6. Micro-print character size and location :
  When a character is Micro-printed at  a narrower pitch than 32
  per line it's width and screen location are determined by  the
  3, 4, 5, 6  or 7-bit spacing which results from  the 256-pixel
  line length divided by the 'no' value. The SPECTRUM paper/ink/
  bright/flash attributes however can unfortunately only be  set
  in 8-bit (1 byte) increments, ie. always 32 per line.
  Micro-print graphic characters are arranged 4:3 in 7-bit form,
  2:3 in 5-bit and 1:2 in 3-bit whilst the UDG's always lose the
  rightmost 1, 2, 3, 4 or 5 bits.

7. Errors resulting from Micro-print operation :
  If any of the Micro-print routines are called without all  the
  necessary control variables existing, your program will simply
  halt with the standard error message '2 Variable not found.'

Enjoy your programming ! We are always interested to receive any
comments on our software or provide advice wherever we can, your
letters will be welcome and promptly answered. We want you to be
able to enjoy  the  benefit  of  Micro-print  in  all  your  own
programs, but would like to remind you that the code is the sole 
copyright of Myrmidon Software and you  will  therefore  require 
our agreement if you wish to make commercial use of it.  Thanks.

Myrmidon Software, PO Box 2, TADWORTH
Surrey KT2O 7LQ, England. Telephone No. Betchworth 2072 
Micro-print 85 - Version 1.   January  1984.
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Document created by Frode Tennebø, 20070408.