Atari SLM 804 Printer Emulator

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Screenshots - Atari SLM 804 Printer Emulator

Atari SLM 804 Printer Emulator atari screenshot
Atari SLM 804 Printer Emulator atari screenshot
Atari SLM 804 Printer Emulator atari screenshot
Atari SLM 804 Printer Emulator atari screenshot
Atari SLM 804 Printer Emulator atari screenshot
Atari SLM 804 Printer Emulator atari screenshot
Atari SLM 804 Printer Emulator atari screenshot

Information - Atari SLM 804 Printer Emulator

GenrePatch / DriverYear1988
Language[unknown]PublisherAtari (USA)
Developer[n/a]Distributor-
ControlsKeyboard, MouseCountryUSA
Box / InstructionsEnglishSoftwareEnglish
Programmer(s)

Suko, Graig [[Atari Corp.]] / Staugas, Dave

LicenseCommercial
SerialCA400133 002ST TypeST, STe, TT / 2MB
ResolutionMedium / HighNumber of Disks1 / Single Sided / HD Installable
Dumpdownload atari Atari SLM 804 Printer Emulator Download / PastiMIDI
Protection

Instructions - Atari SLM 804 Printer Emulator

___________________________________________
| Atari SLM804 Printer Emulator Version 1.2 |
|    Copyright (c) 1988 Atari Corporation   |
|___________________________________________|






EMULATOR DISK CONTENTS

   The SLM804 Printer Emulator Version 1.2 program disk con-
   tains  the  following  program  and  data  files.  If you
   currently have Version 1.1, you need only  replace  files
   labeled "mod" and install files labeled "new".


   SLM804 Printer Emulator
          AUTO       mod
      1ST_PRNT.DOT
      LIST06LS.FNT   mod
      RAZB10LS.FNT   new   (hand-bolded Razor 10 point)
      RAZI10LS.FNT   new   (hand-italicized Razor 10 point)
      RAZR06LS.FNT   new   (Razor 6 point)
      RAZR10LS.FNT   mod
        README.DOC   new   (this document)
         SDUMP.PRG
      SETUP630.ACC   mod
      SETUP630.PRG   mod
      SETUP630.RSC
        SLM804.HEX
      SPEEDPRN.PRG   new   (fast output for text files)
          TEST.PRG
      TYPE10LS.FNT   mod






SERIAL SELF-TEST FIX

   When in serial mode (print data source is external), Ver-
   sion  1.1  would "bomb" if self-test was attempted.  Ver-
   sion 1.2 has this problem fixed.






LARGE FONTS FIX

   Large fonts (those whose graphics form exceeds 64K) would
   not  bold or italicize correctly in Version 1.1.  This is
   fixed in Version 1.2.   Font  files  may  now  be  up  to
   200,000 bytes in length with a 128-pixel height as a max-
   imum.






LARGE HMI FIX

   When setting large HMI values (using  n),  back-
   space would not use the correct spacing amount.  Only HMI
   values less than 52 work correctly in Version 1.1.   Ver-
   sion  1.2  correctly  backspaces with HMI up to the docu-
   mented maximum of 125.






THICKNESS FIELD FIX

   Fonts to be bolded will hang the Emulator  while  loading
   if  the value in the thickness field (bold amount) in the
   font header is inadvertently set to  zero.   Version  1.2
   will use a default value of three if zero is found there.






PAGE BREAK FIX

   The Emulator preserves the current print position  across
   a  page  break  and no longer performs a logical carriage
   return.






BIT-MAP MODE FIX

   Documentation for the Emulator indicates that the  escape
   sequence       for       bit-map      graphics      print
   (G$hhhhhhhh)  may  optionally  include  the
   dollar  sign  immediately preceding the hex digit string.
   In Version 1.1, "$" will prematurely  exit  bit-map  mode
   without  printing the bit-map.  Version 1.2 tolerates "$"
   correctly.  To be on the safe side,  applications  should
   omit the dollar sign.

   Note:  the Emulator documentation  does  not  make  clear
   what SCALE FACTOR is for bit-map printing and what values
   may be used.  The only acceptable values are 1, 2,  or  4
   and  they define the resolution (300, 150, or 75 dots per
   inch  respectively)  in  which  the  bit-map  image  will
   appear.   Destination  X  and  Y values are always in 300
   dots per inch units, however.






SELF-TEST FORMAT ENHANCEMENT

   Self-test displays all characters  of  all  fonts  loaded
   providing that there is enough room on one page.  Version
   1.1 determines this cut-off point (where there is no more
   room  for  font  characters) based only on one paper size
   (letter-size).  Version 1.2  adjusts this  cut-off  point
   appropriate to any of the 4 paper sizes that can be found
   in the paper cassette.






AUTO-BOOT ESCAPE ENHANCEMENT

   Certain font files with inconsistent  header  information
   (caused  by  file  system corruption, etc.) may crash the
   system when the Emulator is loading fonts.  This  can  be
   very  inconvenient if the Emulator is configured to auto-
   boot on a hard disk.  Version 1.2 looks for  the  depres-
   sion  of  the  left or right  key before each font
   file is loaded and exits  without  installing  itself  if
   that  key  was depressed.  Make certain to wait until the
   screen  lights-up  after  reset  before  depressing   the
    key.






HARDWARE BLIT ENHANCEMENT

   Version 1.1 uses a specially-designed software blit  rou-
   tine  to  "build" the graphics images of text as the page
   is being printed.  Version 1.2 will engage  the  hardware
   blit  to  provide this function if the BLiTTER is present
   in the system.  The advantage of using hardware blits  is
   that  a  higher density of characters can be printed than
   is possible with software blits.  Heavy use of overstrik-
   ing, very small fonts packing the page with large numbers
   of characters, etc. can cause  a  CHAR  DENSITY  OVERLOAD
   error.   When this error occurs, the top part of the page
   appears normal up to  a  certain  horizontal  line  below
   which  appears  an  area  filled  with white space, black
   space, or a repeating pattern.  The threshold where  this
   error occurs is greatly extended when a BLiTTER is avail-
   able to boost blit performance.

   Note:  some BLiTTERs have been found to  cause  a  system
   crash  when  used  simultaneously  with DMA as is done by
   Version 1.2.  If the system crashes  when  printing  with
   the Emulator, try disengaging the BLiTTER via the Desktop
   Options Menu.






SPEED PRINT ENHANCEMENT

   A higher maximum printing speed  is  now  possible  using
   Version  1.2.   The  maximum  print speed for Version 1.1
   appeared to be about five pages per minute.   Of  course,
   this maximum was only possible if the application supply-
   ing the print data was doing so  at  a  reasonably  rapid
   rate.   Dumping  a  file  to the printer from the Desktop
   would perform at this maximum rate.  However, Version 1.2
   has  a  new  feature which provides maximum throughput of
   about eight to nine pages per minute.

   Note:  some restrictions apply to achieve this top speed.
   All the data to be printed must be in RAM at the time the
   SPEED PRINT  code  is  issued.   Reverse  line-feed,
   engaging  fonts  taller or shorter than the current font,
   changing the VMI values, double-sided printing  and  some
   other  Emulator  features  may have unpredictable results
   during speed printing and should be avoided.

   To invoke SPEED PRINT, send  * to the  printer  with
   the  a1  register  pointing to a structure in memory con-
   taining the data to be printed.  The first long  word  of
   this  structure  is a pointer to one byte beyond the last
   character to be printed.  The print  data  itself  should
   follow this end pointer.


      a1 -->   end ptr (long) ---|
                                 |
               print data        |
                         <-------|


   SPEEDPRN.PRG is a rudimentary program that reads  a  file
   into RAM and SPEED PRINTs it using this new feature.






BIT-MAP PRINTING ENHANCEMENT

   The bit-map printing by image number feature was added to
   Version 1.2 since existing word-processors couldn't issue
   the bit-map print command.  Also there  are  difficulties
   for the mere mortal in using the bit-map print feature of
   Version 1.1 that could be overcome with this new  feature
   in Version 1.2.

   The idea here is to load bit-map images from  files  into
   memory,  hook  them up to the Emulator with a linked list
   structure, and  terminate  &  stay  resident.   With  the
   images  residing  in memory arranged in this linked-list,
   they could be easily printed  by  number  with  a  simple
    code sequence from a word processor.

   A simple program is needed to load images,  connect  them
   to  the  linked list of the Emulator and terminate & stay
   resident.  The  program  should  form  the  same  20-byte
   header for each image loaded as is used by the previously
   documented BIT-MAP PRINT    code.   Preceeding  this
   header should be the link pointer which links to the next
   image or 0 to indicate the last in the list.   The  first
   (actually, the 0th) image is connected to the Emulator by
   writing its address to an address  within  the  Emulator.
   The  address  to  write to is found by taking the address
   found in the trap #13 vector (at location $000000B4), and
   subtracting  16  decimal  from  it.   If a long word 0 is
   found there, no images have  previously  been  installed.
   Otherwise,  the value is presumed to be an address of the
   0th image header in the linked list of images.


      ---$B4
      |
      |
      |    .dc.l  LINK POINTER (or 0) -->  NEXT LINK POINTER (or 0) ----
      |    .dc.l  xx                       .dc.l   s_form (bit-map #0) |
      |    .dc.l  xx                       .dc.w   s_xmin              |
      |    .dc.l  xx                       .dc.w   s_ymin              |
      -->  Emulator trap #13 intercept     .dc.w   s_nxln              |
                    .dc.w   b_width             |
                                           .dc.w   b_height            |
                                           .dc.w   d_xmin              |
                                           .dc.w   d_ymin              |
                                           .dc.w   scalefac            |
                                           .dc.b           |
                                                                       |
                                                                       |
                                      NEXT LINK PTR (or 0 etc.) <-------
                                       


   Once the images are  installed  by  a  terminate  &  stay
   resident  program,  they  may be invoked (printed) from a
   word   processor   or   other   application   by    using
   #n[,x,y,s],  where  n  is  an  ASCII string
   equivalent of  the  decimal  image  number.   This  image
   number  corresponds  to  the  order in the linked list of
   images starting with image #0 up to a  maximum  of  image
   #32767.   Optionally,  a  parameter  list  may  follow to
   specify a new X and Y position for the top-left corner of
   the  bit-map  image  as well as a new scale factor "s" to
   override the default values already installed.

   These X and Y values are in laser pixel units of 300 dots
   per  inch  and  the  scale factor may be 1, 2, or 4 only.
   Any parameter (except image number) may be omitted if the
   default value is desired by placing a null string between
   commas.  For example, to print image #4 at the default  X
   position   but   with   a  new  Y  value  of  1250,  send
   #4,,1250.  Regardless  of  whether  or  not
   this  optional  parameter  list  is  used, the  code
   sequence must be terminated by a space character.






 ______________________________________
| *** Atari SLM804 Printer Caveats *** |
|______________________________________|


(1)  If an SLM804 Laser Printer is connected to the ST  Hard
     Disk  (DMA bus) port, then the printer must be powered-
     on in order for  floppy  or  hard  disk  operations  to
     occur.

(2)  For the best print results on an SLM804 Laser  Printer,
     set  up  the application software to maintain a minimum
     half-inch left and right page margin.

Trivia - Atari SLM 804 Printer Emulator

Hardware
Requires Atari SLM804 Laser Printer


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