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    M i n e r v a   S o f t w a r e   T e c h n i c a l   R e l e a s e

   Number: 018/AncPr                                      Baring Crescent
   Date:   27/04/93                                                Exeter
   Author: MK                                                       Devon
   Pages:  01                                                     EX1 1TL

                       Ancestry printer compatability
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Ancestry can perform sideways printouts on Epson compatable printers in one
of three modes. To decide if a particular printer is compatable with Ancestry
you should discover whether or not it can execute the commands indicated
below. Although many printers are billed as 'Epson Compatable' this term has
a wide range of different interpretations depending on the manufacturer. To
be certain, check that the printer can execute all the commands in at least
one of the groups below:

1) Medium size, no download characters
   This mode uses a low res graphics dump which should be supported by most
   printers. The commands used are as follows:

     ESC @ (27,64) Reset printer
     ESC K (27,75) Standard density graphics
     ESC A (27,65) Line spacing

2) Small size, no download characters
   This mode uses a higher res graphics dump to fit more cards on each page.
   The commands used are as follows:

     ESC @ (27,64) Reset printer
     ESK L (27,76) Double density graphics
     ESC A (27,65) Line spacing

3) Download characters
   This mode redefines the printers character set to obtain the best quality
   and offer a range of sizes. The printer will need to have enough RAM to
   redefine the entire character set and will possibly need a switch setting
   altered to make this RAM available for character definitions. It will also
   need to support the following codes:

     ESC @ (27,64) Reset printer
     ESC 3 (27,51) Line spacing
     ESC ! (27,33) Character size
     ESC U (27,85) Unidirectional printing
     ESC 6 (27,54) Expand printable code area
     ESC I (27,73) Control code printable
     ESC : (27,58) Copy ROM characters to RAM
     ESC % (27,37) Select download RAM
     ESC & (27,38) Download character
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