These are the print commands for the C. Itoh Prowriter 8510 printer.
Many Atari programs are set up for the Prowriter as well as the Epson,
because it is a popular printer among Atari owners. Some programs do not
support the Prowriter and this seems to mainly be because the programmer
doesn't have access to the codes for it. To try and help, I have typed these
from the Printer manual. I hope they help.
                           Tom Dewar   72777,3102

                                              GENERAL FORMAT
COMMAND             DESCRIPTION               BASIC FORMAT

Carriage Return     Returns carriage to       CR
                    left position             CHR$(13)

Line Feed           Moves paper up one        LF
                    line                      CHR$(10)

Form Feed           Advances paper one        FF
(Top of Form)       full page length          CHR$(12)
                    from present position

Back Space          Moves the print head      BS
                    back one space            CHR$(08)

Set Tabs            Sets a tab at each        ESC ( ,a,b,c.
                    column designated         CHR$(27);CHR$(40);
                                                "a,b,c."

Clear Tabs          Clears tab at each        ESC ) ,a,b,c.
                    column designated         CHR$(27);CHR$(41);
                                                "a,b,c."

Clear All Tabs      Clears all tabs           ESC 0
                                              CHR$(27);CHR$(48)

Horizontal Tab      Sets Carriage to          HT
                    next tab position         CHR$(09)

Pica Pitch          Sets 10 cpi pica          ESC N
                    pitch (640 dpl, 80 dpi)   CHR$(27);CHR$(78)

Elite Pitch         Sets 12 cpi elite         ESC E
                    pitch (768 dpl, 96 dpi)   CHR$(27);CHR$(69)

Compressed Pitch    Sets 17 cpi (1088 dpl)    ESC Q
                    compressed pitch(136 dpi) CHR$(27);CHR$(81)

Proportional        Selects Proportional      ESC P
                    Mode  (1280 dpl, 160 dpi) CHR$(27);CHR$(80)

Elongated           Sets elongated            SO
Character Select    character mode            CHR$(14)

Elongated           Clears elongated          SI
Character Clear     character mode            CHR$(15)

Boldface Select     Sets boldface             ESC !
                    type mode                 CHR$(27);CHR$(33)

Boldface Clear      Clears boldface           ESC "
                    type mode                 CHR$(27);CHR$(34)

Underline Select    Selects underlined        ESC X
                    text mode                 CHR$(27);CHR$(88)

Underline Clear     Clears underlined         ESC Y
                    text mode                 CHR$(27);CHR$(89)

Character Repeat    Causes the next           ESC R, nnn
                    Character to be           CHR$(27);CHR$(82);
                    printed nnn times           "nnn"

Line Feed 1/6       Sets 1/6 inch             ESC A
Inch                spacing between           CHR$(27);CHR$(65)
                    lines

Line Feed 1/8       Sets 1/8 inch             ESC B
Inch                spacing between           CHR$(27);CHR$(66)
                    lines

Custom Line Feed    Sets nn/144 inch          ESC T, nn
                    spacing between           CHR$(27);CHR$(84)
                    lines                       "nn"

Forward Line Feed   Moves paper in normal     ESC f
                    (forward) direction       CHR$(27);CHR$(102)

Reverse Line Feed   Moves paper in reverse    ESC r
                    (backward) direction      CHR$(27);CHR$(114)

Bidirectional       Printer prints in         ESC <
Printing            both horizontal           CHR$(27);CHR$(60)
                    directions

Unidirectional      Printer prints in         ESC >
Printing            forward direction         CHR$(27);CHR$(62)
                    only

Left Margin Set     Sets left margin          ESC 8, nnn
                    to position nnn           CHR$(27);CHR$(56);
                                                "nnn"

Greek Characters    Selects Greek             ESC &
                    Character Set             CHR$(27);CHR$(38)

Graphic Symbols     Selects Graphic Symbol    ESC #
                    Character Set             CHR$(27);CHR$(35)

Alphanumeric        Selects (normal)          ESC $
Characters          alphanumeric character    CHR$(27);CHR$(36)
                    Set

Incremental Print   Selects Incremental       ESC [
Mode                Print Mode                CHR$(27);CHR$(91)

Logic Seek Mode     Selects (normal)          ESC ]
                    logic-seek mode           CHR$(27);CHR$(93)

Bit Image Graphics  Dot by dot firing mode    ESC S, nnnn
                    (nnnn = # of dot          CHR$(27);CHR$(83);
                    positions ex. 200=0200)     "nnnn"

Dot Column Repeat   Following 1 byte is       ESC V, nnnn
                    repeatedly printed in     CHR$(27);CHR$(86);
                    8 dots/dot column           "nnnn"

Dot Addressing      The head is moved to      ESC F, nnnn
                    the dot position          CHR$(27);CHR$(70);
                    indicated by nnnn           "nnnn"

         Dot by Dot spacing in proportional mode

1 Dot Space                                   ESC 1
                                              CHR$(27);CHR$(49)

2 Dot Space                                   ESC 2
                                              CHR$(27);CHR$(50)

3 Dot Space                                   ESC 3
                                              CHR$(27);CHR$(51)

4 Dot Space                                   ESC 4
                                              CHR$(27);CHR$(52)

5 Dot Space                                   ESC 5
                                              CHR$(27);CHR$(53)

6 Dot Space                                   ESC 6
                                              CHR$(27);CHR$(54)