C-Itoh, Model 8510 Printer, Centronics interface (parallel)

Switches and vars inside the case: SW1 +---------------+ | | | | | | | | | | | | | | | | | | -open +---------------+ VR2 VR1 8 1 /-\ /-\ frontpanel | | | | | \-/ \-/ SW2 | IMPRES. ALIGN. +---------------+ V | | | | | | | | | | | | | | | | | | -open +---------------+ 8 1

SW1: Pin 1 \ National character set. 000=Japan, 010=USA, 2 } 110=UK, 001=Germany, 101=Swedish 3 / 4 0=66 lines/page, 1=72 lines/page 5 0=DC1, DC3 effective; 1=ignored 6 1=line feed for too-long line 7 1=CR emulated when LF, VT, FF recieved 8 0=CR does only cr; 1=CR forces LF too

SW2: Pin 1 1=zero has a line through it 2 0=multiple-line buffer 3 unused 4 unused 5 0=10 cpi, 1=proportional -- font at power-up 6 0=8-bit data, 1=7-bit data 7 1=selected at power-on 8 0=bidirectional printing

VR1/ALIGN. : adjust to make bidirectional printing line up horizontally. Print a pattern with the | character, and adjust so they fall exactly in line.

VR2/IMPRES.: adjust if printing is too faint. The book does not describe how this is done, as a worn ribbon will also give faint printing.

Selection of Optional Functions * As shipped

Switch Status Result/Function 2-1 X Slashed Zero O * Un-Slashed Zero

2-2 X Device Address Effective O * Inneffective

2-3 O * Device Address 1 2-4 O /

2-3 X Device Address 2 2-4 O /

2-3 O Device Address 3 2-4 X /

2-3 X Device Address 4 2-4 X /

2-5 O * 10 CPI character 2-5 X Proportional character

2-6 X 7 bit data 2-6 O * 8 bit data

2-7 X Power-On Selected 2-7 O * Power-On Deselected

2-8 X Unidirectional Print 2-8 O * Bidirectional Print

Note: Up to four printers may be connected through the same cable to the host. The device address allows selection of each printer. Switches 2-2/3/4 relate to this capability. The printers are selected by escape sequence sent by the host as follows:

ESC a Select printer 1 ESC b Select printer 2 ESC c Select printer 3 ESC d Select printer 4 ESC ' Deselect all printers