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| Host Command Summary | |
| VT640 Emulation |
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| ALPHANUMARIC MODE |
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| Select G0 character set for alpha text | ESC SI | |
| Select G1 character set for alpha text | ESC SO | |
| CURSOR MOVEMENT |
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| Move cursor down 1 pixel | ESC \ b | |
| Move cursor down 16 pixels | ESC \ B | |
| Move cursor left 1 pixel | ESC \ d | |
| Move cursor left 16 pixels | ESC \ D | |
| Move cursor right 1 pixel | ESC \ c | |
| Move cursor right 16 pixels | ESC \ C | |
| Move cursor up 1 pixel | ESC \ a | |
| Move cursor up 16 pixels | ESC \ A | |
| Move cursor to beginning of line | ESC \ CR | |
| Move text cursor down | LF | |
| Move text cursor left | BS | |
| Move text cursor right | HT | |
| Move text cursor up | VT | |
| Move text cursor to start of line | CR | |
| GENERAL OPERATION |
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| Clear screen & enter Graphics Text mode | ESC FF | |
| Copy screen data to parallel port | ESC ETB | |
| Request status report | ESC ENQ | |
| Select bypass mode | ESC CAN | |
| Sound bell | BEL | |
| Specify data (*) for graphics memory loading | ESC + * # | |
| Specify screen address for g. memory load | ESC " *h ; *v a | |
| Specify writing mode (0 = pix. off, 1 = on, 2 = comp) | ESC / * d | |
| Transmit graphics memory (*h *v coords, *s bit sets) | ESC " *h ; *v *s c | |
| GRAPHICS TEXT MODE |
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| Select character size 0 (80x34) | ESC 0 | |
| Select character size 1 (40x17) | ESC 1 | |
| Select character size 2 (26x11) | ESC 2 | |
| Select character size 3 (20x8) | ESC 3 | |
| Select Graphics Text font 1 (74x35) | ESC 8 | |
| Select Graphics Text font 2 (81x38) | ESC 9 | |
| Select Graphics Text font 3 (121x58) | ESC : | |
| Select Graphics Text font 4 (133x64) | ESC ; | |
| Select text zoom factor 1 | ESC \ e | |
| Select text zoom factor 2 | ESC \ f | |
| Select text zoom factor 3 | ESC \ g | |
| Select text zoom factor 4 | ESC \ h | |