| Epson | Commands |
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| Notes |
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| Function | (ASCII, Decimal, Hexadecimal) |
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| Set Most Significant Bit | ASCII: ESC > | Set the MSB (8th bit) to 1. |
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| (MSB) to 1 | Dec: 27 62 |
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| Hex: 1B 3E |
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| Set Most Significant Bit | ASCII: ESC = | Sets the MSB (8th bit) to 0. |
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| (MSB) to 0 | Dec: 27 61 |
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| Hex: 1B 3D |
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| Reset Most Significant Bit | ASCII: ESK # | Cancels ESC > or ESC =. MSB accepted |
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| (MSB) | Dec: 27 35 | "as is" from computer. |
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| Hex: 1B 23 |
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| Print Suppress Mode On | ASCII: DC3 | Places printer in Print Suppress Mode |
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| Dec: 19 | after printing data in print buffer. |
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| Hex: 13 | Ignores all further commands except |
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| DC1 command. |
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| Print Suppress Effective item in MENU |
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| must be set to "Yes" for this command to |
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| be acknowledged. |
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| Print Suppress Mode Off | ASCII: DC1 | Clears Print Suppress Mode, re- |
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| Dec: 17 | activating printer to once again process |
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| Hex: 11 | all data received. |
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| Disable | ASCII: ESC 8 | OKI unique command. Disables paper- |
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| Sensor | Dec: 27 56 | out sensor, even if Paper Out Override |
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| Hex: 1B 38 | in MENU is set to "On" the (factory de- |
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| fault). If data flows onto next page and |
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| reaches top of form setting for that page, |
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| printer ALARM light will come on to in- |
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| dicate |
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| Enable | ASCII: ESC 9 | OKI unique command. Enables paper- |
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| Sensor | Dec: 27 57 | out sensor to detect when less than 1/ |
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| Hex: 1B 39 | 2 |
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| inch of paper is left. When ALARM light |
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| is on, pressing SELECT prints 1 line of |
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| data at a time until the top of form set- |
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| ting for the next page is reached. |
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| Sensor can also be controlled by the |
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| menu. |
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| ASCII: ESC s n | Prints at 50% of normal speed to reduce |
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| Printing On/ Off | Dec: 27 115 n | noise. |
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| Hex: 1B 73 n | n=1: |
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| n=0: |
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ML790/791 Printer Handbook | 97 |