
A794 Owner’s GuideChapter 6: Programming Information
Comparisons
The following table details the list of commands whose behavior differs from the A793(A756) and the A794(A758) because of the physical differences of a 6 dots/mm head (A793/A756) versus an 8 dots/mm head (A794/A758).
| Command | Description | Difference between previous product and new product |
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| emulation mode. |
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15 n | Feed n Dot Rows | This command will move the paper on the receipt | |
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| in n/203 inch steps instead of n/152 inch steps. |
16 n | Add n Extra Dot Rows | The dot rows will be measured in n/203 inches | |
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| versus n/152 inches. |
1B | 20 n | Set | This command sets the right side spacing to “n” |
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| Spacing | horizontal motion units. By default, these units |
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| are in terms of 1/203 inches versus 1/152 inches. |
1B | 24 n1 n2 | Set Absolute Starting | For graphics commands, the position is scaled to |
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| Position | best match the previous product. In text mode, the |
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| equivalent character position is calculated. |
1B | 26 s c1 c2 n1 d1...nn dn] | Define | Since the dots on the new printhead are smaller, |
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| Character Set | user defined characters that were used on the |
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| previous printers will appear smaller on the new |
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| printer. |
1B | 2A m n1 n2 d1...dn | Select Bit Image Mode | In emulation mode, graphics are scaled to best |
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| match the size of the graphic in the previous |
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| printer. |
1B | 33 n | Set Line Spacing | This command uses n in terms of n/360 inches. |
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| Since the previous product had a fundamental |
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| step of 1/180 inch and the new product has a |
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| fundamental step of 1/203 inch, the actual line |
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| spacing will not exactly match the requested |
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| spacing. |
1B | 4A n | Print and Feed Paper | (Same as above) |
1B | 59 n1 n2 d1...dn | Select | In emulation mode, the printer scales the graphics |
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| Graphics | to provide the best match. |
1B | 5C n1 n2 | Set Relative Print Position | The parameter to this command is in units of dots. |
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| However, the command moves and aligns to |
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| character positions. In emulation mode, this |
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| command calculates how many character |
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| positions to move based on the previous product’s |
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| character width in dots (10) versus the current |
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| product (13). |
1B | 61 n | Select Justification | This command does true dot resolution alignment |
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| for centering versus |
1D 2A n1 n2 d1...dn] | Define Downloaded Bit | IN emulation mode, this command scales the | |
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| Image | incoming data to provide a best match to the size |
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| of the image as it printed on the previous product. |
1D 2F m | Print Downloaded Bit | (Same as above) | |
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| Image |
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March 1999 | 45 |