How do I create and add custom sewing patterns to the HE-800A?
Custom sewing patterns can be created using the optional sewing data programming software (PS-300B), which allows you to design new patterns on a personal computer. A P-ROM writer is required to add these patterns to the machine, and data is stored via P-ROM. (Page 4)
From the official Brother HE-800A Embroidery Machine manual, page 4
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