What is the data storage method used by the HE-800A, and how can custom patterns be added?
The HE-800A uses a P-ROM for data storage. Custom sewing patterns can be added using the optional sewing data programming software (PS-300B), which allows new patterns to be created on a personal computer; a P-ROM writer is required for this process. (Page 4)
From the official Brother HE-800A Embroidery Machine manual, page 4
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