The Seiko RC-1000 has 2K of internal RAM to store all of your data (2027 bytes).
The start byte is always 0x00 and the end byte 0x4C (“L”) are required to indicate the start and end of transmission (the Seiko has no flow control).
The first 25 bytes (after the start bytes) are reserved for the Directory. Essentially this is a table of content which describes the pages of data that will be sent (see below).
The first byte begins with 0x4C (ASCII “L”) . The remainder is filled with 12 pairs of 2 byte file addresses. This means it is possible to send a maximum of 12 pages. If less then 12 pages are sent, the remaining bytes are filled with spaces. We discuss the format of the Directory in the Directory Data section.