SC‐55 PCM ROMs
The ROM layout is similar for the SC-55 and SC-55mkII PCM ROMs. Total size of ROM files are 3145728 bytes (3 MB).
| Address | Short name | Description |
|---|---|---|
| 0x000000 - 0x000019 | Header | Bank 0: Header in ASCII. Only part of ROM bank that is not encrypted |
| 0x000020 - 0x0000BF | Version | Bank 0: Version and date in ASCII. Rest is unused. |
| 0x0000C0 - 0x0FFFFF | Sample bank | Bank 0: Raw sample data |
| 0x100000 - 0x100019 | Header | Bank 1: Header in ASCII. Only part of ROM bank that is not encrypted |
| 0x100020 - 0x1000BF | Version | Bank 1: Version and date in ASCII. Rest is unused. |
| 0x1000C0 - 0x1FFFFF | Sample bank | Bank 1: Raw sample data |
| 0x200000 - 0x200019 | Header | Bank 2: Header in ASCII. Only part of ROM bank that is not encrypted |
| 0x200020 - 0x2000BF | Version | Bank 2: Version and date in ASCII. Rest is unused. |
| 0x2000C0 - 0x2FFFFF | Sample bank | Bank 2: Raw sample data |
- Sample addresses are stored in the SC-55 Control ROM.
- ROM encryption is based on scrambling of both addresses and data.
- Samples are stored with 32kHz sample rate and in mono format.
- Samples are encoded with differential pulse-code modulation (DPCM).
