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| Field name | Type | Description | Versions |
|---|---|---|---|
| h1.dbnr | Unsigned integer, 1 byte | Memory block number | 1.0.0 to 1.6.5 |
| h1.dlen | Signed integer, 2 bytes | Length in words | 1.0.0 to 1.6.5 |
| h1.dwnr | Unsigned integer, 2 bytes | Address within memory block | 1.0.0 to 1.6.5 |
| h1.empty | Unsigned integer, 1 byte | Empty field | 1.0.0 to 1.6.5 |
| h1.empty_len | Unsigned integer, 1 byte | Empty field length | 1.0.0 to 1.6.5 |
| h1.header | Unsigned integer, 2 bytes | H1-Header | 1.0.0 to 1.6.5 |
| h1.len | Unsigned integer, 2 bytes | Length indicator | 1.0.0 to 1.6.5 |
| h1.opcode | Unsigned integer, 1 byte | Opcode | 1.0.0 to 1.6.5 |
| h1.opfield | Unsigned integer, 1 byte | Operation identifier | 1.0.0 to 1.6.5 |
| h1.oplen | Unsigned integer, 1 byte | Operation length | 1.0.0 to 1.6.5 |
| h1.org | Unsigned integer, 1 byte | Memory type | 1.0.0 to 1.6.5 |
| h1.reqlen | Unsigned integer, 1 byte | Request length | 1.0.0 to 1.6.5 |
| h1.request | Unsigned integer, 1 byte | Request identifier | 1.0.0 to 1.6.5 |
| h1.reslen | Unsigned integer, 1 byte | Response length | 1.0.0 to 1.6.5 |
| h1.response | Unsigned integer, 1 byte | Response identifier | 1.0.0 to 1.6.5 |
| h1.resvalue | Unsigned integer, 1 byte | Response value | 1.0.0 to 1.6.5 |