DD_L_READ
Low level uPD765A read command
Table of Contents
| Function |
Address | Description |
| DD_L_READ |
0190 | Low level uPD765A read command |
Synopsys
Low level uPD765A read command.
- Read data.
- Read deleted data.
- Read a track.
- Writes commands.
- Reads data.
- Reads results.
- Motor must be running.
Entry Parameters
| Register |
Content |
| HL |
Address of parameter block |
Exit Parameters
- HL = Address of result buffer in page 7
- Always:
- AF BC DE IX corrupt, all other registers preserved.
Parameter Block Format
| Bytes |
Length |
Content |
| 0 | 0 | 1 |
Page for 0xC000…0xFFFF |
| 1 | 2 | 2 |
Address of buffer |
| 3 | 4 | 2 |
Number of bytes to transfer |
| 5 | 5 | 1 |
Number of command bytes n |
| 6 | 5+n | n |
Command bytes |