4 ms·
The NEC765 used in the IBM PC is also "high-level", and so are all the later compatibles. There is no command to read or write raw data, you specify the (starti
by rep_lodsb 3y ago
The NEC765 used in the IBM PC is also "high-level", and so are all the later compatibles. There is no command to read or write raw data, you specify the (starting) sector number, and the controller will start reading the disk, but only transfer the data field over DMA once it finds a matching header field.