{| border="1"
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! Date Data rate
! description
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{| border="1"
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! Date rate Mode
! description
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:3. How to determine the actual rate. The NEC765 floppy disc controller is supplied with a single clock. When reading from and writing to a disc using the NEC765 you can choose FM or MFM recording modes. Use of these modes and the clock into the NEC765 define the final rate at which the data is written to the disc.
:When FM recording mode is used, data is read from or written to at a rate which is double that of when MFM is used. The time for each bit will be twice the time for MFM.:Also, the actual rate is twice longer than indicated in the datasheet as the NEC765 clock runs at 4MHz on CPC instead of 8MHz for the datasheet.
:Examples:
! Actual rate
|-
| 4Mhz 4MHz
| FM
| 4us 8µs per bit
|-
| 4Mhz 4MHz
| MFM
| 2us 4µs per bit
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