Protocols

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Communication with devices

Here is a commented log when formatting a SSSD floppy disk with the TI disk controller. Actually, this dump was achieved using MESS and putting in some printf lines.


XModem protocol

The XModem protocol transmits data in a sequence of blocks.

Block Block Block ... Block

where each block is defined in this way (numbers tell the number of bytes for each field):

1 1 1 128 1
SOH Number /Number Data bytes Checksum