Although EazyLink EazyLink2 offers more features, YMODEM file transfers reach triple its maximum speed, achieving 3K/sec at 38400bps regardless of OZ version. This is because the YMODEM implementation does not use the OZ serial driver, so it is not limited to lower baud rates by the driver issues in the original Cambridge ROM versions. By increasing the block size from 128 bytes to 1K and by batching multiple files together into a single session, YMODEM increases efficiency.
Transferring the 256KB of OZ 4.7.1 ROM files will take around 1 min 25 secs - something that is an agonising order of magnitude slower on an unmodified Z88 constrained to 9600bps in EazylinkEazylink2.
Z88 Setup
There are several ways to perform a YMODEM transfer on the Z88, which will depend on OZ version. Remember to set the serial transmit and receive baud rates to 38400 in Panel.
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