Although EazyLink EazyLink2 offers more features , Y-Modem file transfers can and is more tolerant of varying serial port hardware configurations, YMODEM file transfers reach triple its maximum speed , - achieving 3K/sec at 38400bps regardless of OZ version, since the Y-Modem . 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. Also, by increasing the block size from 128 bytes to 1K and by batching multiple files together into a single session, YMODEM significantly increases communication efficiency.
Transferring the 256KB of OZ 4.7.1 ROM files will take around 1m25s 1 min 25 secs - something that is an agonising order of magnitude slower on an unmodified Z88, constrained as it is to 9600bps in EazylinkEazyLink2, or slower still if using ImpExport.
Z88 Setup
There are several ways to perform a Y-Modem 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.
OZ Version | Popdown | Method |
---|---|---|
5.0 | Filer | Tab |
5.0 | Shell |
|
4.5 - 4.7.1 | ImpExport |
|
2.2 - 4.4.1 |
|
Info |
---|
Remember to set the serial transmit and receive baud rates to 38400, and to disable Xon/Xoff, in Panel popdown ( |
Computer Setup
On computer side, the recommended software is WindTerm since it is free and is available for Windows, macOS, and Linux. Configure as follows:
Consult the following guides: