sdcc has the tlcs90 backend, supporting the Toshiba TLCS-90 architecture, which was once popular in some embedded devices, such as printers. The TLCS-90 is similar to other Z80-related architectures. However, we currently do not do regression testing for this architecture. It is not supported in ucsim. It would be good if ucsim also had TLCS-90 support, since this would make regression testing easy.
Philipp
DS400 also has not regression test.