Does anybody know how IORQL, RDL, WRL reacts at the SAM? At the Spectrum it will set to 0 if active. Should it be 1 at the SAM if active, then this signals would be inverted with an Invertor. And as it looks, they are set to 1 instead 0 at the Spectrum.
Excuse for my bad technical english, but I hope, specialists will know what I mean. Any idea? Or a source for looking at the Internet?
|-----------------+----------------------------------------------------------| | IORQL (1C) | Input/output Request becomes active when the address bus| | | contains a current port address from the processor. | |-----------------+----------------------------------------------------------| | MREQL (2C) | Memory Request becomes active when the address bus| | | contains a current memory address front the processor. | |-----------------+----------------------------------------------------------|
|-----------------+----------------------------------------------------------| | RDL (2A} | Read signal from the processor. | |-----------------+----------------------------------------------------------| | WRL (3A} | Write signal from the processor. | |-----------------+----------------------------------------------------------|
Thank for help in advance. Wolfgang
