Hi, i'm writing the pset() and paint() functions alike at the BASIC using the documentation
about the sub-ROM as follow below:
PAINT (Basic!)
Address : #0069
Function : Paints graphical screen
Input : HL - Basic textpointer
Output : HL - Adapted Basic textpointer
Registers: All
PSET (Basic!)
Address : #006D
Function : Sets a point
Input : HL - Basic textpointer
Output : HL - Adapted Basic textpointer
Registers: All
This two ROM-BIOS call and other BIOS call are explaned in this link http://map.grauw.nl/resources/subrom.php , but i don't know what's the HL register and where it point.
I want know if the address in the HL register point to the x and y coordinates? And if yes i want know if can i put in HL a normal RAM cell address or only CPU registers.
Nobody can answer my questions ?

