GSX consists of:
* GENGRAF.COM
* ASSIGN.SYS
* GSX.SYS
* Device drivers (e.g. DDMODE0.PRL)
GENGRAF.COM - This takes a .COM file and configures it for use with GSX. The resulting .COM file can be run without GENGRAF.COM and launches == GSX before running your code.SYS ==
ASSIGNGSX.SYS - This is a text file which contains the mapping device independent part of devices to driver files that implement themGSX.
DDMODE0.PRL - An example of a driver== GENGRAF. COM ==
Make your GSXprogram like any other .SYS - The device independent part of COM file. Then use GENGRAF.COM to configure it for GSX.Now run the resulting COM file which will start GSX and then your code. e.g. A>GENGRAF GSXDEMO.COM A>GSXDEMO.COM
== Drivers and ASSIGN.SYS ==
Amstrad/Locomotive provided DDMODE0.PRL, DDMODE1.PRL and DDMODE2.PRL which implement drivers for each of the CPC's screen modes.
ASSIGN.SYS is a text file which must exist along side gsx.sys and which contains the mapping of device id to the driver that implements that GSX device. When you program GSX you open a device by it's its id.
Example content of ASSIGN.SYS
01 @:DDMODE0.PRL
== Example ==[[Media:Gsxdemo.zip]][https://forum.classic-computing.de/forum/index.php?thread/18391-cp-m-80-erweiterung-gsx-quellcode/ Driver source code] [[Category:CP/M]] [[Category:GSX]]