So the basic plot and tile map arrangements are made. Next up is the “open and parse” BMP file from where the currently emulated virtual SD Card will be. This will then allow me to get on with some simple graphics, a compressed large map format and joystick motion of a sprite around the map.
I’m now used to the syntax enough to go for a generic file open routine, and deal with any PETSCII encoding problems. I’ll have to check to see if I can get a list of the directory today. And yes it seems like device 1 is the device to use. The fact that cbm_file library is currently buggy is maybe based on the advice in the programmer’s handbook to use 255 as the auxilliary command, but who knows? It does seem like OPEN <X>, 1, <W(1)/R(0)> is the one, but then the close call crashes as the open failed. The read likely returns a fail code but “works” without a device error.
Millfork and the emulator are now upgraded, and I must try to see what the fixes are, as some breaking changes have been made. Still waiting on the role out of the VSCode plugin update and might have to manual install it from source. Still good for helping with the build and test though. It’s fun although a little frustration when off spec features are yet to be done.