lwriter.cpp: Get video output working

[jrmuizel]

No description provided.

[Tafoid]

All machines in lwriter.cpp:
Snapshot size changed dramatically in my tests.
Previous resolution was 1285 x 240 and now they are 9457 x 3434 in size.

[jrmuizel]

That's expected

[jrmuizel]

Is it possible to provide serial input as part of these tests? It would be nice to confirm that printing the test page works

[jrmuizel]

Or actually even just testing with the dipswitches set to particular values?

[rb6502]

@jrmuizel The way this would normally be done is to move the LaserWriter main emulation and ROM loading etc. into a device in src/devices/machine/ and then have the existing driver instantiate that device and the terminal. Then you'd also add something to src/devices/bus/rs232/ that instantiated the LaserWriter device and connects it to incoming serial, which would allow it to talk to e.g. the Macintosh and Apple IIgs emulations.

Alternatively you could just move it wholesale to src/devices/bus/rs232 and use one of the emulated terminals (e.g. the VT-102) as a host for debugging. src/devices/bus/centronics/epson_lx810l.cpp provides an example of a working parallel dot matrix printer.