collapseos/blk/401
Virgil Dupras b97e761942 Add Grid subsystem
The goal is to offload the SMS VDP driver a little bit.
2020-11-09 17:26:15 -05:00

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Grid subsystem
Given a device driver following the Grid protocol, implement
AT-XY and (emit). (emit) makes the grid behave like a regular
terminal, honoring line feeds and backspaces, wrapping at the
end of a line.
2 bytes of system memory at GRID_MEM are needed for cursor
position.
Load range: B402-B403