allow use of characters 0-31 #155
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implements `VDU 27,x` which will send character `x` to the screen, allowing characters 0-31 and 127 to be written to screen (as per R.T.Russell’s BASIC for Windows) add in `VDU 23,0,&90,x` as an alternative way to redefine characters - operates the same as `VDU 23,x` but additionally allows characters 0-31 to be redefined also adds `VDU 23,0,&91` to do a character-set reset. this will allow `*FX 20` to be implemented, which performed this function on RISC OS
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I have a subsequent change that is now present in the Console8 VDP 2.4.0 release that allows for characters to be mapped to bitmaps. I can add the commit that adds that functionality to this PR, or wait until this has been merged before raising a separate PR |
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implements
VDU 27,xwhich will send characterxto the screen, allowing characters 0-31 and 127 to be written to screen (as per R.T.Russell’s BASIC for Windows)add in
VDU 23,0,&90,xas an alternative way to redefine characters - operates the same asVDU 23,xbut additionally allows characters 0-31 to be redefinedalso adds
VDU 23,0,&91to do a character-set reset. this will allow*FX 20to be implemented, which performed this function on RISC OS