An alternative way to output (single) inverted characters

[Mike]

I found this out yesterday, that one can include quote-mode even in PRINT statements...

PRINT CHR$(128+20)CHR$(4) will print an inverse 'D'. The best thing however is, you can write this with control-characters alone, as follows:

PRINT{2 QUOTE}{DEL}{RVS ON}{SHIFT T}D{RVS OFF}{2 QUOTE}{DEL}

so that the screen reads (in lower case): print"Td", with 'T' and 'd' in inverse video. For single inverted chars this needs one byte less than the embedding in {RVS ON} and {RVS OFF}.

Michael

[GreyGhost]

That's pretty cool. I wonder why it only works with the first character?

Later,

[carlsson]

Shift+T (INS) will put the computer in insert mode, even if executing a PRINT statement. Try this:

PRINT"{SHIFT+DEL}{CRSR UP}"
PRINT"{SHIFT+DEL}{SHIFT+DEL}{CTRL-2}{CRSR DOWN}"

However, this trick only works for characters and shifted characters. If you want to print inverse numbers, most symbols or C= graphics, you have to use proper RVS ON.

[GreyGhost]

Playing around with this idea and looking at the memory map, I noticed there was a location to tell the computer how many inserts outstanding. Location 216 does this for the Vic. Try this:

10 POKE216,11:PRINT""{DEL}{RVS ON}HELLO{SPACE}THERE{RVS OFF}"

As noted above, this idea only works with certain characters. Also, If you try to edit the line, It will mess it up(The "t" & the space disappears of course). This doesn't save memory or run any quicker, just a different way to do it.

Another thing, Don't expect to use any control chars {blk}{wht} ect... They will only come out as characters in quote(or insert) mode. You could use location 646 to tell the computer what color its cursor is. BTW, You can use location 646 to PRINT in multicolor mode using values 8-15 and using location 36878 to change auxilury color.
Later,