A83: Various things (for the E2 83 driver)
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A83: Various things (for the E2 83 driver)
Do the 2 above calls affect the graph buffer? (I sure hope so, or I have
a lot of work to do) Also, how can I protect against a program detecting
extra keypresses because the user didn't relaese the key s/he was holding
before the program got to the next get key?
Finaly, what's wrong with this code? It's supposed to inverse 7 rows of
pixels including whatever text is there. It is supposed to work at the
line number in the variable Barpos.
-------------- Code --------------
drawbar:
ld hl,(barpos) ; Copy barpos into l, crap into h
ld h,$00 ; ... But overwrite crap
ld de,$0000
ex hl,de
ld b,12
HlX12:
add hl,de ; Multiply by 12 to get offset
djnz HlX12
ld de,VIDEO_MEM ;
add hl,de ;
ld b,$54 ; b will be a counter -- 7 lines
drawloop:
ld a,(hl) ; Invert
xor 255 ;
ld (hl),a ;
inc hl
djnz drawloop
ret
Thanks,
Alan
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