2020-05-21 10:31:56 +10:00
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: _shift? ( kc -- f ) DUP 0x12 = SWAP 0x59 = OR ;
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: _get ( -- kc ) 0 ( dummy ) BEGIN DROP (ps2kc) DUP UNTIL ;
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: (key) _get
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DUP 0xe0 ( extended ) = IF ( ignore ) DROP (key) EXIT THEN
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DUP 0xf0 ( break ) = IF DROP ( )
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( get next kc and see if it's a shift )
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_get _shift? IF ( drop shift ) 0 PS2_SHIFT C! THEN
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( whether we had a shift or not, we return the next )
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(key) EXIT THEN
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DUP 0x7f > IF DROP (key) EXIT THEN
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DUP _shift? IF DROP 1 PS2_SHIFT C! (key) EXIT THEN
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( ah, finally, we have a gentle run-of-the-mill KC )
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2020-05-21 22:53:36 +10:00
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PS2_CODES PS2_SHIFT C@ IF 0x80 + THEN + C@
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2020-05-23 03:48:30 +10:00
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?DUP NOT IF (key) THEN ;
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