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collapseos
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Mirror of CollapseOS
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collapseos/arch/z80/sms/blk/621

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  1. : (ps2kcB) ( for port B )

  2. 	( Port B TL is bit 2 )

  3.     _D2@ 0x04 AND IF 0 EXIT ( nothing ) THEN

  4.     0 _THB! ( Port B TH output, low )

  5.     _D1@ ( bit 7:6 go in 1:0 ) 6 RSHIFT ( n )

  6.     _D2@ ( bit 1:0 go in 3:2 ) 0x03 AND 2 LSHIFT OR ( n )

  7.     1 _THB! ( Port B TH output, high )

  8.     _D1@ ( bit 7:6 go in 5:4 ) 0xc0 AND 2 RSHIFT OR ( n )

  9.     _D2@ ( bit 1:0 go in 7:6 ) 0x03 AND 6 LSHIFT OR ( n )

  10. 	2 _THB! ( TH input ) ;