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collapseos
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Mirror of CollapseOS
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collapseos/arch/z80/rc2014/blk/605

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  1. : ACIA$

  2.     H@ [ ACIA( LITN ] ! 0 [ ACIAR> LITN ] C!

  3.     1 [ ACIAW> LITN ] C! ( write index starts one pos later )

  4.     [ ACIA_BUFSZ LITN ] ALLOT

  5. ( setup ACIA

  6.   CR7 (1) - Receive Interrupt enabled

  7.   CR6:5 (00) - RTS low, transmit interrupt disabled.

  8.   CR4:2 (101) - 8 bits + 1 stop bit

  9.   CR1:0 (10) - Counter divide: 64 )

  10.     0b10010110 [ ACIA_CTL LITN ] PC!

  11.     (im1) ;