collapseos/blk/583

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(entry) ~ACIA ( Set RST 38 jump ) PC ORG @ 0x39 + !
AF PUSH, HL PUSH, DE PUSH,
( Read our character from ACIA into our BUFIDX )
ACIA_CTL INAi,
0x01 ANDi, ( is ACIA rcv buf full? )
IFNZ,
( correct interrupt cause )
ACIAW> LDHL(n),
( is it == to ACIAR>? )
( +0 == ACIAR> )
DE ACIAR> LDdd(n),
( carry cleared from ANDi above )
DE SBCHLd, ( cont. )