[comp.sys.apple] Could someone help with Serial port interface?

LMB7421@RITVAX.BITNET (04/28/88)

I am attempting to write a serial port driver which will take advantage
of the GS serial buffering ability...however, I can't seem to get the
advanced interface to accept the call.
Currently, I am using the routine/calls described below...

LDA #${low byte of pointer}
LDX #${middle byte}
LDY #${bank byte}
JSR $C214 {the address of the advanced interface...}

The address pointed to contains this...

$04 {#of parameters + 1 for the error + 1 for the command}
$12 {Command for set InBuff}
$0000 {error word}
$00006000 {my input buffer address}
$03FF {the length of the buffer}

In reality, I'm also storing #$C2 in $7f8 and $CFFF, but that's not it...
No matter what I try, the computer hangs...Any hints?

Les Barstow  a.k.a. Phoenix
LMB7421@RITVAX.BITNET
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