Topic       : Pure Assembler Documentation
Author      : John Kormylo
Version     : PASM.HYP 1.0
Subject     : Documentation/Pure Assembler
Nodes       : 740
Index Size  : 20262
HCP-Version : 3
Compiled on : Atari
@charset    : atarist
@lang       : en
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@help       : Help
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View Ref-File[ bcostat_vec ]

bcostat_vec  = $55E  ;8L  vectors   BIOS    Bcostat  0-7

Returns 0 in D0 if device is ready for more characters, -1 otherwise.

Vector  Handle  Device
-----   ------  ------
$55E      0      PRN:
$562      1      AUX:
$566      2      CON:
$56A      3      IKBD  (Note: 3 & 4 reversed for bcostat_vec)
$56E      4      MIDI
$572      5      RAW

Handles 6-7 are not implemented on the ST.
The ARE implemented on the TT, but not using these jump vectors (see
Bconmap).