READIO/WRITEIO access hardware registers directly, and therefore, if the interface hardware is different than the hardware on an HP BASIC Workstation, the READIO/WRITEIO registers will not be compatible. TransEra supplies a PC IEEE-488 bus controller card that duplicates the Series 200/300 HP-IB READIO and WRITEIO registers. Other IEEE-488 bus controller cards are not usually completely compatible. For other interfaces consult the interface register documentation.
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