Measurement Computing CIO-PDMAxx - Manual (Page 5)

1.0 INTRODUCTION
The CIO-PDMA16 and CIO-PDMA32 are high speed, 16-bit digital interfaces for
ISA bus personal computers. The CIO-PDMA16 utilizes 8-bit DMA transfers over
the ISA bus and will transfer internally or externally-clocked synchronous data at rates
of 250,000 bytes per second or 125,000 words per second. The CIO-PDMA16 is
100% compatible with MetraByte's PDMA-16. The software interface and connector
pin-out are identical. Software and cabling designed for the MetraByte board may be
used with the CIO-PDMA16.
The CIO-PDMA32 performs 16-bit transfers over the ISA bus, and offers a maximum
data transfer rate of 200,000 words per second in DMA mode, or 750,000 words per
second in REP INSW or REP OUTSW modes. In DMA mode, the CIO-PDMA32 is
fully compatible with the MetraByte PDMA-32. However, if faster transfers are
required, the user has the option of operating the board in the faster REP
INSW/OUTS modes.
Both boards provide a counter timer on the board that can be used as a digital pacer
circuit. In addition, the data transfers can be synchronized to an external clock or
timer.
Both boards include the convenient InstaCal installation and test software and are
fully compatible with the powerful Universal Library (UL) software driver package.
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