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> 87312 / PC87312VF / PC87312 / national
87312 / PC87312VF / PC87312 / national
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PC87312VF National $7.50 each Please note: These parts are refurbs. The following spec sheet is provided by National and may cover several different versions and/or products. This listing is only for the item pictured and listed in the heading.
TM II/III) Floppy Disk Controller with Dual UARTs, Parallel Port, and IDE Interface
É PCÉ, PC-XTÉ, and PC-ATÉ peripherals. The PC87312 includes standard AT address decoding for on-chip functions and a Configuration Register set, offering a single chip solution to the most commonly used ISA, EISA and Micro Channel peripherals.
The on-chip FDC is software compatible to the PC8477, which contains a superset of the DP8473 and NEC
mPD765 and the N82077 floppy disk controller functions. The onchip analog data separator requires no external components and supports the 4 Mb drive format as well as the other standard floppy drives used with 5.25× and 3.5× media.
The IDE control logic provides a complete IDE interface except for the signal buffers. The Configuration Registers consist of three byte-wide registers. An Index and a Data Register which can be relocated within the ISA I/O address space access the Configuration Registers.
Features**100% compatible with IBM PC, XT, and AT architectures (PC87311A), or ISA, EISA, and Micro Channel architectures (PC87312) Y FDC:
* Software compatible with the DP8473, the 765A and the N82077
* 16-byte FIFO (default disabled)
* Perpendicular Recording drive support
* High performance internal analog data separator (no external filter components required)
* Low power CMOS with power down mode
* Software compatible with the INS8250N-B and the NS16450 (PC87311A), or PC16550A and PC16450 (PC87312)
* Compatible with all IBM PC, XT and AT architectures (PC87311A), or all ISA, EISA, and Micro Channel architectures (PC87312)
* Back Voltage protection circuit against damage caused when printer is powered up
* Provides a complete IDE interface except for optional buffers
* Provides selection of all primary and secondary ISA addresses including COM 1±4.
* The PC87311A and PC87312 are pin compatible
