Intel 8288






Intel 8288





Pinout of 8288


The Intel 8288 is a bus controller designed for Intel 8086/8087/8088/8089. The chip is supplied in 20-pin DIP package. The 8086 (and 8088) operate in maximum mode, so they are configured primarily for multiprocessor operation or for working with coprocessors. Necessary control signals are generated by the 8288. It was used in the IBM PC, XT and its clones.[1]IBM PC AT used its successor Intel 82288.




Contents






  • 1 Pin assignment and function for the control lines


  • 2 Variants


  • 3 References


  • 4 External links





Pin assignment and function for the control lines





















































































































Name
Pin
Input (I),
Output (O)
Function

VCC
20

Input power (+5 V)
GND
10

Ground (0 V)

S0, S1, S2
19, 3, 18
I

Status input
CLK
2
I

Clock

AEN
6
I

Address Enable
CEN
15
I

Command Enable
IOB
1
I

Input/Output Bus Mode

MRDC
7
O

Memory Read Command

MWTC
9
O

Memory Write Command

AMWC
8
O

Advanced Memory Write Command

IORC
13
O

I/O Read Command

IOWC
11
O

I/O Write Command

AIOWC
12
O

Advanced I/O Write Command

INTA
14
O

Interrupt Acknowledge
DT/R
4
O

Data Transmit/Receive
DEN
16
O

Data Enable
MCE/PDEN
17
O
MCE (if IOB is LOW), PDEN (if IOB is HIGH)
ALE
5
O

Address Latch Enable


Variants


Both Intel 8288 and I8288 (industrial grade) version were available for US$14.30 and $33.75 in quantities of 100 respectively.[2][3]



References





  1. ^ "The structure of the original IBM PC's motherboard". tu-chemnitz.de. Retrieved November 27, 2013..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  2. ^ The 8086 Family: Concepts and realities, Intel Preview Special Issue: 16-Bit Solutions, Intel Corporation, May/June 1980, page 19


  3. ^ 8086 Available for industrial environment, Intel Preview Special Issue: 16-Bit Solutions, Intel Corporation, May/June 1980, page 29




External links


  • 8288 Bus-Controller data sheet



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