- Intel 80188
Infobox Computer Hardware Cpu
name = Intel 80188
caption =
produced-start = 1980
produced-end = 1982
slowest = 8 | slow-unit = MHz
fastest = 10 | fast-unit = MHz
manuf1 = Intel
arch =x86 -16
pack1 = 68-pinThe Intel 80188 is a version of the
Intel 80186 microprocessor with an 8 bit externaldata bus , instead of 16 bit. This makes it less expensive to connect to peripherals. Since the 80188 is very similar to the 80186, it had a throughput of 1 millioninstructions per second . [http://pantera.itch.edu.mx:8080/apacheco/expo/view.jsp?file=asm2#page12]As the 8086, the 80188 featured four 16-bit general registers, which could also be accessed as eight 8-bit registers. It also included six more 16-bit registers, which included, for example, the stack pointer, the
instruction pointer ,index registers , or a status word register that acted like a flag, for example, in comparison operations.Just like the 8086, the processor also included four 16-bit segment registers that enabled the addressing of more than 64
KB of memory, which is the limit of a 16-bit architecture, by introducing an offset value that was added, after being shifted left 4 bits, to the value of another register. This addressing system provided a total of 1 MB of addressable memory, a value that, at the time, was considered to be very far away from the total memory a computer would ever need.External links
* [http://www.cpu-collection.de/?tn=1&l0=cl&l1=80186/188 Intel 80186/80188 images and descriptions at cpu-collection.de]
* [http://www.datasheetarchive.com/search.php?q=80188 Scan of the Intel 80188 data book at datasheetarchive.com]
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