Fujitsu MBL8086 -1

A nice looking 8086 CPU! The early chips were sometimes white with gold plated pins. In the late 80'ies more and more chips were housed in black plastic packaging without the gold plated pins.

This particular CPU has been manufactured in the 34th week of 1986. It is an Intel-design but built bij Fujitsu. Fujistu was one of the (many) second suppliers of Intel 8086 CPU's. These 'copies' of chips exist due to a requirement of IBM to have more than one supplier available for their systems.

The 8086-1 is rated to run at 10MHz. However, in many cases it was run at 8MHz since 8MHz is the maximum official frequency for the ISA-bus. Systems that run at 10MHz essentially overclock the ISA-bus and thus ISA-cards.

Chips marked 8086-2 are rated 8MHz and without marking are often the original ones at 4.77MHz.