was an Intel
-licensed version of the 386SX
(32-bit internal, 16-bit external, 24-bit memory addressing), developed and manufactured by IBM
in 1991. It included power-management capabilities and an 8KB internal cache
, which enabled it to yield comparable performance to 386DX
processors of the same clock speed, which were considerably more expensive. Known inside IBM as "Super Little Chip"
for its initials, it was used in IBM PS/2
35, 40 56 Series and in IBM PS/ValuePoint
, but never gained much market share. This was mainly due to an agreement with Intel, in which IBM was not allowed to sell their CPUs if they were not part of a system or upgrade board. It was also marketed as an optional upgrade
-equipped IBM PS/2 25 Series computers.
Design and Technology
Built with complementary metal oxide semiconductor
) technology, the IBM 386SLC had a 161-square millimeter die
. It was available with clock speeds of 16, 20, and 25 MHz
. The 25 MHz model produced only 2.5 watts
of dissipated power, making it specially well suited for laptops
and other portable devices.
Despite the fact that the SLC and DLC chips are bus compatible with i386SX and i386DX respectively, they can not be used as drop-in replacements as they are not pin-compatible.
Is an improved version of the IBM 386SLC, based on the Intel core. IBM 486SLC featured 16Kb of L1 cache and the i486 instruction set. It had 1.349 mln. transistors and a 69mm² die. It was... Read More