![]() Data General Data Terminal Systems DEC Delco Destron Fearing Elbit EMR ESI Fairchild Fastcomm Ferranti Fordįreescale Fujitsu GE General Instrument GM GTE Hitachi Honeywell HP Hughes Hybrid Systems Hyundai IBM Įxplore our collection of memorabilia from the world's leading Electronics & Semiconductor CompaniesĪDS AKAI AMD Amdahl Ampex AMS Analog Devices Apple Applied Materials Atari ATI AT&T Bell Labsīosch Burroughs CBS - HYTRON Cisco Canon Cincinnati Milacron Control Data Cray Cyrix Digital Angel Minimum system configuration consisted of the 8085 microprocessor, 8155, 2K RAM, I/O Timer, andĨ355 16K ROM & I/O or 8755 16K erasable ROM & I/O. The PCB Board itself Measures 30.5 (W) x 25.7 (D) x 1.3 (H) cm. This vintage SDK-85 computer was completely assembled back in the 1970's from the original Intel kit components and was nicely mounted in a solid wood case for use by it's builder. A 38 line parallel interface was also available. User could enter and read program results through either the buit-in keyboard/display or using a serial Teletype through the built-in serial TTY interface. ![]() The Intel 8085 microprocessor was designed for use in high-performance applications ranging from controllers to 8-bit minicomputers.Ī 2 KB monitor software stored on ROM chip provided the same commands as the SDK-86 board. The SDK-85 was a complete microcomputer system on a single PCB board including 256 to 512 bytes fo RAM memory and 2k of ROM memory, a 24 key hexadecimal keyboard, a 6 digit LED display, I/O connections and an expansion area allowing memory and I/O expansions as well as hardware experiments.The system used an Intel 8085A (5 for 'first 5 Volt microprocessor') CMOS MPU running at 3.072 M Hz. An external 5V/12V power supply unit was required to operate the SDK-85, it was not included with the SDK-85 kit. The 8085 kits usually came in component form with a printed circuit board (PCB) that required the owner to assemble and solder. In the early years of Microprocessor development, each time Intel introduced a new microprocessor (the Intel 8085 Microprocessor in this case) they would simultaneously offer a System Development Kit (SDK) allowing computer programmers & engineers a way to introduce themselves to the new processor's features and helped third part developers with hardware and software applications. It is hand-marked "A-1" on the box which is for the first version of this chip manufactured by Intel. This was a presentation award given to a select Intel employees who worked on the i386 Processor program. The 386SL was the first chip specifically made for portable computers. It added a special system management mode (SMM), in which the BIOS could more easily perform power management and other functions without requiring OS support. In October 1990, Intel released the 80386SL, which was basically an 855,000 transistor version of the 386SX processor, with cache, bus, and memory controllers, ISA compatibility and power management circuitry. The i386SL was first available at 20 MHz clock speed, with the 25 MHz model later. The extra functions and circuit implementation techniques caused this variant to have over 3 times as many transistors as the i386DX. It also contained support for an external cache of 16 to 64 kb. This processor offered several power management options, as well as different "sleep" modes to conserve battery power. Simple ALU register, register and register, immediate cached operations could now complete in a single cycle this previously required at least 2 cycles.The Intel i386SL was introduced as a power efficient version for early laptop computers (Intel 386 Laptop computers first emerged as a portable computing platform in 1990). The pipeline itself received some attention as well. Furthermore more aggressive math algorithms were used to implement the new FPU yielding faster floating point calculations. 80387, 80287, etc.), the 80486 moved the unit on-die eliminating the external communication delays altogether. Whereas before a separately packaged math coprocessor was used (i.e. Various enhancements were also made to the bus interface including faster communication that required single clock cycle instead of multiple. This provided much needed faster access to recently used data and instructions. The 8 KB, 4-way set associative, write-back policy, cache was unified for both the data and instructions. To improve performance Intel introduced a new layer of cache on-die (previously various external extensions existed). Like its predecessor, the 80486 maintains full backwards object code comparability with the all previous x86 processors ( 80386, 80286, 80186, etc.). Architecture Main article: 80486 Microarchitectures
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