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The Intel 8085 ("eighty-eighty-five") is an 8-bit microprocessor produced by Intel and introduced in March 1976. [2] It is the last 8-bit microprocessor developed by Intel. It is software-binary compatible with the more-famous Intel 8080 with only two minor instructions added to support its added interrupt and serial input/output features.
(The basic 8080 instruction cycle time was 1.95 μs, which was four clock cycles.) The SDK-80 allowed interface to an existing application or custom interface development. A monitor ROM was provided. RAM 256 bytes expandable to 1 KB; ROM 2 KB expandable to 4 KB; Size/weight 12 (W) × 0.5 (D) × 6.75 (H) inch
Memory-mapped I/O is preferred in IA-32 and x86-64 based architectures because the instructions that perform port-based I/O are limited to one register: EAX, AX, and AL are the only registers that data can be moved into or out of, and either a byte-sized immediate value in the instruction or a value in register DX determines which port is the source or destination port of the transfer.
Eight-bit computers running CP/M 80 were built around an Intel 8080/8085, Zilog Z80, or compatible CPU. CP/M 86 ran on the Intel 8086 and 8088. Some computers were suitable for CP/M as delivered. Others needed hardware modifications such as a memory expansion or modification, new boot ROMs, or the addition of a floppy disk drive.
The Object Module Format (OMF) is an object file format used primarily for software intended to run on Intel 80x86 microprocessors. It was originally developed by Intel around 1975–1977 for ISIS-II, targeting the 8-bit 8080/8085 processors.
The Intel 8279 is a keyboard and display controller developed for interfacing to Intel 8085, 8086 and 8088 microprocessors. The industrial version of ID8279 was available for USD $30.70 in quantities of 100. [1] Its important features are: [2] Simultaneous keyboard and display operations. Scanned keyboard mode.
Interface name Year introduced Connector Max transfer Main use Notes CAMAC: 1972: Processor independent: Industry use. S-100: 1974: 2×50 2.54 mm card edge: Designed around Intel 8080 but used with other processors too: Homebrew and industry use. VME: 1981: DIN 41612: 10 MByte/s: Motorola 68000 based: Industry use. STEbus: 1983: DIN 41612 a+c ...
An earlier chipset support for Intel 8085 microprocessor can be found at MCS-85 family section. Early IBM XT-compatible mainboards did not yet have a chipset, but relied instead on a collection of discrete TTL chips by Intel: [1] the 8284 clock generator; the 8288 bus controller; the 8254 programmable interval timer; the 8255 parallel I/O interface