Words that end in 8021
Maybe these words will be useful:
- ieee 802 — (networking, standard) The IEEE standards for local area networks. The spanning tree algorithm is defined in IEEE 802.1 (under consideration), Logical Link Control (LLC, the upper portion of the data link layer) in IEEE 802.2, Ethernet in IEEE 802.3, Token Bus in IEEE 802.4 and IBM Token Ring in IEEE 802.5. The equivalent ISO standard is IS 8802.
- rca 1802 — (processor) An extremely simple microprocessor fabricated in CMOS, running at 6.4 MHz at 10V (very fast for 1974). It could be suspended with the clock stopped. It was an 8-bit processor, with 16-bit addressing. Simplicity was the primary design goal, and in that sense it was one of the first RISC chips. It had sixteen 16-bit registers, which could be accessed as thirty-two 8-bit registers, and an accumulator D used for arithmetic and memory access - memory to D, then D to registers and vice versa, using one 16-bit register as an address. This led to one person describing the 1802 as having 32 bytes of RAM and 65535 I/O ports. A 4-bit control register P selected any one general register as the program counter, while control registers X and N selected registers for I/O Index and the operand for the current instruction. All instructions were 8 bits - a 4-bit op code (total of 16 operations) and 4-bit operand register stored in N. There was no real conditional branching, no subroutine support and no actual stack but these could be implemented by clever use of registers, e.g. changing P to another register allowed jump to a subroutine. Similarly, on an interrupt P and X were saved, then R1 and R2 were selected for P and X until an RTI restored them. The RCA 1805 was an enhanced version. The 1802 was used in the COSMAC (VIP?) microcomputer kit, some video games from RCA and Radio Shack, and the ETI-660 computer. It was chosen for the Voyager, Viking and Galileo space probes as it was also fabricated in Silicon on Sapphire, giving radiation and static resistance, ideal for space operation.
- 1802 — (processor) An 8-bit microprocessor manufactured as CDP1802 by HARRIS Semiconductor. It has been around for ten years at least and is ideally suited for embedded applications. Some of its features are: 8-bit parallel organisation with bidirectional data bus and multiplexed address bus; static design -- no minimum clock rate; bit-programmable output port; four input pins which are directly tested by branch instructions; flexible programmable I/O mode; single-phase clock, with on-chip oscillator; 16 x 16 register matrix to implement multiple program counters, pointers, or registers
- cdp1802 — RCA 1802
- smalltalk-80 — (language) The classic standard Smalltalk dialect, described in Adele's book, cited below, commonly known as "The Blue Book". Mail server: [email protected]
- trs-80 — (computer) A series of personal computers sold by Tandy Radio Shack. The '80' refers to the use of Zilog Z-80 processor (NOT Intel 80x8x). There were 7.5 computers in the TRS-80 line: Models I, II, III, 4, 100, 102, 200. The Model 4P was a portable version of the Model 4 with no tape drive -- only 2 1/2-height single sided disk drives. Later models that Radio Shack produced were not TRS-80 machines -- they were based on the Intel 80x8x architecture. These included Tandy 1000, Tandy 2000, Tandy 3000, and others. The 1000 had a proprietary Color card. The 2000 was a powerful machine for its time, but was based on the Intel 80186, so when IBM didn't build a computer based on this chip, it failed. It was used to design a boat for the America's Cup. The TRS-80 GUI, DeskMate, was proprietary, but no more than Windoze at the time. Many joke about "TRaSh-80" machines but several models were in fact classics of their time.
- z180 — (processor) An 8-bit microprocessor, code compatible with the Zilog Z80 and based on a design from Hitachi which is in turn based on the Zilog Z80.
- z80 — Zilog Z80
- pascal-80 — A successor of Platon. Developed at RC International for systems programming. Later it was renamed Real-Time Pascal. "PASCAL80 Report", J. Staunstrup, RC Intl, Denmark Jan 1980.
- zx-80 — (computer) Sinclair's cheap personal computer with built-in BASIC, launched at the end of January 1980 at a computer fair in Wembley, UK. The processor was an NEC 780-C running at 3.25 MHz. It had 1KB of RAM, externally expandable to 16KB, and 4KB of ROM. It had RF video output to a TV, displaying 24 lines by 32 characters of monochrome text. An audio cassette recorder was used to save programs. The ZX-80 was sold in kit form for £79.95 or ready-built for £99.95. It was used by many UK hobbyists as a means of learning the basics of computing. Some remember the 1KB ZX-80 for the claim in its advertising that you could control a nuclear power station with it. The ZX-80 was succeeded by the ZX-81.