- Email: [email protected]
Pet Eprom
PET EPROM Davidson-Richards have developed an EPROM programming system for use with the PET microcomputer. The system comprises a programming unit which fits directly to the user and cassette ports of the PET and a disc containing the software. It is provided with socket accommodation for 2k or 4k EPROM. Data can be read into the system work area from a disc file, the PET's own RAM or ROM or from the EPROM in the socket. A 16k or 32k PET with version 3.0 or 4.0 BASIC ROMs is required for the system. (Tel: (0332)
366803, UK)
Solid State R A M Solid State Scientific has announced the SCM5114, a 1024 x 4 static CMOS RAM, as a low power replacement for their 2114. The device is fully static and requires no clocks. Common data lines allow for simple interfacing with most microprocessors and a chip-select input is provided for memory expansion. It has a 200 ns maximum access time. The family is available in industry standard 18-pin packages, requires one 5 V supply and operates over a temperature range 0 - 7 0 ° C . (Tel: (215) 855 8400, USA)
facilitates the assembly of powerful yet compact memory systems using conventional automated testing and insertion equipment. Other features include an operating frequency range of 1 - 5 MHz, low capacitance TTLcompatible inputs (except clocks), three-state TTL-compatible latched data outputs and an output drive capability of 3.5 mA. (Fairchild
Camera & Instrument (UK) L td, 230 High Street, Potters Bar, Harts. EN6 5BU, UK. Tel (0707) 51111)
Low power R A M A low power dynamic random access memory board featuring 128 kbyte of RAM is now available from Piiceon. Designated Superstore, the board has been optimized for Alpha Micro System computers and can be configured for either 8- or 16-bit processors. The boards conform to the updated IEEE 696 standard for the S-100 bus, and can operate with virtually any updated S-100 system,
in addition to the AM-100 and AM-100T computers. The boards are organized as eight blocks of 16 kbyte, divided into two 64k memory blocks controlled by individual I/O ports. When used with 8-bit processors, memory is organized as 128k x 8; with 16-bit processors, 64k x 16. The Superstore memory can be addressed in two ways. It can accept an extended 24-bit address, which provides a 16 Mbyte address field, or it can be operated in bank-select mode (bank selection is made on 16 kbyte boundries). Each block can be individually enabled or disabled via simple switch settings or software commands to I/O ports. Memory refresh is transparent to the CPU, reducing processor overheads; memory is 3 MHz in either 8- or 16-bit systems; and access time is 330 ns with a cycle time of 550 ns. It is priced at $2000 in single quantities, though substantial discounts are available on high volume (100+) orders. (Piiceon Inc., 2-350 Bering
Drive, San Jose, CA 95112, USA. Tel: (408) 946 8030)
64k serial memory The F264 device is a buried channel memory fabricated in large volumes using Fairchild's double-poly N-channel isoplanar process. It is a 65 536-bit dynamic serial memory configured as 16 shift registers, each 4096 bits long, which can be accessed randomly. Each of the shift registers uses chargecoupled device (CCD) techniques with an interlaced serial-parallel-serial register structure which offers low power demand linked with high density characters. This dense structure allows memory to be mounted in a standard 16-pin dual-in-line package, a feature that
vol 5 no 4may 1981
The PKW-5000 is an EPROM programmer from Sinclair Electronics. It has an 8-bit ZSO CPU and 16k dynamic RAM and will program almost all EPROMs from 4 to 32 kbyte, using the RAM buffer method. The PKW-5000 features a slide switch for the simple selection of ROM type. An optional board is available which can be quickly and easily installed by the user, enabling it to interface with virtually any terminal or I/0. (Sinclair Electronics Ltd, London Road, St Ires, Huntingdon, Cambs. PEI 7 41-1/, UK. Tel: (0480)
64646)
167
366803, UK)
Solid State R A M Solid State Scientific has announced the SCM5114, a 1024 x 4 static CMOS RAM, as a low power replacement for their 2114. The device is fully static and requires no clocks. Common data lines allow for simple interfacing with most microprocessors and a chip-select input is provided for memory expansion. It has a 200 ns maximum access time. The family is available in industry standard 18-pin packages, requires one 5 V supply and operates over a temperature range 0 - 7 0 ° C . (Tel: (215) 855 8400, USA)
facilitates the assembly of powerful yet compact memory systems using conventional automated testing and insertion equipment. Other features include an operating frequency range of 1 - 5 MHz, low capacitance TTLcompatible inputs (except clocks), three-state TTL-compatible latched data outputs and an output drive capability of 3.5 mA. (Fairchild
Camera & Instrument (UK) L td, 230 High Street, Potters Bar, Harts. EN6 5BU, UK. Tel (0707) 51111)
Low power R A M A low power dynamic random access memory board featuring 128 kbyte of RAM is now available from Piiceon. Designated Superstore, the board has been optimized for Alpha Micro System computers and can be configured for either 8- or 16-bit processors. The boards conform to the updated IEEE 696 standard for the S-100 bus, and can operate with virtually any updated S-100 system,
in addition to the AM-100 and AM-100T computers. The boards are organized as eight blocks of 16 kbyte, divided into two 64k memory blocks controlled by individual I/O ports. When used with 8-bit processors, memory is organized as 128k x 8; with 16-bit processors, 64k x 16. The Superstore memory can be addressed in two ways. It can accept an extended 24-bit address, which provides a 16 Mbyte address field, or it can be operated in bank-select mode (bank selection is made on 16 kbyte boundries). Each block can be individually enabled or disabled via simple switch settings or software commands to I/O ports. Memory refresh is transparent to the CPU, reducing processor overheads; memory is 3 MHz in either 8- or 16-bit systems; and access time is 330 ns with a cycle time of 550 ns. It is priced at $2000 in single quantities, though substantial discounts are available on high volume (100+) orders. (Piiceon Inc., 2-350 Bering
Drive, San Jose, CA 95112, USA. Tel: (408) 946 8030)
64k serial memory The F264 device is a buried channel memory fabricated in large volumes using Fairchild's double-poly N-channel isoplanar process. It is a 65 536-bit dynamic serial memory configured as 16 shift registers, each 4096 bits long, which can be accessed randomly. Each of the shift registers uses chargecoupled device (CCD) techniques with an interlaced serial-parallel-serial register structure which offers low power demand linked with high density characters. This dense structure allows memory to be mounted in a standard 16-pin dual-in-line package, a feature that
vol 5 no 4may 1981
The PKW-5000 is an EPROM programmer from Sinclair Electronics. It has an 8-bit ZSO CPU and 16k dynamic RAM and will program almost all EPROMs from 4 to 32 kbyte, using the RAM buffer method. The PKW-5000 features a slide switch for the simple selection of ROM type. An optional board is available which can be quickly and easily installed by the user, enabling it to interface with virtually any terminal or I/0. (Sinclair Electronics Ltd, London Road, St Ires, Huntingdon, Cambs. PEI 7 41-1/, UK. Tel: (0480)
64646)
167