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July 4, 1991updated 06 Sep 2016 2:31pm


By CBR Staff Writer

PS/2 Model 35SX, 35LS

The PS/2 Model 35 SX uses an Intel 80386SX microprocessor operating at 20MHz with zero to two wait states and includes parallel, serial and pointing device ports, as well as support for a 1.44Mb disk drive, Maths Co-Processor socket, and three single in-line memory module sockets, two of which are available for memory expansion. It is a 3-slot 2-bay system and is offered either with a floppy or 40Mb fixed disk, and all models have 2Mb of memory standard on the system board, expandable to 16Mb. Model 35 LS is designed for local area networks, and it has the standard features of the Model 35 SX, except that there are no fixed disks and a 16/4 Token-Ring adaptor occupies one of the three adaptor slots. Costs range between $2,000 and $2,700.

PS/2 Model 40 SX

The PS/2 Model Model 40 SX also uses Intel’s 20MHz 80386SX microprocessor and it ships with 2Mb system board memory, expandable to 16Mb on the motherboard. There are 3.5 disk options, five slots, four bays, and 16-bit video graphics array. It has parallel and serial ports, a pointing device and VGA port. There is support for a 1.44Mb disk drive, a Maths Co-Processor socket, and three single in-line memory module sockets, two for memory expansion. It is available as either a floppy only model or with 40Mb and 80Mb fixed disks. There are two new 8Mb memory module options and the 8Mb Memory Module Kit-80nS contains 8Mb of 80nS memory on a single in-line memory module, and there is a 70nS version. The kits are supported on PS/2 Models 35 SX, 35 LS, 40 SX, 57 SX, 90 XP and 95 XP, and Models 90 XP and 95 XP support up to 64Mb of memory on the system board. The 40 SX is $2,400, $2,925 or $3,200, and the 40Mb hard disk is $700, while the 80Mb version is $1,060. The 70nS kit is $2,195 and the 80nS version is $2,000.

PS/2 Model 55 SX

New models of the PS/2 Model 55 SX have 4Mb standard memory, a 32-bit microprocessor with the capability of supporting up to 16Mb of system memory and a 40Mb or 80Mb fixed disk drive. Additional functions include a 1.44Mb 3.5 disk drive, several ports, and three input output slots. Standard memory for the PS/2 Model 55 LS is increased to 4Mb with the capability of supporting up to 16Mb of memory. Available June 11, Models 55 SX and LS cost $2,945 and $2,745.

PS/2 Model 57 SX

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IBM says that the PS/2 Model 57 SX is a Micro Channel system designed to complement and enhance the PS/2 Model 55 SX, Model 65 SX, and the low end of the Model 70 386 family. It provides a 20MHz 80386SX microprocessor, and the two models are offered with SCSI fixed disk capacities of 80Mb and 160Mb. The Model 57 SX has five-slot, four-bay mechanical package that has five 16-bit slots for Micro Channel adaptors and four bays for input output devices. Two bays contain a 3.5 2.88Mb disk drive and a SCSI fixed disk. The SCSI controller is integrated in the motherboard, and up to seven SCSI devices can be attached. The system ships with a 4Mb single in-line memory module and the Model 57 SX supports up to 16Mb of 70-ns memory on the motherboard in three sockets. The new PS/2 57 SX machines cost $3,625 and $4,195.

PS/2 Model 70 386 – 081, 161, A81 and A16

New models of the Micro Channel PS/2 Model 70 386 have 4Mb of standard memory and a 32-bit microprocessor that supports up to 16Mb of high-speed real memory. The 80386 processor models 081 80Mb and 20MHz, 161 – 160Mb and 20MHz, A81 – 80Mb and 25MHz, and A16 – 160Mb and 25MHz are said to enhance ESDI files and support the addition of an 80387 optional Maths Co-Processor. Models PS/2 70 386 8570-A81 and A16 upgrade to the 25MHz i486 processor by the installation of the 486/25 Power Platform. Available June 11, the 081 and 161 cost $4,095 and $4,745, the A81 and A16 are $5,845 and $6,445 each.

3.5 Rewritable Optical Drive, 128Mb Cartridge, Optical Drive Kit A

The PS/2 3.5 Rewritable Optical Drive is a new SCSI storage device that offers a transfer rate of 4.3Mb per second, 66mS average seek time and 127Mb capacity in a half-high package. The erasable optical drive accepts either a single-sided re

movable 3.5 magneto-optical cartridge that can be written and read many times, or a 3.5 optical read only memory. It can be installed in PS/2 Models 57 SX, 60, 65 SX, 80, 90 XP, 95 XP, 3510 and 3511. When combined with either of the PS/2 SCSI enclosures it offers optical function to any PS/2 Micro Channel desktop or floor-standing system with a SCSI adaptor installed. The 128Mb Rewritable Optical Cartridge is a 3.5 magneto-optical medium with a formatted capacity up to 127Mb and it can be written and read many times. IBM says it can be used for online off-line data storage, back-up and restore, or software distribution. The Optical Drive Kit is designed and required to support the installation of a 3.5 Rewritable Optical Drive in PS/2 Models 60 and 80-041, 071, 111 and 311 with a Micro Channel SCSI adaptor installed. Available June 11, the optical drive costs $1,800, and the Drive Kit is $29. The Rewritable Cartridge costs $70 per cartridge in a single pack, or $63 in five-packs.

PS/2 2.88Mb Disk Drive

The 2.88Mb disk drive is a 3.5 by 1 high drive that has up to 2.88Mb of formatted capacity when a 3.5 4Mb disk is installed. Also, it maintains read-write compatibility with 720Kb and 1.44Mb drives, and is usable with the PS/2 Models 35 SX and LS, 40 SX, or 57 SX. Available June 11, it costs $325.

PS/2 2.3Gb External SCSI Tape Drive

The 2.3Gb External SCSI Tape Drive can be attached to any PS/2 Micro Channel system equipped with either a Micro Channel SCSI Adaptor or a Micro Channel SCSI Adaptor with Cache. It has an instantaneous data transfer rate of 245Kbytes per second and stores up to 2.3Gb of data on one 8mm tape cartridge. Available June 11, the Drive costs $6,915.

40Mb, 80Mb Fixed Disk Drives

The 40Mb and 80Mb Fixed Disk Drives can be used to upgrade a PS/2 Model 55 LS, which is a diskless system for a local area network environment. Available June 11, the 40Mb is $700, the 80Mb $1,060.

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