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GRiDCASE

GridCase 1537EXP
Also known as	GRiD Case , Portable Sagem (France only)[1][2]
Developer	Grid Systems Corporation (1985–1988) Tandy/GRiD Computer Systems (1988–1990) GRiD Defence Systems (1995–present)
Type	Laptop/Tablet PC
Release date	1985; 40 years ago (1985)
Predecessor	Grid Compass II
Website	https://www.griduk.com/products/

GridCase (stylized as GRiDCASE) is a line of rugged tablets and laptops by Grid Systems Corporation released as a successor of the GRiD Compass line. The first model was released in 1985.

1985; low-contrast LCD screen with green background (instead of orange/yellow plasma screen with black background on a Compass laptops).^[4]

This model was based on a MSDOS 2.11 and a bunch of apps burned on ROM that fit in the ROM tray in front.

1986; returning to a plasma screens (but with red/orange text color and wide aspect ratio). The internal power supply can be ejected and a battery-pack is installed in its place.^[5]

3D view: http://vintage-laptops.com/en/grid-case-3

1986; the rugged version of GRiDCASE 3 with electromagnetic protection.

3D view: http://vintage-laptops.com/en/grid-case-tempest

1988; can be equipped with plasma or LCD screen.

Was based on a 286 CPU.

3D view: http://vintage-laptops.com/en/grid-case-1520

Source:^[6]

GridCase 1535EXP

GridCase 1530 series laptop
CPU	Intel 80386 (Intel 80387 optional)
Connectivity	DIN-5 Keyboard, Phone line, RS-232, Parallel, External peripheral, Video, Power 16 V DC[7]

The modification of 1530 – the Grid GRiDCASE 1535EXP is a rugged laptop with a 80386 CPU, an optional 80387 floating-point processor and up to 8 Mbyte of DRAM. It was first flown into space in December 1992 on the STS-53 for use of the HERCULES geolocation device. The 1535EXP was also the first rugged portable PC to attain full TEMPEST accreditation from the NSA.^[3]

Another modification – the Grid GRiDCASE 1537EXP – has another screen (640×480 instead of 640×400, but with less physical size).

The power input is 100–240 V AC 50/60/400 Hz, 80 W. The 400 Hz utility frequency is common on airplanes and submarines.

3D view: http://vintage-laptops.com/en/grid-case-1537e

1990;^[6] This model has an integrated pointing device,^[6] and was based on an Intel 80386sx processor.

The 1550sx version has 4 MB RAM, a 100 MB hard disk, a 1.44 MB floppy drive, a hardly visible B/W VGA-LCD screen, a built in 2400 bps modem and weights 5.5 kg (12 lbs.) without battery or power supply.^[8]

3D view: http://vintage-laptops.com/en/grid-case-1550sx

In the period from 1990–1994, the Tandy Corporation together with GRiD Systems Corporation produced the following models:

GRiD 1450SX – 3D view: http://vintage-laptops.com/en/grid-1450sx

GRiD 1810 – 3D view: http://vintage-laptops.com/en/grid-1810

GRiD 1660 and 1660C – 3D view: http://vintage-laptops.com/en/grid-1660

GRiD 1680 and 1680C – 3D view: http://vintage-laptops.com/en/grid-1680

GRiD 1720, 1750, 1755 – 3D view: http://vintage-laptops.com/en/grid-1755

GRiD 4025N and 4025NC – 3D view: http://vintage-laptops.com/en/grid-4025nc

Reintroduced in 1995 line.

There is also a Tempest version of this model (1580T).

Pentium and pointing stick (initial model, 1995) or Pentium II and touchpad (1580 XGA, 1998).

3D view: http://vintage-laptops.com/en/grid-case-1580

3D view: http://vintage-laptops.com/en/grid-case-1580-tempest

3D view: https://vintage-laptops.com/en/grid-case-1580-XGA

• GridPad
• Grid SE-T
• Grid Lite

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