GRiD System Corporation made some of the neatest, wackiest computers out there. GRiD was purchased by Tandy some time back, then more recently purchased by AST. Although no more GRiD products are being made (as far as I know), AST still provides technical support for many GRiD products and maintains a file support library on their web page. GRiD made a lot of portables, mostly pen-based units. The majority feature the trademark black case manufactured out of super-rugged injection molded high impact plastic and magnesium alloy. GRiD, by far, made the coolest gear out there.

The GRiDpad models 1911, 1912, and 1930 were some of the first IBM compatible penbased units made by GRiD. They are the same size as most notebook computers and feature an NEC V20 CPU operating at 9.54 and 4.77 MHz. These units boot DOS from their 256 or 512k flash ROM, have a tethered pen, 2 MB RAM, and an on-screen keyboard. The GRiDpad RC (1911) and RF (1930) have two PCMCIA slots for type I or JEIDA memory storage cards (SRAM/FLASH) while the GRiDpad HD (1912) has a 20 MB Hard Drive in place of one of the PCMCIA slots. The RF model features a radio modem while the others feature mostly only 2400 BPS modems, however there were a few 14.4's out there too. The GRiDpads have 5 round buttons to the left of the screen that control certain basic functions such as backlight control, as well as a larger suspend/resume button. One of the large differences between these original GRiDpads and later GRiDpad models are 640x400 (CGA) durable backlit transreflective blue LCD screens. These screens are super-strong (glass?) and practically unscratchable, even by the brass tipped stylus. I have yet to see a scratched, cracked, or broken GRiDpad 19xx series screen.

I have documentation on hand for the GRiDpad 19xx series so e-mail me if you have any questions. I am looking to obtain a GRiDpad HD and a GRiDpad RF (working or not, complete or incomplete, parts, etc).

	`GRiD 1910 - SPECIFICATIONS`
`MODEL #`	`DIFFERENT MODELS`
1911	GRiDpad RC (2 PCMCIA Memory Slots)
1912	GRiDpad HD (Hard Disk & 1 PCMCIA Memory Card Slot
1930	GRiDpad RF (Radio Modem & 2 PCMCIA Memory Card Slots)
`ITEM`	`SPECIFICATIONS`
CPU	NEC V20 operating at 9.54 or 4.77 MHz
DISPLAY	10" diagonal backlit transreflective blue LCD, 640x400 CGA Compatible display with an aspect ratio of 1:1
MEMORY	2 MB RAM - 640k conventional and 1,408k expanded (EMS) memory
STORAGE	[standard]MS-DOS ROM - 256k or 512k of internal Flash EPROM storage for MS-DOS operating system and GRiDpad utility programs [standard]Internal Storage Card Slot - Accepts 68 pin PCMCIA/JEIDA standard storage cards (works with storage cards only, NO MODEMS) [model 1912]Hard Drive - 20 meg internal 2.5" IDE Hard Disk Drive [model 1911 & 1930]Second Storage Card Slot - Provides a second slot for a storage card
`Modem`	`Communications`
US MNP 2400 bps	Option M00-0902 - Internal Hayes-compatible modem with MNP levels 2 through 5
UK MNP 2400 bps	Option M00-0903 - Same as above for use in the United Kingdom
US MNP 2400 bps/FAX	Option M00-0535 - Same as M00-0902 plus 9600 bps send/receive Group III facsimile
US V.32bis/V.42bis 14.4	Option M00-0538 - Internal Hayes-compatible modem with V.42 and MNP levels 2 through 4 error correction and V.42bis and MNP level 5 data compression, plus 9600 bps send/receive Group III facsimile
Radio Modem	GRiDpad RF Only - Compatible with Novell Netware 2.2. Provides 500 mW, 242 kbps direct sequence spread spectrum radio with a range up to 500 feet. Provides three independent channels. Operates in the 902-928 MHz frequency band. Supports Carrier Sense Multiple Access with Collision Avoidance.
`Connector`	`Interfaces`
Serial Port	RS-232C 9-pin with support for barcode readers
Keyboard Port	5 pin connector for IBM XT-compatible keyboard using included keyboard adapter
Phone Jacks	(Optional) One or two modular telephone jacks for internal modem and telephone (RJ-12C jacks)
External Bus	Provides for system expansion
Power Connector	9 to 18 Volts DC with positive in the center and ground on the outer rim
`Part`	`Physical Characteristics`
Case	High-Impact Plastic
Weight	4.7-5.1 lbs with battery
Dimensions	(h)1.4" x (w)9.25 x (l)12.4"
Shock Tolerance	10g when operation, 100g when not operating

Below is a diagram of the GRiD model 1910 series keyboard connector. It looks like a PS/2 keyboard connector with one pin missing but it's not, the difference is it has an altered pinout configuration. The diagram below has all the info you need to modify a keyboard.