#Omnikey ultra Pc#
The keyboards were particularly valued for their tactile response and durability, and along with IBM's Model M PC keyboards, were considered some of the best in the industry. The company was known for its quality systems and keyboards in particular, its line of OmniKey keyboards was highly praised. Aside from Dell and Gateway, popular brands of mail-order PCs were Northgate and Zeos.
This was a revolutionary idea at the time, because people wouldn't be able to see or touch their computer before buying it. Consumers were fed up with high prices for IBM, Compaq and other brand-name PCs sold through dealers so they opted to purchase their computers from a catalog. The 1990s were a golden era for mail-order PC business. Northgate Computer Systems, Inc., based in Eden Prairie, Minnesota, United States, was a mail-order personal computer company, founded in 1987 by Arthur "Art" Lazere. This should give you the background information you requested.A circa 1993 model Northgate OmniKey/ULTRA-T. It is by Dave Dribin titled: Keyboard Matrix Help dated June of 2000. Now here is some more information about ways to 'correct' problems with the keyboard matrix and decoding.
#Omnikey ultra pdf#
Source: Semtech Documentation - SH703-600 data sheet PDF file, page 4.
#Omnikey ultra serial#
Once the key is verified, the corresponding key code(s) are loaded into the transmit uffer of the serial communication channel Each key found pressed is debounced for a period of 20 ms. A key closure is detected as a zero in the corresponding position of the matrix.Ī complete scan cycle for the entire keyboard takes approximately 9.2 ms. When active, the encoder selects one of the column lines (C0–C15) every 512 µS and then reads the row data lines (R0–R7). The SH703-600 provides internal pull-ups for the row input pins. Smaller size matrixes can also be accommodated simply by leaving unused pins open. The encoder scans a keyboard organized as an 8 row by 16 column matrix for a maximum of 128 keys. A bit radical perhaps? Reply 1 of 14, by eL_PuSHeR Otherwise the placement of the keys echos the alternative keys of the numeric keypad. The 13 canonical keys are placed very unusually, although I like the large insert and delete keys down where they are not likely to be hit by accident. The Ultra has four extra keys in addition to the 13 keys normally found there. However, I feel less enthusiastic about the keys between the keyboard and keypad. Also, the space in between the Ctrl and Alt keys is used by an * key, which is not necessary. The numeric keypad's big + key has been split into small + and = keys. I'm not so enthusiastic about the right side of the keyboard.
The Esc is where the Tilde key normally is, the Ctrl takes the place of the Caps Lock and the Alt key does the same for the Ctrl key. Unlike either it has two sets of function keys and a better layout for certain keys. Like the 101 it has an enlarged backspace key and puts the backslash key to the right of the left shift key. Like the IBM AT, the Ultra has an inverted L shaped Enter key, function keys down the left hand side and a Ctrl key to the right of the A key and the Alt key two keys down. To my mind, the closest thing to a perfect keyboard is the Northgate OmniKey Ultra, which combines the best features of the 84-key AT keyboard with the 101-Enhanced PS/2 Keyboard and improves on both. Moreover it is heavy and has buckling spring keyswitch technology for excellent tactile response.īut it is not a perfect keyboard. Not only is it the layout that every PC programmer assumes that the user is using, few if any assume that the user is using more than the 101 keys of this device. The first is the IBM Model-M 101 Enhanced Keyboard, the right, proper and true keyboard every keyboard afterwards is based on.
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