Processor Technology Inc. 8K Static Ram S-100 Board, 8KRA Static Memory Module
In perfect condition !
Sell as is due its age !
The 8KRA Static Read/Write Memory Module had a capacity of 8K and operated in a static mode. This was an early non-IEEE 696 S-100 RAM board. As opposed to dynamic memories, the 8KRA needed only one power supply and did not require periodic refreshing.
All address and data lines were fully buffered, and extensive noise immunity circuitry was built into the memory. The board featured a switch selectable address selection which allowed its starting address to be offset in 1K increments from zero to 65K.
Maximum worst case access time for the 8KRA was 520 nsec. Thus, in any 8080 system, its memory would operate at the same speed as any other memory with an access time between 50 and 520 nsec. Both the access time and non-refresh features of the 8KRA meant no computer “waiting” time was required.
The 8KRA Memory was plug-in compatible with the Altair 8800 bus. It required +7.5 to +10 V dc at 1.9 amp (max.) for its operating power. In addition, the low power memory IC’s used on the module could operate in a low power (+1.6 to 2.5 V dc at 0.9 amp max.) standby mode. Data loss from the 8KRA during loss-of-power or power interrupt conditions could consequently be prevented by using two “D” size batteries for standby power. Provisions for easily adding this standby capability were incorporated in the module design.
Shipping :
Europe : The price is for Air Priority Shipping with tracking number – takes about 8 – 15 working days !
USA and other Countries : The price is for Air Shipping with tracking number – takes about 15 – 25 working days !
Shipping Information:
Every Item is carefully packed and put in special box or special envelope for that use. We use our Bulgarian Post Services to send The Items Abroad. They are very reliable and good working. Every Item We send has an Tracking Number and can be tracked all over the World.
Return Policy Details:
We Accept Money Back and Replacement. The Important thing is the Buyer to be satisfied ! Please if you have any questions feel free to ask us. We will answer them As soon as we can. Wish you all best from Bulgaria !
Feedback :
Dear Customers, the Computer Parts we sell are about 20 years old. We test them twice – one time before the listing and one after the Item is Sold. We packed them with anti-static bags and put them in boxes.
Please if you have any issues with the parts when you test them contact us before leaving an feedback and We will do everything to help you !
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