CompuPro RAM20 S-100 Board, Godbout Electronics Oakland,64 x MM2147N Made in USA
In perfect condition !
Sell as is due its age !
The RAM-20 was a high speed (10 MHz), low power (about 1.5 Amps on 8V), 32K byte static RAM board designed to conform to IEEE spec 696 for the S-100 bus. The RAM-20 could be configured as a conventional Bank Select board (compatible with Cromemco and North Star etc. Bank Select schemes), as an Extended Address board (compatible with the 8088 CPU or with CompuPro memory management hardware), or as a Global memory board. The board was addressable as a single 32K block which may begin at any 4K address within a 64K page. Within that selected 64K page, the board addressing would, if necessary, ‘wrap around’ from the top of RAM to the bottom. Also within the 64K page, up to 8 4K ‘windows’, or unoccupied address spaces, may be created manually through an 8 paddle DIP switch provided for this purpose. The RAM-20 was shipped as a 16K, 24K, or a full 32K board. Partially populated boards may be upgraded simply by inserting additional 5257/2147 type RAM IC’s into pre-installed DIP sockets (all boards came with all 64 RAM IC sockets wave soldered in place.) Extra heavy duty power traces, generous bypassing of supply lines, sockets for all integrated circuits, careful layout, innovative design conservatively implemented, premium parts, and a double sided, solder-masked printed circuit board with complete component legends made this a versatile, dependable, high performance memory board. Since dense memory were among the most costly items in any S-100 installation, using the RAM-20 as the heart of a system insured that the transition to faster CPU’s and/or more sophisticated memory management software would be as easy and inexpensive. Because of the board’s extremely low power consumption, numerous RAM-20’s could be combined without over heating the system or exceeding the capacity of the system power supply.
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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