RM Nimbus Memory Expansion Card
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This card contains 512K of memory, and is added to the RM Nimbus PC to extend the onboard memory which would normally have been 512K. There are sockets to add another 512K to this card giving a total of 1.5M. As the 80186 processor could only access 1024K of memory due to the number of address lines it has, the final 512K could only be access by internal hardware as a RAM disk. It can only be used in the Nimbus PC. Later Nimbus PC-186 machines required a smaller card due to the reduced size of the case.
RM PN
PCB - 12859
Complete Card 512K 12863
Date : UnknownManufacturer : Research Machines Format : Expansion Board Physical Description : Memory Module PCB with 512K memory This exhibit has a reference ID of CH48206. Please quote this reference ID in any communication with the Centre for Computing History. |
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