64 K on the 16 K Dynamic RAM card - 524 288 bits = (8 x 64 k) — (8 x 16k)

64 k on the 16 k Dynamic RAM card elektor september 1983 It has been more than a year since we published the dynamic RAM card (April 1982, Elektor No. 84), but it is proving to be very popular. Many readers have asked about the possibility of replacing the eight 16 k memory ICs with 64 k chips. Many people suggested how this could be done and all these ideas prompted us to investigate the feasibility. What we came up with is a sort of check list of modifications, which you can tick as you go along. 64k on the 16k Dynamic RAM card 524 288 bits = (8 x 64 k) — (8 x 16k) Figure 1. This is the pin designation for a 4164 dynamic RAM IC. Com- parison with a 4116 shows that they are pin compa- tible except for pins 1, 8 and 9: an extra address line is added (A7) and the —5 V and +12 V supplies are removed. from an idea by K. D. Lorig We have often thought that we are rather fortunate since electronic components are one of the very few commodities that actually decrease in price. This ...