Slide 54 of 89
This core memory gives an idea of the increase in density compared with the 6600 for the Small Core Memory (SCM) of 64K words… or 1/2 the size of the 6600. This is totally counter-intuitive to what we would expect. However, the speed was accomplished by the operation with the LCM. Access time for the SCM was 4 clock cycles and cycle time, 10 clocks.
Thirty-two overlapping memories had an aggregate bandwith of 36 x 32 or 1152 Mwords per second for a computer that operated at 36 Mega-ops.
The Large Core Memory required 64 clock cycles, so transfers between LCM and SCM occurred in packets of 8 words to more closely match the performance of the SCM.