Memory
The machine's read-write store: a 2048 words coincident-current ferrite core array wired in 32 by 64 planes with no splices in the wires, for reliability.
| Metric | Value | Evidence | Basis | Method | Source |
|---|---|---|---|---|---|
| Memory capacity (words) memory | 2048 words | Confirmed | Vendor-rated | Design capacity Stated by the vendor Coincident-current ferrite core array wired in 32 by 64 planes. The first eight locations are central and special registers rather than general storage. |
18×
a ÷ b ratio v1 Compares memory-capacity-words at memory scope, obtained by design-capacity. Valid only within this comparability group, and reported to 4 significant digits — the precision of the least precise input.
2048 words
a + b + … sum v1 Adds 1 memory-capacity-words figure obtained by design-capacity. Left out: 36 864 words (woven at manufacture and unwritable in flight, so it is storage the machine reads from rather than memory it works in). A total is only as trustworthy as the decision about what belongs in it, so both the terms and the exclusions are named records.
Shares the fixed memory's 11.7 µs cycle time, which is leisurely for a core array and leaves time between read and write for incrementing and shifting during memory-cycle stealing. Block II doubled the capacity from Block I's 1024 words.