SIMM30 8/9-bit 30-pin Single Inline Memory Module. If present, the ninth (parity) bit has separate data I/O and /CAS signals. At one time, SIMMs with soldered-on pins (called SIPs) were also available. Note: A11 is used as a battery connection in the DS2219 nonvolatile DRAM. +-------+ 1 | O | +--+ | VCC == +------+| /CAS == | || D0 == +------+| A0 == +------+| A1 == | || D1 == +------+| A2 == +------+| A3 == | || GND == +------+| D2 == +------+| A4 == | || A5 == +------+| D3 == +------+| A6 == | || A7 == +------+| D4 == +------+| A8 == | || A9 == +------+| A10 == +------+| D5 == | || /WR == +------+| GND == +------+| D6 == | || A11 == +------+| D7 == | Q8 == +------+| /RAS == |Parity|| /CAS8 == +------+| D8 == | VCC == | +--+ | 30 | O | +-------+ [This information is part of the GIICM]