Service manual

The <REFERENCE>(xma2) memory module has the following features:
• The memory module contains MOS dynamic RAM (DRAM) arrays; a
CMOS memory control gate array that contains error correction code
(ECC) logic and control logic; an EEPROM storage element and an XMI
interface known as the XMI Corner.
• Storage arrays are made up of two or four banks, either 155 or 299
DRAMs.
• ECC logic detects single-bit and double-bit errors and corrects single-bit
errors on 64-bit words.
• Memory self-test checks all RAMs, the data path, and control logic on
power-up.
• Quadwords, octawords, and hexwords can be read from or written to
memory.
• Memory is configured by the console program for 2-, 4-, 8-way or no
interleaving.
MS65A Memory 6–3