Vintage OKI MSC2331A-80YS3 256KB 30-Pin SIMM FPM Parity RAM (80ns) Memory Module NOS

Condition
Rare early-1990s NOS OKI memory module from laboratory stock. Looks unused. Clean PCB, bright contacts, no corrosion. Single-sided 3-chip layout. Fitted with 2x OKI M514256A-80J (256Kx4 FPM DRAM) + 1x OKI M51C256-80 (256Kx1 parity). Tested in a 30-pin SIMM diagnostic board. Stored dry; anti-static handling.

Item specifics
Brand: OKI (Oki Semiconductor / Japan)
Model / Part No.: MSC2331A-80YS3
Type / Function: 30-pin SIMM DRAM memory module
Capacity: 256 KB (256K x 9 configuration with parity)
Memory Type: FPM DRAM (Fast Page Mode)
Speed: 80 ns
Voltage: 5 V
Width: 8-bit + parity (non-ECC)
Form Factor: 30-pin SIMM, single-sided
Chip Manufacturer: OKI Japan
Country/Region of Manufacture: Japan
Unit Quantity: 1

What you get
1 xOKI MSC2331A-80YS3 256KB 30-pin FPM parity SIMM (the exact module shown in the pictures).

Notes
Original early-1990s OKI MSC2331A-80YS3 256KB FPM DRAM SIMM with parity. Built with OKI 80ns 256K DRAM chips used in many 286, 386, and early 486 PCs, workstation memory upgrades, printers, and industrial/lab equipment using 30-pin SIMM sockets. Compatible with motherboards requiring 30-pin 256KB parity SIMMs, including some early Macintosh, Amiga, and Atari expansion cards. Also commonly found in industrial PCs, measurement instruments, laboratory devices, and printer controllers.

Shipping
Worldwide shipping.
Ships within 1 business day from Spain.
Local pickup: Estepona (29680), Spain.

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