Aerospace Vintage Memory/Logic Boards – LOT OF 4

This listing is for a matched pair of vintage memory/logic boards, perfect for those working with or restoring retro computing systems. Both boards feature a nearly identical layout and are designed with high-quality components from leading manufacturers, making them an excellent addition to your collection or project.

Board 1 – Key Components and Part Numbers:

1. DRAM Chips:

• (x36) 24M4321-12 – High-capacity DRAM modules.
• Likely used for system memory or buffer storage.

2. EPROM Chips:

• (x2) MB914HX – Pre-programmed firmware chips.
• (x1) DW61 – Marked with system-specific firmware or instructions.

3. Intel Chips:

• (x1) P8097 – Intel microcontroller/processor.
• (x1) L1221008 – Likely system controller or interface chip.

4. Oscillator Module:

• KXO-01 – Provides a stable clock signal for timing.

5. Other Components:

• Gold-plated edge connector for system integration.

Board 2 – Key Components and Part Numbers:

1. DRAM Chips:

• (x36) 24M4321-12 – High-capacity DRAM modules, identical to Board 1.
• Designed for memory expansion or processing.

2. EPROM Chips:

• (x2) MB914HX – Matches Board 1, stores system firmware.
• (x1) DW61 – Likely complementary to Board 1 firmware.

3. Intel Chips:

• (x1) P8097 – Microcontroller/processor for data handling.
• (x1) L1221008 – System logic/interface chip.

4. Oscillator Module:

• KXO-01 – Matches Board 1 for synchronized timing.

5. Other Components:

• Gold-plated edge connector for interfacing.

Condition:

• Both boards are visually inspected and appear in good physical condition. Components, soldering, and connectors are intact.
• Note: These boards are sold as-is, untested, and without guarantees of functionality. Ideal for collectors, enthusiasts, or as spare parts for restoration projects.

Potential Uses:

• Memory expansion or logic processing modules for vintage industrial or mainframe systems.
• Great for hobbyists looking to repurpose or study vintage computing architecture.
• Perfect for resale of individual components such as DRAM, EPROM, or Intel chips.

 

Board 3

• Prominent Components:
  • EPROM/ROM Chips:
    • 4 x Chips with handwritten labels (e.g., program storage or system firmware).
    • These are likely custom-programmed chips critical for the board’s specific operation.
  • Logic ICs (74-series):
    • Multiple TTL chips (e.g., 74LS00, 74LS74) for implementing various logic functions.
  • Edge Connector:
    • Standard ISA-type connector for interfacing with older systems or test equipment.
  • Large Blue Connectors:
    • Used for connecting peripheral components or other boards in a larger system.
• Potential Use: This board appears to be part of an industrial control system or computing device, possibly from the 1980s–1990s. It may have been used for logic processing or memory-related functions.

Board 4

• Prominent Components:
  • Intel 8255 PPI Chip:
    • Programmable Peripheral Interface, often used for interfacing microprocessors with peripheral devices.
  • Toshiba TC5565APL-12 SRAM (x2):
    • Static RAM chips for fast, temporary data storage.
  • Logic ICs (74-series):
    • Additional TTL chips for handling logic operations.
  • HM6264LP SRAM Chips:
    • High-capacity SRAM for data storage, often used in embedded systems.
  • Crystal Oscillators:
    • Provide clock signals for synchronizing operations.
  • Edge Connector:
    • ISA-compatible edge connector, indicating legacy use in computing or industrial systems.

Potential Use: This board is likely designed for memory or I/O management in an industrial computing environment. 

FREE THROW IN BOARD WHEN THE LOT IS PURCHASED VALUED AT $750