News:

2026.08.23 The "Files" area is now visible to guests/spiders

Main Menu

MMU Static RAM - IMS1420 / MBM2148

Started by sigma7, September 27, 2023, 02:27:16 AM

Previous topic - Next topic
Print
Go Down Pages1
User actions

sigma7

September 27, 2023, 02:27:16 AM Last Edit: September 27, 2023, 02:44:17 AM by sigma7
The custom design of the Memory Management Unit on the Lisa CPU board uses three high speed (55ns) 1024x4 SRAM chips.

These may be IMS1420-55, MBM2148-55 or equivalent parts.
Warning: Memory errors found. ECC non-functional. Verify comments if accuracy is important to you.
Print
Go Up Pages1
User actions