Peraso Inc. — Director's Dealing 2006

May 20, 2006

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC SYSTEM TECHNOLOGY INC (mosy)
CIK: 0000890394
Period of Report: 2006-05-18

Reporting Person: LEUNG WING YU (Director, Executive VP and CTO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2006-05-18	Common Stock	S	10000	$8.28	Disposed	605680	Direct
2006-05-19	Common Stock	S	15000	$8.22	Disposed	590680	Direct

Footnotes

F1: The reported sales of shares of Common Stock were made pursuant to a plan intended to comply with Rule 10b5-1 (c) under the Securities Exchange Act of 1934, as amended.

F2: In addition, Wing-Yu Leung's wife owns 17,900 shares. He has no pecuniary interest in any of these shares and disclaims beneficial ownership of them.