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The PPI 8255 
( of the MZ-700 )  
The PPI 8255 of the MZ-700

This is the MZ-700's Programmable Peripheral Interface ( PPI ). It controls the keyboard, tape recorder, sound, clock interrupt, and the cursor.

PPI 8255
Circuit diagram and motherboard mark: 8E
MZ-700 SHARP Service Manual info:

NO. PARTS CODE PRICE
RANK
NEW
MARK
PART
RANK
DESCRIPTION
25 VHiUPD8255/-1 AV   B IC

Download 82C55 technical data sheet ( PDF, 326 KB )

Read the General Overview of the PPI 8255

Read details about the scope of the 8255 in the MZ-700 ( including tape recorder )

Read details about the keyboard functions of the 8255

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last updatedSeptember 20, 2002
sharpmz@sharpmz.org