You're looking for a PDF on microprocessors by Nilesh B. Bahadure. Here's some information on the topic:

8255

A significant portion of the text is dedicated to support chips, such as: : Programmable Peripheral Interface. 8253/8254 : Programmable Interval Timer. 8259 : Programmable Interrupt Controller. Finding the Content Legally

The book starts with the 8-bit 8085, explaining its pin diagram, register structure, and timing diagrams. This serves as the foundational block for understanding how a CPU fetches and executes instructions. The Intel 8086

Interfacing & Peripherals

: Insights into math coprocessors (8087) and various peripheral controllers like the 8255, 8259, and 8237.

The book covers several critical topics often found in university syllabi: Hardware Signals : Understanding

Chapter 1

Do not jump to programming. Spend a week on . Draw the internal architecture of 8085 five times. Label the buses (Address, Data, Control). Memorize the pin functions (READY, HOLD, ALE).

While I cannot provide a direct PDF download link due to copyright policies, you can typically find this resource through the following legitimate channels: University Libraries