Pin Diagram of 8087 Math Coprocessor - 8087 Math Coprocessor - Microprocessors | Summary and Q&A

TL;DR

This video explains the pin diagram and functions of the 8087 math coprocessor used for complex arithmetic and trigonometric calculations with the 8086 and 8088 microprocessor family.

Key Insights

• 👪 The 8087 math coprocessor was designed to enhance the computational capabilities of the 8086 and 8088 microprocessor family by accelerating complex calculations.
• 🫥 The pin diagram of the 8087 math coprocessor consists of 40 pins with various functions, including power supply connections, address and data lines, status lines, interrupt signals, and clock signal.
• 🫥 Different status lines on the 8087 math coprocessor provide information about the microprocessor's operations and the status of the instruction queue.
• 📡 The coprocessor communicates with the microprocessor using signals like READY, BUSY, INTERRUPT, and REQUEST/GRANT signals.
• 😥 The 8087 math coprocessor is known by different names, including floating point unit, math coprocessor, and numeric processor extension.
• 🐎 It effectively offloads complex arithmetic and trigonometric calculations from the microprocessor to improve overall processing speed.
• ⏰ The coprocessor's clock signal provides basic timing and synchronization for the processor's operations.

Transcript

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Questions & Answers

Q: What is the purpose of the 8087 math coprocessor?

The 8087 math coprocessor is used to speed up complex arithmetic and trigonometric calculations that cannot be performed by the 8086 and 8088 microprocessors. It offloads these calculations to improve overall processing speed.

Q: How does the 8087 math coprocessor communicate with the microprocessor?

The 8087 math coprocessor uses pins such as READY, BUSY, and INTERRUPT to communicate with the microprocessor. These signals indicate the coprocessor's readiness, busy status, and occurrence of interrupts during data execution.

Q: What are the status lines on the 8087 math coprocessor?

The status lines, including S0, S1, and S2, provide information about the microprocessor's current operation, such as memory read, memory write, or passive operations. They are used by the bus controller to generate appropriate memory and read/write signals.

Q: How does the instruction queue work with the 8087 math coprocessor?

The QSN (Q Status Not) and QS1 (Q Status One) pins indicate the status of the instruction queue. Different combinations of high and low values on these pins represent operations like fetching the first byte of an opcode, emptying the queue, or fetching subsequent bytes.

Summary & Key Takeaways

• The 8087 math coprocessor was developed by Intel to work with the 8086 and 8088 microprocessors for complex calculations.

• It is also known as the floating point unit, math coprocessor, and numeric processor extension.

• The pin diagram of the 8087 math coprocessor consists of 40 pins with various functions, including power supply connections, address and data lines, status lines, interrupt signals, and clock signal.