The IIS Chip Gallery

Toy2 (1987)

Additional pictures below, click to see larger versions



by

Pascal Dornier, Stephan Paschedag, Hansruedi Heeb

Main Details

Application	Processor
Technology	3000
Manufacturer	Faselec
Type	Semester Thesis
Package	DIP40
Dimensions	3200μm x 2400μm
Gates	800
Voltage	5 V
Clock	4 MHz

Description

Toy/2 is a simple 16-bit microcontroller, based on the Toy processor described by Phil Koopman in Byte 1987. The original design has been improved by:

• A simple pipelining is introduced, the instruction is executed while the next instruction is being fetched.
• The program counter is incremented using the main ALU
• The instruction set was enhanced
• Indirect jump instructions support more than 4K address space.

Toy/2 does not have any subroutine calls, a stack or support for interrupts. one other problem is that instructions occupy too much space (i.e. jump instruction requires 4 Bytes).

The cute logos on the drawing do not seem to be on the physical chip.

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