The HD64180 is a Z80-based embedded microprocessor

Microprocessor

A microprocessor incorporates the functions of a computer's central processing unit on a single integrated circuit, or at most a few integrated circuits. It is a multipurpose, programmable device that accepts digital data as input, processes it according to instructions stored in its memory, and...

 developed by Hitachi

Hitachi, Ltd.

is a Japanese multinational conglomerate headquartered in Marunouchi 1-chome, Chiyoda, Tokyo, Japan. The company is the parent of the Hitachi Group as part of the larger DKB Group companies...

 with an integrated memory management unit

Memory management unit

A memory management unit , sometimes called paged memory management unit , is a computer hardware component responsible for handling accesses to memory requested by the CPU...

 (MMU). The Hitachi HD64180 "Super Z80" was later licensed to Zilog and sold by them as the Z64180 and with some enhancements as the Zilog Z180

Zilog Z180

The Zilog Z180 8-bit processor is a successor of the Z80 CPU. It is compatible with the large base of software written for the Z80. The Z180 family adds higher performance and integrated peripheral functions like clock generator, 16 bit counters/timers, interrupt controller, wait-state generators,...

.

It has the following features:

• Memory Management Unit (MMU) which supports 512k bytes of memory, and 64k bytes I/O space
• 12 new instructions were added
• Two channel Direct Memory Access Controller (DMAC)
• Programmable wait state generator
• Programmable DRAM
  Dram
  Dram or DRAM may refer to:As a unit of measure:* Dram , an imperial unit of mass and volume* Armenian dram, a monetary unit* Dirham, a unit of currency in several Arab nationsOther uses:...
  
   refresh
• Two channel Asynchronous Serial Communication Interface (ASCI)
• Two channel 16-bit Programmable Reload Timer (PRT)
• 1-channel Clocked Serial I/O Port (CSI/O)
• Programmable Vectored Interrupt Controller

The Micromint SB180 and SemiDisk Systems DT42 CP/M

CP/M

CP/M was a mass-market operating system created for Intel 8080/85 based microcomputers by Gary Kildall of Digital Research, Inc...

computers were based on the Hitachi HD64180.

External links

• List of all Hitachi 64180 processors with their clock frequencies.