Editing Intel 8085 (section)

===Development system===
{{Main|Intel system development kit}}
Intel produced a series of development systems for the 8080 and 8085, known as the MDS-80 Microprocessor System. The original development system had an 8080 processor. Later 8085 and 8086 support was added including ICE ([[in-circuit emulator]]s). It is a large and heavy desktop box, about a 20" cube (in the Intel corporate blue color) which includes a CPU, monitor, and a single 8-inch floppy disk drive. Later an external box was made available with two more floppy drives. It runs the [[ISIS (operating system)|ISIS]] operating system and can also operate an [[emulator]] pod and an external [[EPROM]] programmer. This unit uses the Multibus card cage which was intended just for the development system. A surprising number of spare card cages and processors were being sold, leading to the development of the Multibus as a separate product.

The later iPDS is a portable unit, about 8"{{times}}16"{{times}}20", with a handle. It has a small green screen, a keyboard built into the top, a 5¼ inch floppy disk drive, and runs the ISIS-II operating system. It can also accept a second 8085 processor, allowing a limited form of multi-processor operation where both processors run simultaneously and independently. The screen and keyboard can be switched between them, allowing programs to be assembled on one processor (large programs took a while) while files are edited in the other. It has a [[bubble memory]] option and various programming modules, including EPROM, and [[Intel 8048]] and [[Intel 8051|8051]] programming modules which are plugged into the side, replacing stand-alone device programmers. In addition to an 8080/8085 assembler, Intel produced a number of compilers including those for [[PL/M|PL/M-80]] and [[Pascal programming language|Pascal]], and a set of tools for linking and statically locating programs to enable them to be burned into [[EPROM]]s and used in [[embedded system]]s.

A lower cost "MCS-85 System Design Kit" (SDK-85) board contains an 8085 CPU, an 8355 ROM containing a debugging monitor program, an 8155 RAM and 22 I/O ports, an 8279 hex keypad and 8-digit 7-segment LED, and a TTY (Teletype) {{val|20|ul=mA}} current loop serial interface. Pads are available for one more 2K×8 8755 EPROM, and another {{val|256|ul=byte}} RAM 8155 I/O Timer/Counter can be optionally added. All data, control, and address signals are available on dual pin headers, and a large prototyping area is provided.