website/content/museum/siemens-sme.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
Siemens SME	Computers	Professional Computer	Germany	1978	Intel 8085	name image company company_name specs tabs forum_thread photos hardware screenshots oc_id source SME /media/museum/photos/siemens_sme_system_1.jpg /companies/siemens Siemens label value NAME SME label value MANUFACTURER Siemens label value TYPE Professional Computer label value ORIGIN Germany label value YEAR 1978 label value BUILT IN LANGUAGE ROM monitor label value KEYBOARD Full-stroke 62 keys managed by an Intel 8741 processor label value CPU Intel 8085 label value SPEED 4 Mhz label value CO-PROCESSOR Intel 8080 I/O dedicated label value RAM Up to 64 KB label value ROM 2 KB Boot ROM + 2 KB Monitor label value TEXT MODES 80 columns x 25 rows label value GRAPHIC MODES Text only label value I/O PORTS Multibus expansion slot label value BUILT IN MEDIA 8'' floppy drive label value OS ISIS operating system label value POWER SUPPLY Built-in power supply unit label value PERIPHERALS EPROM programmer label value PRICE Expensive! photos hardware software 694 title subtitle text image BACK SIDE DB25 connectors, from top to bottom: - Serial port 1\ - Serial port 2\ - Paper tape puncher\ - Paper tape reader\ - Parallel printer\ - Eprom programmer Left connector and cable go to the keyboard. /media/museum/photos/siemens_sme_back_1.jpg title subtitle text image MOTHERBOARD **(1)** RAM memory chips area\ **(2)** 8202 RAM controller chip\ **(3)** 8219 bus controller chip\ **(4)** EPROM chip holding the monitor program\ **(5)** 8085 processor\ **(6)** 8259 Programmable interrupt controller chips\ **(7)** 8251 Programmable communication interface (USART) chips\ **(8)** 8253 Programmable Interval Timer chip\ **(9)** Data switches and leds. /media/museum/photos/siemens_sme_motherboard_2.jpg title subtitle text image F.D. CONTROLLER CARD #1 These 2 boards (#1, #2)were necessary to connect a floppy drive to the MDS.\ the controller was built around Intel's Series 3000 computing elements and had 4 MMI 6340 NiCR 512x8 PROMs for "firmware".\ Data transfer is done using DMA. /media/museum/hardware/siemens_sme_fdcard_1.jpg title subtitle text image F.D. CONTROLLER CARD #2 /media/museum/hardware/siemens_sme_fdcard_2.jpg title subtitle text image ISIS O.S. ISIS Operating System label, and directory of the ISIS system diskette! /media/museum/software/siemens_sme_isis-os_1.jpg 711 url date https://web.archive.org/web/20230603012045/http://www.old-computers.com/museum/computer.asp?c=711 2023-06-03

In the late 70s Siemens licencied the Intel 8080 processor and became a 8080 chip second source European manufacturer.

After having translated the 8080 user's manual to German, they marketed the SME development system ( Siemens Microcomputer Entwicklungssystem) which was the same system as the Intel Intellec Series 2 MDS (Microcomputer Development System). The system had a 8080 processor in its first version, later an Intel P8080A-2 (an increased-speed 8080), then finally a 4 MHz. 8085.

For the major part, the SME was made by Intel in USA. The only difference between Intel and Siemens systems was the cabinet colour: grey for Siemens's, blue for Intel's.
The SME system was very popular with german 8080 /8085 hardware and firmware developers.

Thanks to Gottfried Silberhorn from Germany for information and pictures.

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.