S-100 bus

E744086
computer bus standard hardware interface microcomputer expansion bus

The S-100 bus is an early microcomputer expansion bus standard, originally used in Altair 8800–era systems, that defined a 100-pin edge connector for modular CPU, memory, and peripheral cards.

Try in SPARQL Jump to: Surface forms Statements Referenced by

Observed surface forms (1)

Surface form Occurrences
S-100 bus systems 1

Statements (50)

Predicate Object
instanceOf computer bus standard ⓘ
hardware interface ⓘ
microcomputer expansion bus ⓘ
addressBusWidth 16-bit (originally) ⓘ
24-bit (later IEEE 696) ⓘ
alsoKnownAs Altair bus NERFINISHED ⓘ
S100 bus NERFINISHED ⓘ
architecture parallel bus ⓘ
connectorType edge connector ⓘ
controlSignals DMA support (later) ⓘ
interrupt lines ⓘ
separate control lines for memory and I/O ⓘ
dataBusWidth 16-bit (later IEEE 696) ⓘ
8-bit (originally) ⓘ
governedBy IEEE 696 standard NERFINISHED ⓘ
historicalSignificance one of the first widely adopted microcomputer bus standards ⓘ
influenced later microcomputer bus designs ⓘ
introducedBy MITS NERFINISHED ⓘ
introducedInProduct Altair 8800 NERFINISHED ⓘ
introducedYear 1975 ⓘ
marketRole enabled third-party hardware ecosystem for early microcomputers ⓘ
numberOfPins 100 ⓘ
operatingSystems CP/M NERFINISHED ⓘ
CP/M-86 (on later 16-bit systems) NERFINISHED ⓘ
popularIn 1970s ⓘ
early 1980s ⓘ
predecessorOf later proprietary PC expansion buses ⓘ
regionOfPopularity Europe NERFINISHED ⓘ
United States NERFINISHED ⓘ
standardizedAs IEEE 696 NERFINISHED ⓘ
standardizedYear 1979 ⓘ
supportedCPU Intel 8080 NERFINISHED ⓘ
Intel 8085 NERFINISHED ⓘ
Intel 8086 (later systems) NERFINISHED ⓘ
Motorola 68000 (via adapter designs) NERFINISHED ⓘ
Zilog Z80 NERFINISHED ⓘ
typicalCardFormFactor plug-in board with 100-pin edge connector GENERATED ⓘ
usedFor CPU cards ⓘ
memory cards ⓘ
microcomputer expansion ⓘ
peripheral interface cards ⓘ
usedIn Altair 8800 NERFINISHED ⓘ
Cromemco systems NERFINISHED ⓘ
IMSAI 8080 NERFINISHED ⓘ
NorthStar Horizon NERFINISHED ⓘ
Vector Graphic systems NERFINISHED ⓘ
various CP/M computers ⓘ
voltageLevels +16 V ⓘ
+8 V ⓘ
±16 V (later variants) ⓘ

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

MITS Altair 8800 → expandabilityInterface → S-100 bus ⓘ
MITS Altair 8800 → introducedBusStandard → S-100 bus ⓘ
Control Program for Microcomputers → usedOn → S-100 bus ⓘ
this entity surface form: S-100 bus systems
S-100 bus computers → usesBusStandard → S-100 bus ⓘ