[ EARLY 8-BIT AND 16-BIT PROCESSORS // IDENTIFIED CPU ]
Intel 8085A
Intel 8085 NMOS model introduced 1976. 8-bit CPU, 16-bit address, 3 MHz, 40-pin DIP, single +5 V supply, integrated clock and serial I/O.
MODEL IDENTIFICATION: Intel 8085A. Match full model suffix, stepping and package to the physical item and cited documentation.
Recorded specifications
| Cataloged model | Intel 8085A |
|---|---|
| Era / family | Intel 8085 NMOS model introduced 1976. |
| Model specifications | 8-bit CPU, 16-bit address, 3 MHz, 40-pin DIP, single +5 V supply, integrated clock and serial I/O. |
| Compatibility | 8085 bus/timing; not 8080A pin-compatible. |
| Variants / limits | 8085AH is later HMOS; check suffix/electrical limits. |
Compatibility and variants
- 8085 bus/timing; not 8080A pin-compatible.
- 8085AH is later HMOS; check suffix/electrical limits.
- Check system-vendor CPU support, board revision, firmware minimum, package, memory, cooling and power before installation; similar socket naming does not prove compatibility.
Service and archival notes
Record package, marking, clock and peripheral wiring.
Archive the complete marking/OPN/sSpec, stepping, physical condition, tested host revision, firmware, memory population, cooling, and test conditions. Distinguish published limits from measurements.
Sources & further reading
- Intel ARK model lookup — Intel 8085AOfficial Intel model specification search for the cataloged product.
- Intel technical archive — Intel 8085A product familyArchived Intel-authored processor data sheets/manuals; match model and revision.
- Intel processor-history reference — Intel 8085AHistorical context for Intel processor generations; use the exact data sheet for limits.
- Various Creators — I built the GlitchW0rks 8085 SBC Rev4 Mini | RetroComputing Fun!Independent video review; treat as supplementary context, not primary manufacturer documentation.
Use the matching manufacturer data sheet revision and platform vendor’s CPU list for final fit decisions.