Chips › Processors › Intel x86 family › NEC V20 / V30
NEC V20 / V30
1982
NEC's 1982 Intel 8088/8086-compatible CPUs, faster drop-in replacements that also offered an 8080 emulation mode.
Emulators
| Emulator | Type | License | Site |
|---|---|---|---|
| MartyPC | both | MIT | Website ↗ |
| Psion SIBO/EPOC16 Emulator | downloadable | Freeware | Website ↗ |
Reference & documentation
External technical references for programming NEC V20 / V30 and for writing emulators.
| Resource | Type | Notes |
|---|---|---|
| NEC uPD70108H/70116H Datasheet (IC-3552A) ↗ | Datasheet | Official electrical, pinout and timing specifications |
| NEC uPD70116 (V30) Datasheet PDF ↗ | Datasheet | Full V30 16-bit device datasheet |
| NEC V20/V30 Users Manual (Ceibo mirror) ↗ | Datasheet | Complete users manual PDF, mirror copy |
| SingleStepTests/v20 - opcode status metadata ↗ | Instruction set | Documents defined/undefined/alias opcode behavior and flag masks |
| The D6 instruction on NEC V-series - VCFed ↗ | Instruction set | Undocumented D6 opcode behaves as XLAT, detailed |
| NEC uPD70108H/70116H Datasheet (IC-3552A) ↗ | Pinout | Pin configurations for V20/V30 packages |
| NEC V20/V30 Users Manual (Oct 1986) ↗ | Programming | Full official manual: BRKEM/RETEM, 8080 mode, instructions |
| Exploring the NEC V20 CPU - MartyPC blog ↗ | Reference | Reverse-engineered undocumented opcodes, cycle timing, microcode |
| NEC V20 - Wikipedia ↗ | Reference | Architecture overview, ISA additions, variants, 8080 mode |
| NEC V20/V30 emulation - MartyPC discussion ↗ | Source | Emulator implementation notes for V20 native mode |
| SingleStepTests/v20 - Hardware-Generated CPU Test Suite ↗ | Test suite | Cycle-accurate JSON tests per opcode, hardware-generated |