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Home computer

Amstrad CPC 464

A Z80A home computer sold as a complete set, with Locomotive BASIC in ROM, a cassette deck built into the keyboard and its own monitor.

Manufacturer
Amstrad
Released
June 1984
Region
United Kingdom
Record status
provisional
A dark gray Amstrad CPC 464 with a cassette deck built into the right of its keyboard, connected to an Amstrad color monitor showing a high-score table.

An Amstrad CPC 464 with the CTM 640 color monitor it was sold with — the monitor also supplied the computer's power. The screen is showing Arkanoid.

Frédéric Bisson · CC BY 2.0 · Wikimedia Commons

About this machine

Amstrad sold the CPC as one box at a time when rivals expected the buyer to supply a television and a tape recorder. The monitor carried the power supply for the whole machine, so the two parts were not separable.

Configuration

PAL retail machine

Europe

Component Role Count Clock Capacity
Zilog Z80A Main CPU 1 4 MHz Nominal clock —
Amstrad CPC gate array GPU 1 unknown Nominal clock —
Amstrad CPC 464 RAM System memory 1 — 64 KiB shared
Amstrad CPC 464 ROM Read-only firmware and BASIC ROM. System memory 1 — unknown shared

Figures for the whole machine

Amstrad CPC 464: system figures

provisional A figure marked provisional is recorded but not accepted: its evidence is unsettled. It may rely on one source, an unconfirmed announcement, or a digit read from a damaged scan. The reason appears under the figure. The catalog shows the figure but never uses it in a multiplier. How records are judged.

Metric Value Evidence Basis Method Source
Clock frequency cpu provisional 4 MHz Confirmed Vendor-rated Nominal clock Stated by the vendor The Amstrad technical specification lists the Z80A clock.
5 documented absences
Amstrad CPC 464: system figures: documented absences
Metric Value Evidence Basis Method Source
Clock frequency gpu provisional unknown No accepted graphics-clock figure was located in the user guide. Not stated Vendor-rated Nominal clock Stated by the vendor The user guide provides no page-level graphics-clock figure suitable for this record.
Memory bandwidth memory provisional unknown No accepted memory transfer-rate figure was located in the user guide. Not stated Vendor-rated Theoretical peak Stated by the vendor The user guide provides no memory transfer-rate figure from which bandwidth can be stated.
Sustained FP40 rate whole-system provisional unknown A Locomotive BASIC result needs a named reproducible benchmark before it can be stated. Not stated Measured Benchmark run Published independently
Memory capacity whole-system provisional unknown No whole-system total can be derived without a verified RAM figure. Not stated Vendor-rated Design capacity Stated by the vendor No whole-system memory total can be supported while the verified source provides no RAM figure.
Rated power consumption whole-system provisional unknown No accepted whole-system power rating was located in the user guide. Not stated Vendor-rated Rated power Stated by the vendor The user guide provides no whole-system power rating.

Figures for its components

1 documented absence
Zilog Z80A: documented absences
Metric Value Evidence Basis Method Source
Peak FP32 rate cpu provisional not applicable The Z80A contains no floating-point hardware. Not stated Vendor-rated Theoretical peak Stated by the vendor Provisional record for amstrad-cpc464-z80a:peak-fp32-rate: the cited primary manual is registered, but its page-level transcription and independent review are still pending.
Amstrad CPC 464 RAM

provisional A figure marked provisional is recorded but not accepted: its evidence is unsettled. It may rely on one source, an unconfirmed announcement, or a digit read from a damaged scan. The reason appears under the figure. The catalog shows the figure but never uses it in a multiplier. How records are judged.

Metric Value Evidence Basis Method Source
Memory capacity memory provisional 64 KiB Confirmed Vendor-rated Design capacity Stated by the vendor The Amstrad technical specification lists the fitted RAM capacity.
1 documented absence
Amstrad CPC 464 ROM: documented absences
Metric Value Evidence Basis Method Source
Memory capacity memory provisional unknown No page-level ROM figure has been verified in the cited guide. Not stated Vendor-rated Design capacity Stated by the vendor The verified user-guide record does not expose a page-level ROM quotation.

Sources