Home computer
Apple II
A 1.023 MHz 6502 home computer with configuration-dependent motherboard RAM and ROM-resident Integer BASIC.
- Manufacturer
- Apple Computer
- Released
- June 1977
- Region
- United States
- Record status
- approved
An Apple II in the Computer History Museum. The case holds the keyboard and the motherboard together; a monitor and a disk drive were bought separately.
About this machine
The January 1978 manual leaves the fitted RAM amount to the purchased configuration, so this record does not select a capacity. Its 8 KiB monitor and Integer BASIC ROM is named separately and is not writable memory.
Configuration
Configuration with unspecified RAM
| Component | Role | Count | Clock | Capacity |
|---|---|---|---|---|
| MOS Technology 6502 | Main CPU | 1 | 1.023 MHz Nominal clock | — |
| Apple II video generator | GPU | 1 | unknown Nominal clock | — |
| Apple II system RAM | System memory | 1 | — | unknown shared |
| Apple II firmware ROM Read-only monitor and Integer BASIC; not included in writable memory. | System memory | 1 | — | 8 KiB shared |
Figures for the whole machine
| Metric | Value | Evidence | Basis | Method | Source |
|---|---|---|---|---|---|
| Clock frequency cpu | 1.023 MHz | Confirmed | Vendor-rated | Nominal clock Stated by the vendor |
5 documented absences
| Metric | Value | Evidence | Basis | Method | Source |
|---|---|---|---|---|---|
| Clock frequency gpu | unknown The reference manual describes several display timing signals but does not state one frequency for a graphics processor. | Not stated | Vendor-rated | Nominal clock Stated by the vendor | |
| Memory bandwidth memory | unknown The reference manual specifies memory organization, not a transfer-rate figure. | Not stated | Vendor-rated | Theoretical peak Stated by the vendor | |
| Sustained FP40 rate whole-system | unknown The ROM format is outside FP32 and FP64; no named, reproducible benchmark run has yet been admitted. | Not stated | Measured | Benchmark run Published independently | |
| Memory capacity whole-system | unknown The January 1978 manual leaves fitted RAM dependent on the purchased configuration, so it does not support one whole-system writable-memory capacity. | Not stated | Vendor-rated | Design capacity Stated by the vendor | |
| Rated power consumption whole-system | unknown The manual gives power-supply limits and a minimum-load condition, not a comparable whole-system consumption rating. | Not stated | Vendor-rated | Rated power Stated by the vendor |
Figures for its components
1 documented absence
| Metric | Value | Evidence | Basis | Method | Source |
|---|---|---|---|---|---|
| Peak FP32 rate cpu | unknown The manual documents software floating point but does not explicitly state whether the Apple II configuration has floating-point hardware. | Not stated | Vendor-rated | Theoretical peak Stated by the vendor |
1 documented absence
| Metric | Value | Evidence | Basis | Method | Source |
|---|---|---|---|---|---|
| Memory capacity memory | unknown The January 1978 manual leaves fitted RAM dependent on the purchased configuration and does not state one universal capacity. | Not stated | Vendor-rated | Design capacity Stated by the vendor |
| Metric | Value | Evidence | Basis | Method | Source |
|---|---|---|---|---|---|
| Memory capacity memory | 8 KiB | Confirmed | Vendor-rated | Design capacity Stated by the vendor |