Macintosh 512K
 | |
| Specifications | |
|---|---|
| Manufacturer | Apple Computer, Inc. |
| Type | Personal Computer |
| Released | September 10, 1984 |
| Discontinued | April 14, 1986 |
| Intro price | US$3,195 |
| CPU | Motorola 68000 @ 7.83 MHz |
| Memory | 512 KB RAM (not expandable) |
| Storage | 400 KB 3.5" floppy drive |
| Display | 9" monochrome CRT (512×342 pixels) |
| Sound | Monaural 8-bit, 22 kHz (4-voice) |
| Dimensions | 13.6" H × 9.6" W × 10.9" D |
| Weight | 16.5 lbs (7.5 kg) |
| OS / Firmware | System 1.0 – System 4.1 |
| Predecessor | Macintosh 128K |
| Successor | Macintosh Plus |
| Codename | Engine, Hero |
| Model no. | M0001W |
Historical Background
The Macintosh 512K, released on September 10, 1984, was an improved version of the Macintosh 128K. It featured four times the RAM (512 KB), allowing for improved multitasking and compatibility with a wider range of software. It retained the same Motorola 68000 processor running at 7.83 MHz and the 9-inch monochrome display with a 400 KB floppy disk drive.
Due to its increased memory, the Macintosh 512K could run more advanced applications, including MacDraw, MacProject, and Microsoft Multiplan. However, it still lacked built-in support for an internal hard drive, relying on external floppy drives for additional storage. The 512K model was succeeded by the Macintosh Plus, which introduced expandable RAM and an external SCSI port.
Maintenance
Due to the 512K's similarities with the 128K, there is no difference in it's maintenance, PCB or Schmatics, please see the Macintosh 128K page for maintenance, guides and more information.