For programmers, the fourth Inside Macintosh volume details how to use HFS and the rest of the Mac Plus's new system software.
#1988 mac plus software
The Mac Plus has 128 KB of ROM on the motherboard, which is double the amount of ROM in previous Macs the ROMs included software to support SCSI, the then-new 800 KB floppy drive, and the Hierarchical File System (HFS), which uses a true directory structure on disks (as opposed to the earlier MFS, Macintosh File System in which all files were stored in a single directory, with one level of pseudo-folders overlaid on them). However, with the increased disk storage capacity combined with 2-4x the available RAM, the external drive was less of a necessity than it had been with the 128K and 512K. Like the 400 KB drive before it, a companion Macintosh 800K External Drive was an available option. The 800 KB drive has two read/write heads, enabling it to simultaneously use both sides of the floppy disk and thereby double storage capacity.
#1988 mac plus Pc
The drive was still completely incompatible with PC drives. The drive is controlled by the same IWM chip as in previous models, implementing variable speed GCR. It has what was then a new 3 + 1⁄ 2-inch double-sided 800 KB floppy drive, offering double the capacity of floppy disks from previous Macs, along with backward compatibility. (Although 30-pin SIMMs could support up to 16 MB total RAM, the Mac Plus motherboard had only 22 address lines connected, for a 4 MB maximum.) By replacing them with 1MB SIMMs, it was possible to have 4 MB of RAM. Four SIMM slots were provided and the computer shipped with four 256K SIMMs, for 1MB total RAM.
The Mac Plus was the first Apple computer to utilize user-upgradable SIMM memory modules instead of single DIP DRAM chips. The Macintosh Plus was the last classic Mac to have a phone cord-like port on the front of the unit for the keyboard, as well as the DE-9 connector for the mouse models released after the Macintosh Plus would use ADB ports. SCSI ports remained standard equipment for all Macs until the introduction of the iMac in 1998. The SCSI implementation of the Plus was engineered shortly before the initial SCSI spec was finalized and, as such, is not 100% SCSI-compliant.
#1988 mac plus zip
Introduced as the Macintosh Plus, it was the first Macintosh model to include a SCSI port, which launched the popularity of external SCSI devices for Macs, including hard disks, tape drives, CD-ROM drives, printers, Zip Drives, and even monitors. and a double-sided (800K bytes) disk drive, all in the standard Mac box". It is the earliest Macintosh model able to run System Software 5, System 6, and System 7.īruce Webster of BYTE reported a rumor in December 1985: "Supposedly, Apple will be releasing a Big Mac by the time this column sees print: said Mac will reportedly come with 1 megabyte of RAM. Originally, the computer's case was the same beige color as the original Macintosh, Pantone 453 however, in 1987, the case color was changed to the long-lived, warm gray "Platinum" color. As an evolutionary improvement over the 512K, it shipped with 1 MB of RAM standard, expandable to 4 MB, and an external SCSI peripheral bus, among smaller improvements. The Macintosh Plus computer is the third model in the Macintosh line, introduced on January 16, 1986, two years after the original Macintosh and a little more than a year after the Macintosh 512K, with a price tag of US$2,599. Macintosh Plus at the Museo Nacional de Ciencia y Tecnología in Spainġ MB RAM, expandable to 4 MB (150 ns 30-pin SIMM)
0 kommentar(er)
