The “Pizza Box” Macintosh LC is a distant cousin of the Macintosh II in a smaller case and lacks many of the expansion options. It shipped with system 6 as it’s operating system. Like the Apple Mac IIsi, announced at the same time, the LC was shipped with colour capable video output built in. However, unlike it’s predecessors, the computer was available at low cost.
Low Cost Computing:
The label “LC” reportedly stands for low cost colour. Although an attempt by Apple to make low cost- affordable Macs, the computer was designed to reduce overheads and cut some corners on performance, such as using the 68020 processor, which had already been deployed and replaced by the 68030 in current high end models. Slower than the Mac II, released some 3 years earlier, the key difference was the 16 bit data path, half that of the Mac II. Memory was limited in the LC to all of 10 MB, leaving this mac lagging behind the higher end units released by Apple. However, the computer sold well, with 500,000 units being snapped up during the first 12 months of sale.
The Apple Macintosh LC features a 16 MHz 32 bit Motorola 68020 processor on a 16 bit Bus.
The 68020 processor was developed by Motorola and offered 32 bit addressing with a 256 byte cache onboard. It could interact with coprocessors including a floating point unit (MC68881 or MC68882 FPU) and the paged memory management unit (MC68851 PMMU).
Video & Graphics
The Macintosh LC has a single video memory slot that supports a 100 ns VRAM SIMM. The factory fitted 256k module can be replaced with a 512k one. The Computer supports 512×384 at 8 bit or 640×480 with 4-bit color when fitted with 256k of VRAM,. Upgraded to 512k of VRAM, the LC can support 512×384 at 16-bit color and 640×480 at 8-bit color. The Macintosh LC only supports a single display, but a second one can be supported with the addition of an LC PDS video card.
The Macintosh LC accepts 100ns 30 pin SIMMS. A total of 10MB ram can be added via 2 x 4MB SIMMS. A total of 2MB is pre-installed (soldered) to the motherboard.
Ports & connectivity:
Ports include a DB-15 video port, DB-25 SCSI port, Apple Desktop Bus (ADB), 2 x serial ports (Modem & Printer), Mono (8 bit) sound out and a sound in analogue (3.5mm jack) that would only accept the plaintalk microphone.
Apple shipped three different versions of the Macintosh LC, each with subtle changes to the specification:
- M0442LL/A was configured with a 40 MB hard drive and 2 MB of RAM.
- M1218LL/A was configured with a 40 MB hard drive and 4 MB of RAM.
- M1201LL/A was configured with an 80 MB hard drive and 4 MB of RAM.
The Macintosh LC shipped with Macintosh System 6. It could be upgraded to System 7.5.5. with a memory upgrade beyond 4 MB.
||October 15, 1990
||March 23, 1992
|System Bus Speed:
||Cache Bus Speed:
||Min. RAM Speed:
||2 MB, 4 MB
|Standard Hard Drive:
||40 MB, 80 MB
||Int. HD Interface:
||1.44 MB* (Auto)
||1 LC PDS
||By default, both the floppy disk and 3.5″ hard drive bays are occupied.
|Apple Order No:
|Apple Model No:
|Original Mac OS:
||Supported Mac OS: