Editing Macintosh Color Classic II (section)

== Design & Architecture ==
=== Processor & Performance ===
The Color Classic II’s heart was a Motorola 68030 microprocessor clocked at 33 MHz—a more than two-fold increase over the 16 MHz CPU in the original—paired with an optional 68882 FPU for floating-point acceleration. Its data bus was widened to 32 bits, doubling throughput compared to the 16-bit bus of the original Color Classic. These enhancements delivered roughly 2.5× the overall performance in CPU-bound tasks.

=== Memory Subsystem ===
* '''On-board RAM:''' 4 MB soldered DRAM (72 ns)  
* '''Expansion:''' One 72-pin SIMM slot supporting up to 32 MB more for a total of 36 MB
* '''ROM:''' 1 MB mask ROM containing System 7.1 startup and Toolbox routines  
* '''VRAM:''' 256 KB dual-ported video RAM, expandable to 512 KB via 72-pin VRAM SIMM enabling 32,768-color modes  

The 32-bit memory bus and cache controller in the LC 550 logic board provided significantly lower latency and higher bandwidth than the original’s MEMCjr chipset.

=== Storage & I/O ===
* '''Floppy Drive:''' 1.44 MB Apple “SuperDrive” (SWIM-II) supporting high-density disks.  
* '''Hard Drive:''' Internal 80 MB or 160 MB SCSI drives on shock-mounted brackets.  
* '''External I/O:'''  
** 1× DB-25 SCSI for external devices  
** 2× Mini-DIN-8 serial (printer/modem)  
** 2× ADB for keyboard/mouse  
** Audio in/out jacks for mono microphone and stereo line-out  
* '''Expansion:''' LC-type PDS slot for third-party cards (Apple IIe Card compatibility) and VRAM SIMM slot.

=== Video & Audio ===
The built-in 10″ Sony Trinitron CRT displayed up to 256 colors at 512×384 pixels by default, with a high-resolution 560×384 mode for Apple IIe emulation. The video DACs supported double-buffering via the VRAM SIMM. Audio comprised a mono internal speaker plus stereo line-level outputs, driven by an onboard DAC.