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K Service Source Centris 660AV/Quadra 660AV K Service Source Basics Centris 660AV/Quadra 660AV Basics Overview - 2 Overview This manual includes complete repair procedures for the Centris 660AV and Quadra 660AV shown at left. Figure: Centris 660AV and Quadra 660AV K Service Source Specifications Centris 660AV/Quadra 660AV Specifications Processors - 1 Processors Processor Motorola 68040 25 MHz Built-in paged memory management unit (PMMU), floating point unit (FPU), and 8K memory cache Addressing 32-bit registers 32-bit address/data bus Direct Memory A Peripheral Subsystem Controller (PSC) provides direct Access (DMA) memory access (DMA) between the 68040 buses and peripheral devices Specifications Processors - 2 Digital Signal AT&T DSP3210 32-bit floating-point digital signal processor Processor (DSP) Supports real-time tasks such as speech recognition, audio compression, and analog modem signal processing. Specifications Memory - 3 Memory RAM 8 MB (4 MB soldered DRAM plus 4 MB SIMM) standard, expandable to 68 MB 72-pin SIMMs 70 ns access time ROM 1 MB soldered on logic board PRAM 256 bytes of parameter memory Specifications Memory - 4 VRAM 1 MB (two banks of 512K VRAM soldered on board) Clock/Calendar Maximum pixel depths for graphics: Calendar