Editing Macintosh Centris 610 (section)

== Architecture and Processor ==

The Centris 610 uses a Motorola 68LC040 processor running at 20 MHz. The "LC" designation indicates the processor lacks an integrated floating-point unit (FPU). The 68LC040 can be replaced with a full 68040 to add FPU capability.<ref>{{cite web |url=https://lowendmac.com/1993/centris-610/ |title=Centris 610 |publisher=Low End Mac |access-date=2026-02-10}}</ref>

* '''CPU:''' Motorola 68LC040 @ 20 MHz
* '''Data bus:''' 32-bit
* '''Address bus:''' 32-bit
* '''L1 cache:''' 8 KB (integrated)
* '''ROM:''' 1 MB

=== Memory ===

* '''Onboard RAM:''' 4 MB soldered to logic board
* '''RAM slots:''' 2 × 72-pin SIMM
* '''Maximum RAM:''' 68 MB (4 MB onboard + 2 × 32 MB SIMMs)
* '''RAM speed:''' 80 ns or faster
* '''Supported SIMMs:''' 4, 8, 16, or 32 MB

If SIMMs of different speeds are used, the faster SIMM should be installed in bank 0 (frontmost slot).

=== Storage ===

* '''Floppy drive:''' 1.44 MB SuperDrive (auto-inject)
* '''Hard drive:''' 80, 230, or 500 MB internal SCSI
* '''CD-ROM:''' Optional 2× AppleCD 300i (internal)
* '''SCSI interface:''' External DB-25 connector