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Macintosh IIfx

M5525 · 1990–1992 · desktop

Specifications

Cpu: Motorola 68030 40 MHz + 68882 FPU 40 MHz, 32 KB L2 cache, plus two 10 MHz 6502-based I/O coprocessors
Gpu: None onboard; NuBus video cards required (Apple cards drove 512×384 and 640×480 class displays)
Ram: max: 128 MB (proprietary 64-pin dual-ported SIMMs, 80 ns, in groups of four across 8 slots) · base: 4 MB
Ports: NuBus slots ×6 · IIfx PDS slot · ADB ×2 · SCSI (DB-25, needs the special black IIfx terminator) · Serial ×2 (printer, modem) · Audio out
Display: None built in and no onboard video; requires a NuBus video card
Storage: base: 80 MB SCSI HDD · options: 160 MB SCSI HDD · Floppy-only configuration · 1.44 MB SuperDrive floppy, bay for a second floppy
Os Support: latest: Mac OS 7.6.1 · shipped: System 6.0.5
Release Price: $9,900

Variants

Storage

Floppy onlyM5510LL/A

80MB HDDM5515LL/A

160MB HDDM5520LL/A

Upgrade paths

RAM

128 MB, but only with the IIfx's unique 64-pin SIMMs · The proprietary dual-ported SIMMs are incompatible with standard 30-pin sticks and are scarce and expensive today.

HARD

CPU

68040 accelerators (Radius Rocket, Applied Engineering) and 68030 clock accelerators to ~50 MHz · Period NuBus/PDS accelerators documented by the 68k community; pricing and availability vary.

MODERATE

storage

Internal SCSI drives or solid-state emulators · Remember the black IIfx SCSI terminator when reworking the chain.

EASY