Macintosh IIx

The Macintosh IIx is a personal computer designed, manufactured, and sold by Apple Computer from September 1988 to October 1990. This model was introduced as an update to the original Macintosh II, replacing the 16 MHz Motorola 68020 CPU and 68881 FPU with a 68030 CPU and 68882 FPU running at the same clock speed.[1] The initial price of the IIx was US$7,769 (equivalent to $19,224 in 2022) or US$9,369 (equivalent to $23,183 in 2022) for the version with a 40 MB hard drive.[2]

Macintosh IIx
A Macintosh IIx
DeveloperApple Computer
Product familyMacintosh II
Release dateSeptember 19, 1988 (1988-09-19)
Introductory priceUS$7,769 (equivalent to $19,224 in 2022)
DiscontinuedOctober 15, 1990 (1990-10-15)
Operating systemSystem 6.0.1-System 7.5.5
CPUMotorola 68030 @ 16 MHz
Memory1 MB or 4 MB, expandable to 128 MB (120 ns 30-pin SIMM)
DimensionsHeight: 5.5 inches (14 cm)
Width: 18.7 inches (47 cm)
Depth: 14.4 inches (37 cm)
Mass24 pounds (11 kg)
PredecessorMacintosh II
SuccessorMacintosh IIfx
RelatedMacintosh SE
Macintosh SE/30
Macintosh IIci
Macintosh IIcx

The 800 KB floppy drive was replaced with a 1.44 MB SuperDrive; the IIx is the first Macintosh to include this as standard.[3]

The Mac IIx included 0.25 KiB of L1 instruction CPU cache, 0.25 KiB of L1 data cache, a 16 MHz bus (1:1 with CPU speed), and supported up to System 7.5.5.

The IIx was the second of three Macintosh models to use this case allowing dual floppy drives and 6 NuBus slots; the last model was the Macintosh IIfx. Apple's nomenclature of the time used the "x" to indicate the presence of the 68030 CPU as used in the Macintosh IIcx and IIvx.

Support and spare parts for the IIx were discontinued on August 31, 1998.

Timeline
Timeline of Macintosh II family models
Macintosh QuadraMacintosh LCMacintosh SE/30Macintosh SEMacintosh PlusMacintosh IIvxMacintosh IIviMacintosh IIsiMacintosh IIfxMacintosh IIciMacintosh IIcxMacintosh IIxMacintosh II

References
  1. Garrison, Ann (December 1988). "68030 at Last". Macworld. Vol. 5, no. 12. p. 83.
  2. Cook, John; Cochrane, Carol (September 19, 1988). "Apple Announces 68030 Macintosh IIx With High Density Compatible Drive". Business Wire.
  3. Pogue, David; Schorr, Joseph (1999). MacWorld Mac Secrets, 5th Edition. IDG Books. p. 467. ISBN 0-7645-4040-8.
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