Editing Macintosh Performa 5280

{{Infobox computer
| name         = Macintosh Performa 5280
| image        = [[File:Macintosh_Performa_5200.jpg]]
| caption      = Macintosh Performa 5280
| manufacturer = Apple Computer, Inc.
| type         = All-in-one Personal Computer
| release date = November 12, 1996
| discontinued = June 1, 1997
| cpu          = PowerPC 603e @ 120 MHz
| memory       = 8 MB or 16 MB RAM (expandable to 64 MB)
| storage      = 1.2 GB IDE hard drive, 8X CD-ROM
| display      = 14" Shadow Mask CRT (640×480 at 16-bit color)
| sound        = 16-bit mono sound input
| dimensions   = 17.5" H × 15.1" W × 16.0" D (44.5 × 38.4 × 40.6 cm)
| weight       = 45 lbs (20.4 kg)
| os           = System 7.5.3 – Mac OS 9.1
| predecessor  = [[Macintosh Performa 5260CD|Performa 5260CD]]
| successor    = [[Macintosh Performa 5400CD|Performa 5400CD]]
| model        = M5182J/A
}}
The '''Macintosh Performa 5280''' is an all-in-one personal computer manufactured by Apple Computer, Inc., introduced on November 12, 1996.<ref>{{cite web |url=https://everymac.com/systems/apple/mac_performa/specs/mac_performa_5280_120.html |title=Apple Macintosh Performa 5280/120 Specs |publisher=EveryMac.com |access-date=2026-02-10}}</ref> It is a faster variant of the [[Macintosh Performa 5260CD|Performa 5260CD]] with a 120 MHz PowerPC 603e processor and 8X CD-ROM drive, sold exclusively in Japan.

The Performa 5280 is identical to the Performa 5260/120, but shipped with a different software bundle. The educational version, the [[Power Macintosh 5260|Power Macintosh 5260/120]], was sold in North America.<ref>{{cite web |url=https://en.wikipedia.org/wiki/Power_Macintosh_5260 |title=Power Macintosh 5260 |publisher=Wikipedia |access-date=2026-02-10}}</ref>

== Differences from Performa 5260CD ==

The Performa 5280 differs from the base [[Macintosh Performa 5260CD|Performa 5260CD]] in the following ways:

* '''CPU Speed:''' 120 MHz (vs 100 MHz)
* '''CD-ROM:''' 8X (vs 4X)
* '''Market:''' Sold exclusively in Japan
* '''Model Number:''' M5182J/A
* '''Introduction:''' November 1996 (vs April 1996)

== Architecture and Processor ==

The Performa 5280 uses the PowerPC 603e processor running at 120 MHz with a 40 MHz system bus. The 603e is a 32-bit processor with a 64-bit data path and includes an integrated floating-point unit.

=== Cache Configuration ===
* '''L1 Cache:''' 32 KB (16 KB instruction + 16 KB data)
* '''L2 Cache:''' 256 KB (optional expansion slot)

== Memory and Storage ==

=== RAM Configuration ===
{| class="wikitable" style="width:70%; text-align:center;"
|-
! Specification !! Details
|-
| '''RAM Type''' || 72-pin SIMM
|-
| '''Minimum Speed''' || 80 ns
|-
| '''Standard RAM''' || 8 MB or 16 MB
|-
| '''Maximum RAM''' || 64 MB
|-
| '''RAM Slots''' || 2
|}

RAM cannot be interleaved on this system. 1 MB of system RAM is permanently dedicated to video function.

=== Storage Systems ===
* '''Hard Drive:''' 1.2 GB IDE internal drive
* '''Floppy Drive:''' 1.44 MB 3.5" manual-inject
* '''CD-ROM:''' 8X

== Display and Graphics ==

The Performa 5280 features a built-in 14" Shadow Mask RGB CRT display running at 640×480 resolution with 16-bit color. Video memory consists of 1 MB dedicated from system RAM and cannot be expanded.

== Input/Output and Expansion ==

=== Port Configuration ===
* '''ADB:''' 1 port for keyboard and mouse
* '''Serial:''' 2 ports (printer and modem)
* '''Audio In:''' 1 port (16-bit mono)
* '''Audio Out:''' 1 port (stereo)
* '''SCSI:''' 1 external DB-25 port

=== Expansion Slots ===
* '''LC PDS:''' 1 slot
* '''Comm Slot:''' 1 slot
* '''Video I/O Slot:''' 1 slot
* '''TV Tuner Slot:''' 1 slot

== General Maintenance ==

For detailed maintenance practices including cleaning, PRAM battery management, connector corrosion prevention, and voltage adjustments, refer to the dedicated [[Macintosh Performa 5260CD General Maintenance]] page.

== Capacitor Replacement Guide ==

Detailed capacitor replacement guidelines for the logic board can be found on the [[Macintosh Performa 5260CD Capacitor Replacement Guide]] page.

== Troubleshooting ==

A comprehensive troubleshooting guide addressing no power, chime but no video, intermittent operation, Sad Mac errors, and floppy drive problems is available on the [[Macintosh Performa 5260CD Troubleshooting]] page.

== Technical Details ==

<templatestyles src="Template:StyledTable/styles.css" />

=== System Architecture at a Glance ===
{| class="wikitable styled-table" style="width:90%; text-align:center;"
! Sub-system !! Specification (Performa 5280, November 1996)
|-
| '''CPU''' || PowerPC 603e @ 120 MHz
|-
| '''System Bus''' || 40 MHz
|-
| '''ROM''' || 4 MB
|-
| '''RAM''' || 8-64 MB (72-pin SIMM)
|-
| '''Video''' || 640 × 480 @ 16-bit color
|-
| '''VRAM''' || 1 MB (from system RAM)
|-
| '''Sound''' || 16-bit mono input, stereo output
|-
| '''Disks''' || 1.44 MB floppy, 1.2 GB HDD, 8X CD-ROM
|-
| '''Ports''' || ADB, SCSI, Serial × 2, Audio I/O
|}

== See Also ==

* [[Macintosh Performa 5260CD]] — Base model (100 MHz)
* [[Macintosh Performa 5270CD]] — 100 MHz variant (Asia/Europe)

== References ==
<references />

[[Category:Apple Vintage Computers]]