Macintosh IIvx: Difference between revisions

Line 43:

* '''FPU''': Motorola 68882 @ 32 MHz (included)

The 32 MHz CPU runs on a 16 MHz bus, which limits performance. The IIvx is slightly slower than the older [[Macintosh IIci]] in many benchmarks despite the higher clock speed.<ref>{{cite web |url=https://en.wikipedia.org/wiki/Macintosh_IIvx |title=Macintosh IIvx |publisher=Wikipedia |access-date=2026-02-09}}</ref> ~~The~~ serial ~~port~~ is ~~limited to~~ 57.6 kbit/s, ~~which can cause problems with MIDI hardware~~.

The 32 MHz CPU runs on a 16 MHz bus, which limits performance. The IIvx is slightly slower than the older [[Macintosh IIci]] in many benchmarks despite the higher clock speed.<ref>{{cite web |url=https://en.wikipedia.org/wiki/Macintosh_IIvx |title=Macintosh IIvx |publisher=Wikipedia |access-date=2026-02-09}}</ref> Apple's specification for the serial ports is '''230.4 Kbaud maximum''', or 0.92 Mbit/s with an external clock source<ref name="ssiivx" />. A 57.6 kbit/s limit was previously stated here and is not Apple's figure; the MIDI difficulty on these machines is a clocking problem rather than a ceiling on the port's rate, and no source for a specific number has been found.

The 32K L2 cache distinguishes the IIvx from the IIvi and Performa 600, which lack L2 cache.

Line 110:

=== Expansion Slots ===

* '''NuBus ~~Slots~~''': 3

* '''NuBus slots''': 3, plus what Apple calls an '''accelerator slot''' (not a general-purpose PDS)<ref name="ssiivx" />

* '''Processor Direct Slot (PDS)''': 1

* '''Expansion Bay''': 1 × 5.25" (for CD-ROM)

Line 116:

== Power ==

* '''~~Power Supply~~''': ~~230W~~ maximum

* '''Input ~~Voltage~~''': ~~100V – 240V~~ AC

=== Power — Apple's figures, and the trap in them ===

* '''~~Frequency~~'''~~: 50 – 60 Hz~~

* '''~~PRAM~~ Battery''': 3.6V lithium

Apple's Electrical specification for the IIvi, IIvx and Performa 600 is in '''three''' parts, and

they are easy to conflate:<ref name="ssiivx">Apple Computer, ''Macintosh IIvx, Macintosh IIvi, Performa 600 Service Source'' ([[Macintosh IIvx Service Source]], [[:File:Macintosh_iivx.vi.perf_600.pdf]]), Specifications chapter and Additional Procedures → Battery Verification ("if the battery voltage is below 2.8 volts, replace the battery").</ref>

* '''A/C line input: 100–120 VAC, 200 W'''

* '''A/C line output receptacle: 100–240 VAC, 3 A maximum''' — this is the '''switched monitor

outlet''' on the back, not the machine's own input

* '''DC power: 112 W maximum'''

'''"Input voltage 100–240 V AC" was previously given here. That is the output receptacle's

rating.''' Apple prints the machine's own line input as '''100–120 VAC''' — a domestic figure — so

a 220–240 V IIvx is a different supply, and its primary-side parts are not interchangeable with a

110 V one. Check which board is in front of you before ordering primary-side capacitors.

'''"230 W maximum" was also previously given here and is not Apple's figure''' for any part of this

machine: 200 W is the AC input rating and 112 W the DC output. 230 W is the '''Macintosh IIfx'''

figure.

'''Apple publishes no rail tolerance and no power-supply adjustment for this machine.'''

=== Battery ===

'''3.6 V ½AA lithium; Apple's instruction is to replace it below 2.8 V'''<ref name="ssiivx" /> — measured

on the 10 V DC range. 2.8 V is the IIcx / IIci / IIvi / IIvx / Quadra 700 / SE / SE-30 figure;

3.0 V and 3.2 V belong to other machines and get transplanted between them. Lithium leakage is

neutralised with '''bicarbonate of soda''', not vinegar.

== Case Design ==

Line 173:

Line 198:

| '''Storage''' || 40/80/230 MB SCSI HDD, 1.44 MB SuperDrive, optional 2X CD-ROM

|-

| '''Expansion''' || ~~3 ×~~ NuBus~~, 1 × PDS, 1 ×~~ 5.25" bay

| '''Expansion''' || Apple: '''three NuBus slots''' and '''one accelerator slot'''<ref name="ssiivx" />; plus a 5.25-inch bay

|-

| '''Ports''' || 2 × ADB, 2 × Serial (57.6 kbit/s), SCSI, Video, Audio I/O

@@ Line 43: / Line 43: @@
 * '''FPU''': Motorola 68882 @ 32 MHz (included)
-The 32 MHz CPU runs on a 16 MHz bus, which limits performance. The IIvx is slightly slower than the older [[Macintosh IIci]] in many benchmarks despite the higher clock speed.<ref>{{cite web |url=https://en.wikipedia.org/wiki/Macintosh_IIvx |title=Macintosh IIvx |publisher=Wikipedia |access-date=2026-02-09}}</ref> The serial port is limited to 57.6 kbit/s, which can cause problems with MIDI hardware.
+The 32 MHz CPU runs on a 16 MHz bus, which limits performance. The IIvx is slightly slower than the older [[Macintosh IIci]] in many benchmarks despite the higher clock speed.<ref>{{cite web |url=https://en.wikipedia.org/wiki/Macintosh_IIvx |title=Macintosh IIvx |publisher=Wikipedia |access-date=2026-02-09}}</ref> Apple's specification for the serial ports is '''230.4 Kbaud maximum''', or 0.92 Mbit/s with an external clock source<ref name="ssiivx" />. A 57.6 kbit/s limit was previously stated here and is not Apple's figure; the MIDI difficulty on these machines is a clocking problem rather than a ceiling on the port's rate, and no source for a specific number has been found.
 The 32K L2 cache distinguishes the IIvx from the IIvi and Performa 600, which lack L2 cache.
@@ Line 110: / Line 110: @@
 === Expansion Slots ===
-* '''NuBus Slots''': 3
+* '''NuBus slots''': 3, plus what Apple calls an '''accelerator slot''' (not a general-purpose PDS)<ref name="ssiivx" />
 * '''Processor Direct Slot (PDS)''': 1
 * '''Expansion Bay''': 1 × 5.25" (for CD-ROM)
@@ Line 116: / Line 116: @@
 == Power ==
-* '''Power Supply''': 230W maximum
-* '''Input Voltage''': 100V – 240V AC
+=== Power — Apple's figures, and the trap in them ===
-* '''Frequency''': 50 – 60 Hz
-* '''PRAM Battery''': 3.6V lithium
+Apple's Electrical specification for the IIvi, IIvx and Performa 600 is in '''three''' parts, and
+they are easy to conflate:<ref name="ssiivx">Apple Computer, ''Macintosh IIvx, Macintosh IIvi, Performa 600 Service Source'' ([[Macintosh IIvx Service Source]], [[:File:Macintosh_iivx.vi.perf_600.pdf]]), Specifications chapter and Additional Procedures → Battery Verification ("if the battery voltage is below 2.8 volts, replace the battery").</ref>
+* '''A/C line input: 100–120 VAC, 200 W'''
+* '''A/C line output receptacle: 100–240 VAC, 3 A maximum''' — this is the '''switched monitor
+  outlet''' on the back, not the machine's own input
+* '''DC power: 112 W maximum'''
+'''"Input voltage 100–240 V AC" was previously given here. That is the output receptacle's
+rating.''' Apple prints the machine's own line input as '''100–120 VAC''' — a domestic figure — so
+a 220–240 V IIvx is a different supply, and its primary-side parts are not interchangeable with a
+V one. Check which board is in front of you before ordering primary-side capacitors.
+'''"230 W maximum" was also previously given here and is not Apple's figure''' for any part of this
+machine: 200 W is the AC input rating and 112 W the DC output. 230 W is the '''Macintosh IIfx'''
+figure.
+'''Apple publishes no rail tolerance and no power-supply adjustment for this machine.'''
+=== Battery ===
+'''3.6 V ½AA lithium; Apple's instruction is to replace it below 2.8 V'''<ref name="ssiivx" /> — measured
+on the 10 V DC range. 2.8 V is the IIcx / IIci / IIvi / IIvx / Quadra 700 / SE / SE-30 figure;
+.0 V and 3.2 V belong to other machines and get transplanted between them. Lithium leakage is
+neutralised with '''bicarbonate of soda''', not vinegar.
 == Case Design ==
@@ Line 173: / Line 198: @@
 | '''Storage''' || 40/80/230 MB SCSI HDD, 1.44 MB SuperDrive, optional 2X CD-ROM
 |-
-| '''Expansion''' || 3 × NuBus, 1 × PDS, 1 × 5.25" bay
+| '''Expansion''' || Apple: '''three NuBus slots''' and '''one accelerator slot'''<ref name="ssiivx" />; plus a 5.25-inch bay
 |-
 | '''Ports''' || 2 × ADB, 2 × Serial (57.6 kbit/s), SCSI, Video, Audio I/O

Macintosh IIvx: Difference between revisions

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