TITLE
Macintosh Computers: ROM Version Numbers
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Article ID:
Created:
Modified:
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2532
2/13/88
10/7/99
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TOPIC
DISCUSSION
To find the ROM revision of a computer not listed in this article, use one of the following two described methods.
Apple System Profiler is the easiest. Launch the program and under the System Profile tab, look in the Production information section for the ROM revision.
Alternatively, you can use the Programmer's Interrupt Switch to determine the ROM version number of your Macintosh Computer.
1. Press the programmer's interrupt switch, or use the keyboard equivalent.
2. Type: DM 2AE
3. Press return.
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This displays the ROMbase global which is located at memory address $0002AE. The ROMbase global is the number located in offset 0 and 2. For example, a Quadra 660AV displays: 4080 0000 XXXX XXXX XXXX XXXX XXXX XXXX
4. Type the ROMbase global. EXAMPLE: DM 40800000. The result is 5BF1 0FD1 0000 002A 077D XXXX XXXX XXXX
5. The machine type and ROM version are at offset 8 or 077D in this case which is from a 660av Macintosh Computer. You could also add the 8 bytes to the memory address and have done DM 40800008 and the first two bytes would be the type and ID.
Macintosh ROM Version Table
System
Machine Type
ROM version
Macintosh 128K 00
Macintosh 512K 00
Macintosh 512Ke 00 75
Macintosh Plus 00 75
Macintosh SE 02 76
Macintosh SE/30 01 78
Macintosh Classic 02 76
Macintosh Classic II 06 7C
Macintosh Color Classic 06 7C
Macintosh LC 06 7C
Macintosh LC II 06 7C
Macintosh LC III 06 7C
Macintosh LC 520 06 7C
Macintosh LC 550 06 7C
Macintosh LC 575 06 7C
Macintosh LC 475 06 7C
Macintosh LC 580 06 7C
Macintosh LC 630 06 7C
Macintosh TV 06 7C
Performa 200 06 7C
Performa 400, 405, 410, 430 06 7C
Performa 460, 466, 467 06 7C
Performa 475, 476 06 7C
Performa 550, 560 06 7C
Performa 575, 578, 580 06 7C
Performa 600, 600CD 06 7C
Performa 630, 631, 635, 636, 637, 638 06 7C
Performa 5200, 5215 07 7D
Performa 5260, 5300, 5320 07 7D
Performa 6110,6112,6115,6116,6117,6118 07 7D
Performa 6200,6205,6214,6216,6218,6220 07 7D
Performa 6230, 6290, 6300, 6310, 6320 07 7D
Performa 6360 07 7D
Performa 6400 07 7D
Macintosh II 01 78
Macintosh IIx 01 78
Macintosh IIcx 01 78
Macintosh IIci 06 7C
Macintosh IIsi 06 7C
Macintosh IIfx 06 7C
Macintosh Centris 610 06 7C
Macintosh Centris 650 06 7C
Macintosh Centris 660AV 07 7D
Macintosh Quadra 605 06 7C
Macintosh Quadra 610 06 7C
Macintosh Quadra 630 06 7C
Macintosh Quadra 650 06 7C
Macintosh Quadra 660AV 07 7D
Macintosh Quadra 700 06 7C
Macintosh Quadra 800 06 7C
Macintosh Quadra 840AV 07 7D
Macintosh Quadra 900 06 7C
Macintosh Quadra 950 06 7C
Macintosh Portable 03 78
PowerBook 100 03 7A
PowerBook 140 06 7C
PowerBook 145 06 7C
PowerBook 145B 06 7C
PowerBook 150 06 7C
PowerBook 160 06 7C
PowerBook 165 06 7C
PowerBook 165c 06 7C
PowerBook 170 06 7C
PowerBook 180 06 7C
PowerBook 180c 06 7C
PowerBook 190 07 7D
PowerBook Duo 210 06 7C
PowerBook Duo 230 06 7C
PowerBook Duo 250 06 7C
PowerBook Duo 270c 06 7C
PowerBook Duo 280 06 7C
PowerBook Duo 280c 06 7C
PowerBook Duo 2300 07 7D
PowerBook 520 06 7C
PowerBook 520c 06 7C
PowerBook 540 06 7C
PowerBook 540c 06 7C
PowerBook 5300 07 7D
Power Macintosh 4400/200 07 7D
Power Macintosh 5200/75 LC 07 7D
Power Macintosh 5300/100 LC 07 7D
Power Macintosh 5260/100 07 7D
Power Macintosh 5400/120 07 7D
Power Macintosh 5500/225 07 7D
Power Macintosh 6100 Series 07 7D
Power Macintosh 6500/225 & 6500/250 07 7D
Power Macintosh 7100 Series 07 7D
Power Macintosh 7200 Series 07 7D
Power Macintosh 7300 Series 07 7D
Power Macintosh 7500 Series 07 7D
Power Macintosh 7600 Series 07 7D
Power Macintosh 8100 Series 07 7D
Power Macintosh 8500 Series 07 7D
Power Macintosh 8600 Series 07 7D
Power Macintosh 9500 Series 07 7D
Power Macintosh 9600 Series 07 7D
NOTES:
1. The ROM version does not necessarily reflect slight differences in ROM sets. For example, the Macintosh IIfx ROMs are slightly different from the Macintosh IIci ROMs, even though the ROM version number is the same.
2. With the Centris 660AV and Quadra 840AV, a new 2 MB ROM was introduced.
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