Macintosh Hardware Compatibility - ZuluSCSI/ZuluSCSI-firmware GitHub Wiki
ZuluSCSI is compatible with all Macintosh computers that have a SCSI interface, all the way from the Macintosh Plus, up through the beige PowerMac G3's, which were the last Apple machines to ship with an on-board SCSI controller. With nearly all Macintosh systems, the maximum throughput that the on-board SCSI controller can support is significantly less than what ZuluSCSI can provide, throughput-wise, making the system itself the bottleneck, not the ZuluSCSI.
In order to use ZuluSCSI on a Macintosh Plus, you should set the following in your zuluscsi.ini file:
[SCSI]
System=MacPlus
On all other Macintosh computers, you should set the following in your zuluscsi.ini file:
[SCSI]
System=Mac
The following historical Technical Advisory from Apple explains the throughput capabilities of the SCSI controller in each Macintosh computer that supports SCSI: https://web.archive.org/web/20230126014951/https://support.apple.com/kb/TA29470?locale=en_US
It's reproduced here for completeness:
--------------- --------- --------- -----
Macintosh 128K none 0
Macintosh 512K none 0
Macintosh 512Ke none 0
Mac Plus NCR 53C80 1.25 MB/sec
Macintosh SE NCR 53C80 1.25 MB/sec
Macintosh SE/30 NCR 53C80 1.25 MB/sec
Macintosh Classic NCR 53C80 1.25 MB/sec
Macintosh Classic II NCR AM85C80 1.25 MB/sec
Macintosh Color Classic NCR AM85C80 1.25 MB/sec
Macintosh LC NCR AM85C80 1.5 MB/sec
Macintosh LC II NCR AM85C80 1.5 MB/sec
Macintosh LC III NCR AM85C80 1.5 MB/sec
Macintosh LC 475 NCR 53C96 5 MB/sec (1),(2)
Macintosh LC 520 NCR AM85C80 1.5 MB/sec
Macintosh TV NCR AM85C80 1.5 MB/sec
Macintosh II NCR 53C80 1.25 MB/sec
Macintosh IIx NCR 53C80 1.25 MB/sec
Macintosh IIcx NCR 53C80 1.25 MB/sec
Macintosh IIci NCR 53C80 1.25 MB/sec
Macintosh IIfx Apple SCSI DMA 3 MB/sec
Macintosh IIsi NCR AM85C80 1.25 MB/sec
Macintosh IIvi NCR AM85C80 1.5 MB/sec
Macintosh IIvx NCR AM85C80 1.5 MB/sec
Macintosh Centris 610 NCR 53C96 5 MB/sec (1),(2)
Macintosh Centris 650 NCR 53C96 5 MB/sec (1),(2)
Macintosh Quadra 605 NCR 53C96 5 MB/sec (1),(2)
Macintosh Quadra 610 NCR 53C96 5 MB/sec (1),(2)
Macintosh 630 Family Custom IC (5)
Macintosh Quadra 650 NCR 53C96 5 MB/sec (1) (2)
Macintosh Quadra 660AV NCR 53C96 5 MB/sec (1),(2)
Macintosh Quadra 700 NCR 53C96 5 MB/sec (1)
Macintosh Quadra 800 NCR 53C96 5 MB/sec (1),(2)
Macintosh Quadra 840AV NCR 53C96 5 MB/sec (1),(2)
Macintosh Quadra 900 NCR 53C96 5 MB/sec (1),(2),(3)
Macintosh Quadra 950 NCR 53C96 5 MB/sec (1),(2),(3)
Power Macintosh 5200
5300
5400
5500
Power Macintosh 6100 Custom IC 5 MB/sec (2)
Power Macintosh 6200
6300
6400
6500
Power Macintosh 7100 Custom IC 5 MB/sec (2)
Power Macintosh 7200 Custom IC 5 MB/sec
Power Macintosh 7500 (2),(6)
Internal/external Custom IC 5 MB/sec
Fast SCSI (internal) MESH Custom IC 10 MB/sec
Power Macintosh 7600 (2),(6)
Internal/external Custom IC 5 MB/sec
Fast SCSI (internal) MESH Custom IC 10 MB/sec
Power Macintosh 8100 Custom IC 5 MB/sec (2)
Power Macintosh 8500 (2),(6)
Internal/external Custom IC 5 MB/sec
Fast SCSI (internal) MESH Custom IC 10 MB/sec
Power Macintosh 9500 (2),(6)
Internal/external Custom IC 5 MB/sec
Fast SCSI (internal) Custom IC 10 MB/sec
Power Macintosh G3 Custom IC
Macintosh Portable NCR 53C80 1.25 MB/sec
Macintosh PowerBook 100 NCR AM85C80 1.5MB/sec
Macintosh PowerBook 140 NCR AM85C80 1.5MB/sec
Macintosh PowerBook 145 NCR AM85C80 1.5MB/sec
Macintosh PowerBook 145B NCR AM85C80 1.5MB/sec
Macintosh PowerBook 150 NCR AM85C80 1.5MB/sec (4)
Macintosh PowerBook 160 NCR AM85C80 1.5MB/sec
Macintosh PowerBook 165c NCR AM85C80 1.5MB/sec
Macintosh PowerBook 170 NCR AM85C80 1.5MB/sec
Macintosh PowerBook 180 NCR AM85C80 1.5MB/sec
Macintosh PowerBook 180c NCR AM85C80 1.5MB/sec
Macintosh PowerBook 190
Macintosh Duo 210 NCR AM85C80 1.5MB/sec
Macintosh Duo 230 NCR AM85C80 1.5MB/sec
Macintosh Duo 250 NCR AM85C80 1.5MB/sec
Macintosh Duo 270c NCR AM85C80 1.5MB/sec
Macintosh Duo 280c Custom IC 1.5MB/sec
Macintosh PowerBook 520 Custom IC 1.5MB/sec
Macintosh PowerBook 540 Custom IC 1.5MB/sec
PowerBook 1400 Custom IC
PowerBook 2400 Custom IC
PowerBook 3400 Custom IC
PowerBook 5300 Custom IC
PowerBook G3 Custom IC