This might have been asked already but I have a 1.1.20.1 ROM. To install MacOS do I just boot off a retail cd and install? Any other things to be aware of? I've been out of the loop for a while (summer+kids==busy!) - Want to try to install for VCFMW coming up (way too fast)
Unfortunately, not quite that simple. The problem with the 1.1.20.1 ROM is that it does not support the internal SCSI nor the internal video for MacOS (they work in AIX), and it does not properly enable the onboard MACE Ethernet. Also, Mac OS will treat it as a generic PowerSurge system and whack the nvramrc as well as the Open Firmware input and output devices after it starts up, meaning the ANS will boot once, and then go to a black screen on the next boot after that. Everything else will work, even ADB, but you'll get no video at all - even from a discrete video card - until you change the devices from the serial port, or zap PRAM. After that, once again you'll get one boot and the same thing will happen.
Without the extension pack I'm working on, you'll need the following:
- Something for the external SCSI port to boot from and store to. I use a 25-pin external BlueSCSI. Works fine on termination power. It has both the 9.1 CD image and the 9.1 hard disk image. You can use the front floppy, but none of the internal drive trays will otherwise work for Mac OS (they will still work for AIX).
- A PCI video card. Any Mac compatible one will work. I use a Twin Turbo, but an ATI card should be fine, like a Rage or Rage 128 or early Radeon.
- A copy of Boot Variables ( ftp://ftp.netbsd.org/pub/NetBSD/arch/macppc/macos-utils/bootvars/ ) or some other way of setting Open Firmware variables from inside Mac OS.
- (optional) A PCI Ethernet card. I use a real ANS 10Mbit card, but if you don't care about it working in AIX, then any Mac compatible card will do.
I would use at least Mac OS 8. 7.6 will boot, but does not support the ANS 10Mbit card, whereas I know 9.1 does at least, and I'm pretty sure 8.6 and 8.1 do too.
Install the ROM stick, ensure PRAM is clean (e.g., have the PRAM battery out, etc.) and connect to the onboard VGA first. Assuming no AIX drives are found, it will drop to Open Firmware on screen. Move your monitor to the video card and blindly type "bye" on the ADB keyboard. After a pause you should see a Happy Mac as it boots from your CD image or external CD. Install Mac OS as usual.
After Mac OS boots, run Boot Variables immediately and make sure
input-device is
kbd (not
ttya),
output-device is
screen, and
use-nvramrc? is
not checked, and Write them to NVRAM. You may want to save these settings as a file to reduce some keyboard work. You need to do this every time Mac OS runs, or you will get a black screen the next time.
The extensions pack plan is to enable internal video (which can mirror or be a screen of its own if you use a PCI video card too), internal SCSI (but not for booting, sorry), internal Ethernet and also fix the black screen problem between reboots by doing those patches for you.
More about Mac OS on 1.1.20.1:
https://oldvcr.blogspot.com/2026/01/hands-on-with-two-apple-network-server.html