MacPlus skip memory test

Been doing a lot of tinkering with my MacPlus machines lately. They both have 4MB of RAM. The long memory test time was bothering my, so I patched ROM offset 0x0E0C to 601E. This unconditional branch really speeds up the cold boot. I'm starting to get to the age where I'll take a few minutes back every time I can :)

Wanted to share this for others who are tinkering with these ROMs.
 
I have been making some changes to the Rominator bytes for the MacPlus. Patches have only been applied to the 128KB ROM and 4KB driver stub. Nothing major, but bypassing the RAM count and auto-mounting the ROM disk in the Finder have proven pretty helpful for some other stuff I am working on.

The full 1024KB has been uploaded. Feel free of course to just pull out the bytes you want.

MOD 1: 0-fill embedded driver after jump to 420044
MOD 2: Jump to 420000 instead of 420044
MOD 3: Rename embedded driver to ROMDR
MOD 4: Change disk icon in driver
MOD 5: Change disk name to ROMDISK
MOD 6: Change case on this message: PRESS AND HOLD r NOW
MOD 7: Bypass RAM count to speed up cold boot
MOD 8: Auto-mount ROMDISK in Finder during normal boot
 

Attachments

Back
Top