binder@dosadi.DEC (No matter where you go, there you are.) (12/09/85)
Subject: Re: Re: prodos on an apple ][+ (old question Another revisiting of this issue... >> In the PROM, my version of ProDos 1.0.1 looks for the words >> "Apple ][", and in the disk drive it looks for a bit pattern in the >> drive controller card to make sure it is an Apple card. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ >> While looking at the disk controller it determins if there is a ProFile >> or if it is a 5 1/2" disk drive. > I have booted ProDos on non-Apple disk controller cards, so part of this > claim is untrue. I suspect ProDos is just trying to figure out whether > it has a disk controller, and if so, what type. Dunno about the disk card check, as mine is an Apple. But the test for modified ROMs is indeed probably restricted to a test for the wprd "APPLE" in the right place; my motherboard's ROMs have been modified to eliminate the lowercase foldover. The first pass I made had "APPLE ][" changed, and ProDOS wouldn't boot. I changed that text back, and ProDOS came up. Cheers, Dick Binder (The Stainless Steel Rat) UUCP: { decvax, allegra, ucbvax... }!decwrl!dec-rhea!dec-dosadi!binder ARPA: binder%dosadi.DEC@decwrl.ARPA Mon 9-Dec-1985 08:55 Eastern Standard Time
sorensen@amdcad.UUCP (Tim Olson) (12/11/85)
|| In the PROM, my version of ProDos 1.0.1 looks for the words || "Apple ][", and in the disk drive it looks for a bit pattern in the || drive controller card to make sure it is an Apple card. | Dunno about the disk card check, as mine is an Apple. But the test for | modified ROMs is indeed probably restricted to a test for the wprd "APPLE" in | the right place; my motherboard's ROMs have been modified to eliminate the | lowercase foldover. The first pass I made had "APPLE ][" changed, and ProDOS | wouldn't boot. I changed that text back, and ProDOS came up. | | Cheers, | Dick Binder (The Stainless Steel Rat) Except that ProDOS boots on my Apple ][ (no '+'), which does not contain the autostart ROM with the "APPLE ][" banner. It does know that my machine is a ][ instead of a ][+, so the check may just be to see what type of apple it is booting on (][, ][+, //e, //c, ...) which all have differences in their ROMs. Tim Olson Advanced Micro Devices inhp4!amdcad!sorensen