Re: [midatlanticretro] Re: franklin 1200 - what Apple OS will work on these without modificatio
- Thanks Bob. After VCF I will tackle this system, it's not booting
any Apple OS's, but it may be something on the mobo is bad like
RAM. It just dumps the system to ROM when I attempt to boot DOS
3.3. I have one of the boards with a slew of ePROMs on the
motherboard. Knowing it should boot up Apple DOS 3.3, allows me to
focus on the motherboard. I will use a known-working DOS 3.3, disk
drive, and drive controller. etc.
At 01:27 PM 4/21/2012, you wrote:
>It depends on the exact revision. The original machines were all
>"hard boot" and booted pretty much any Apple DOS version. They
>usually have about 8 EPROMs on the motherboard.
>Later, we had the softboot machines. They had a single EPROM and
>required a slightly modified disk to boot. The idea was that since
>we were being sued by Apple, and since we had multiple third-party
>companies writing compatible but different monitors and BASICs, the
>boot ROMs in the softboot machines would load EVERYTHING from the
>disk, not just the DOS. Somewhere I have the source to the softboot
>monitor, but not handy, so I'm going from memory. I think most
>Apple or Franklin boot disks should work, but they might hang. I've
>found that pressing RESET after they hang brings it back to a useable state.
>One of my motherboards is a softboot but it's on display, not in a
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