Why doesn't the boot chime change if you swap ROMs?

[robin-fo]

Hi everyone,

I just put a Quadra 650 ROM into my IIsi. I was surprised to hear the original Macintosh II boot chime and not the one of the Quadras. So does the ROM store multiple boot chimes and play them according to the detected hardware?

 

[Phipli]

Hi everyone,

I just put a Quadra 650 ROM into my IIsi. I was surprised to hear the original Macintosh II boot chime and not the one of the Quadras. So does the ROM store multiple boot chimes and play them according to the detected hardware?

Did you remove the ROM select jumper on the logic board? And probably won't work.

 

[robin-fo]

Well my IIsi has no onboard ROM… Apple states that the ROMs are compatible, so I‘m not surprised it works.

I sadly cannot do further testing because attaching a hard drive in unknown condition (its spindle motor was stuck) just fried my poor IIsi’s logicboard

 

[Phipli]

Well my IIsi has no onboard ROM… Apple states that the ROMs are compatible, so I‘m not surprised it works.

I sadly cannot do further testing because attaching a hard drive in unknown condition (its spindle motor was stuck) just fried my poor IIsi’s logicboard

Argh sorry to hear about the issues. Are you sure you didn't use the wrong power cable for the disk? I think I remember there is different wiring for identical looking disk power cables? Or am I making that up?

I read IIci instead of IIsi accidentally in your original post. Whoops.

 

[robin-fo]

Well it was indeed not an original power cable (from a Mac Classic)… If I find the original one, I‘ll check the pinouts.

 

[Phipli]

Well it was indeed not an original power cable (from a Mac Classic)… If I find the original one, I‘ll check the pinouts.

That sounds like what I'm thinking of. LC (and classic) cables don't work in the IIsi etc.

 

[robin-fo]

That sounds like what I'm thinking of. LC (and classic) cables don't work in the IIsi etc.

Oh god! So did I inject 12V somewhere?

I read IIci instead of IIsi accidentally in your original post. Whoops.

Well that wouldn't be a big difference in our case as most IIsi's do have onboard ROMs. Apparently, you don't need to set the jumper (which the IIsi also has) if there is no onboard ROM.