Amiga 3000 with superkick roms, questions.

[Castellen]

Haven't seen the A2000 ROM compatibility mode before, is it a jumper only fitted to certain A3000D boards??

I know some A3000D had jumpers to allow the use of 2Mb ROMs instead of the standard 4Mb (256k x 16).  It just tied address bit 0 and 17 together on each ROM, nothing special.


The A3000 addresses the ROMs at 32 bits wide, which is why you use two 16 bit ROMs.
The A2000 addresses the ROM at 16 bits wide, hence you only need a single 16 bit ROM.

If you were to make the A3000 address it at 16 bits instead, you'd put the single ROM at the lower half of the data bus D0 to D15 (I.E. use socket U180).

[Castellen]

@Quixote:
Those are the correct device and path names.
However, the computer needs the special OS 1.4 "softboot" ROMs in order to do this.

The kickstart image is loaded from WB_2.x but in order to do so, the CPU needs to be able to use the SCSI controller, it needs to know the memory address range, etc.

If you power the computer up with no ROMs it will not do anything, because on startup the 68030 doesn't know how to do anything other than begin executing code from it's boot vector (the start of the ROM address range).