Why does my IIcx hang configuring the ADB without a keyboard and mouse attached?
The ADB hanging problem which only seems to affect those machines with dirty ROM’s (i.e. the SE/30, II, IIx, and IIcx…although I’ve only seen problems reported on the IIcx and SE/30). The manifestation of this problem is twofold: 1) Sometime after NetBSD 1.2.x, these machines would hang during boot if they didn’t have both a keyboard and a mouse attached. 2) Kernels from Nov 7, 1997 onward would hang these machines if an extended keyboard is attached. Note that this problem only seems to affect kernels using MRG_ADB. The HWDIRECT method appears to be immune. The problem is that (on these machines at least), the hardware seems to create a “ghost” keyboard or mouse when none is attached. On newer machines, a subsequent probe of these devices indicates that they are not really there. However, for those machines listed above, a probe of the non-existant device hangs in an infinite loop awaiting a reply. The reason why this has only shown up since 1.2 is that the extended mouse support pe
The ADB hanging problem which only seems to affect those machines with dirty ROM’s (i.e. the SE/30, II, IIx, and IIcx…although I’ve only seen problems reported on the IIcx and SE/30). The manifestation of this problem is twofold: 1) Sometime after NetBSD 1.2.x, these machines would hang during boot if they didn’t have both a keyboard and a mouse attached. 2) Kernels from Nov 7, 1997 onward would hang these machines if an extended keyboard is attached. Note that this problem only seems to affect kernels using MRG_ADB. The HWDIRECT method appears to be immune. The problem is that (on these machines at least), the hardware seems to create a “ghost” keyboard or mouse when none is attached. On newer machines, a subsequent probe of these devices indicates that they are not really there. However, for those machines listed above, a probe of the non-existant device hangs in an infinite loop awaiting a reply. The reason why this has only shown up since 1.2 is that the extended mouse support pe
