Re: white screen when booting 9.1 on quadra 700

On Mon, Oct 26, 2020 at 06:06:40PM +0000, [email protected] wrote:
> across multiple boot attempts, if i press the interrupt button, the debugger always seems to stop in the exact same place, varying only when i change the kernel version. for the released 9.1 kernel, it is as follows:
> 
>     [   1.0000000] Panic switch: PC is 0x1c32c.                                  
>     Stopped in pid 0.1 (system) at  29eb8:  unlk    a6                           
>     db>            

This is good, as you get the kernel loaded and started a bit at least.
From what medium are you loading the kernel, and could you try custom kernels?

0x1c32c is in zstty_softint1 (../../../../dev/ic/z8530tty.c:1638).
1633				if (ISSET(zst->zst_rx_flags, RX_IBUF_BLOCKED)) {
1634					CLR(zst->zst_rx_flags, RX_IBUF_BLOCKED);
1635					zs_hwiflow(zst);
1636				}
1637			}
1638			mutex_spin_exit(&cs->cs_lock);
1639		}
1640	
1641	#if 0
1642		printf("%xS%04d\n", zst->zst_rx_flags, zst->zst_rbavail);


Does it always show exactly this location?

Martin