I just tried out the RISCPC kernel from the 19981001 snapshot, but on
boot up I get:

initarm...
kernel loaded from file ADFS::IDEDisc5.$.RiscBSD.kernels.RISCPC
kernel arg string <BtRiscBSD$Dir>.BtRiscBSD
  ADFS::IDEDisc5.$.RiscBSD.kernels.RISCPC root=/dev/wd1a
  screenmode=X1024 Y768 C256 F60 maxproc=64 symtab

Boot configuration structure reports the following memory
  DRAM block 0a at 10000000 size 00400000
  DRAM block 0b at 14000000 size 00400000
  DRAM block 1a at 18000000 size 01000000
  DRAM block 1b at 1c000000 size 01000000
  VRAM block 0  at 02000000 size 00100000
initarm: Primary bootstrap ... done.
initarm: Secondary bootstrap ... mapping ...

at which point the little blue button is invoked. The bootloader is
V2.88. The cpu is a 610.

Cheers,

Patrick