internal-ROM0 instruction-bus 0x4000_0000 0x4003_FFFF
internal-ROM1 data-bus 0x3FF0_0000 0x3FF1_FFFF
internal-ROM1 instruction-bus 0x4004_0000 0x4005_FFFF
elf-later-addr unknown-bus 0x4000_0000 0x4005_8000