1.1: initial import
1.3: Add ELF support
1.4: loadfile() update: ELF symbols no longer need backward seeks.
1.5: loadfile() update to avoid backwards seeks for ELF Program Headers.
1.6: Fix a bug on DMA reg accesses and a problem on detecting old drives
1.7: Add support of NeXT_CUBE_TURBO
1.8: Fix DELAY() to actually wait specified microsconds