Bootloader0x0000––
User Program——
Kernel——
MMIO0xFF00–0xFFFF256 B
SAR0xFF20Source address
DAR0xFF24Dest address
WCR0xFF28Word count
CSTR0xFF2CCtrl/Status
BUFFER0xFF00Sector buffer 512 B
SECTOR0xFF04Sector select
CSTR0xFF18Control/status
CNTR0xFF1CCounter
DSP_DATA0xFF10Terminal output
KBD_DATA0xFF08Key data
KBD_STAT0xFF0CKey ready
SysCLK0xFF14Clock KHz