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i386 port missing features:
* i386 cleaness (wbinvld is 486+ ... )
* Pentium TSC timer/udelay
* setup the BIOS data area and BIOS equipment word to reflect machine config.
* Make reset work (from Linux and from the boot prompt)
* DMA, FDC, RTC, KBC initialization
* video card support (call BIOS to initialize, use helper routrine in BSP to shadow
video rom if on pci) and PC keyboard
* split of part of cpu/i386/interrupt.c to cpu/i385/entry.c?
* re-entry of protected mode from real mode, should be added to realmode_switch.S
(and used by INT 10h and INT 16h handlers for console I/O during early
linux boot...)
* missing functions in lib_i386 and cpu/i386
* speaker beep interface
i386 port bugs:
* IDE does not work
SC520 missing features:
* Watchdog
* SC520 timer/udelay
* SC520 3rd PIC
* SC520 ICE serial
* SC520 MMCR reset
SC520 CDP board support missing features:
* Synchronius serial port and seriel EEPROM
* environment in SEEP
* environment in flash
* environment in sram
* status LED ?
* flash driver
SC520 CDP board support bugs:
* 0x680 LEDS dos not work for me
* is it possible to make both the internal serial ports and the
ports on the sio work at the same time?
* ali sio cio lines?
* On-borad ethernet does not work from Linux
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