(1) RAM type sis630 IPL.S read is not 04 I debug sis630 IPL.S, I find the RAM type value that IPL read is 01 or 00 for different RAM but not 04. But my RAM is definitely SDRAM. The code is: ........... movb $0x02, %al # Read the RAM Type (SPD byte 2) CALL_SP(read_spd) # of the dram on current DIMM. movb %bl, %al # %bl is 01 or 00 for different RAM,not 04 outb %al, $0x80 cmpb $0x04, %bl # If the RAM Type = SDRAM ?? jne no_sdram # no, exit .......
Is there any bug in the codes reading spd bytes? (2) for some Sis630 mainboard, docipl will hang. Linuxbios can't be executed. I think the RAM initialization procedure is as compatible as BIOS.
Thanks zhu
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zhu shi song