rex_read
rex_read(dc, REX_PAGE1_GO, REX_P1REG_VC1_ADDRDATA);
return (rex_read(dc, REX_PAGE1_SET, REX_P1REG_VC1_ADDRDATA));
while (rex_read(dc, REX_PAGE1_SET,REX_P1REG_CFGMODE) & REX_CFGMODE_BUSY)
rex_read(dc, REX_PAGE1_GO, REX_P1REG_WCLOCKREV);
return (rex_read(dc, REX_PAGE1_SET, REX_P1REG_WCLOCKREV) & 0x7);
rex_read(dc, REX_PAGE0_GO, REX_P0REG_COMMAND);