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Diffstat (limited to 'README')
-rw-r--r-- | README | 12 |
1 files changed, 8 insertions, 4 deletions
@@ -96,16 +96,20 @@ If you build a custom kernel, note the following configuration items: - CONFIG_CRC_CCITT must be enabled ('y' or 'm'). On 2.6 kernels this can be selected These can be selected from the "Library Routines" submenu during kernel configuration via "make menuconfig". -- If you don't have any zaptel hardware, you need ztdummy. +- If you don't have any zaptel hardware, you need ztdummy. ztdummy takes + its timing from the kernel. It can use either of the following: * ztdummy on i386/x86_64 with kernels >= 2.6.22 can (and should) use high resolution times (CONFIG_HIGH_RES_TIMERS), and (if available, - the system HPET. + the system HPET. This shows as "source: HRTimer". This is + recommended. * ztdummy on i386/x86_64 and later kernels (>= 2.6.15) can use the - system's RTC (Real Time Clock). + system's RTC (Real Time Clock). This shows as "source: RTC". + * Failing that, on Linux 2.6 kernels with HZ=1000 (was the default + before 2.6.13). This shows as "source: Linux26". * Alternatives to that for ztdummy are a UHCI USB controller (USB controllers made by Intel or VIA) or a kernel that has HZ=1000 (default on kernels 2.6.0-2.6.12, optional on newer kernels. Not - possible on 2.4). + possible on 2.4). This shows as: "source: UHCI". A Build System |