=> R0 = territory number, or -1 to use current territory
R1 = timezone within territory
R4 = "ZONE" (&454E4F5A) to enable use of R1
<= R0 = pointer to name of standard time for territory
R1 = pointer to name of summer time for territory
R2 = offset from UTC to standard time, in cs (signed 32-bit)
R3 = offset from UTC to summer time, in cs (signed 32-bit)
R4 = 0 if extended API supported
Returns information on the timezones for a territory.
Where a territory, such as the USA, spans more than one timezone they can be iterated though by incrementing R1 from zero until an error is returned (noting the return value of R4 to check if this extension is supported at all).
See PRM 3, page 806.
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