=> R0 = 0
R1 = 0 to display OS version
1 to return machine info
Display OS version
<= R0 = pointer to OS version string as an error block
R1 preserved
R2 corrupted
V set
Return machine info
<= R0 preserved
R1 = machine type
R2 corrupted
If R1=0 this call displays the OS version by returning it as an error string, with V set.
If R1=1 this call returns the machine type in R1 - all RISC OS machines return 6.
See PRM 1, page 936
OS_Byte 0 OS version return types
Number OS
0 Electron
1 BBC
2 BBC B+
3 Master 128
4 Master 128 Econet Terminal
5 Master 128 Compact
6 ARM based machine (Arthur and RISC OS)
7 Springboard (ARM on a PC ISA card)
8 UNIX
9 6809/6309
10 Mac OS X
17 6809/6309 (again)
28 Commodore 64/128
29 TI calculator
30 Amstrad CPC
31 Sinclair ZX Spectrum
32 DOS/Windows
39 6809/6309 (again)
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