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Changes between Version 50 and Version 51 of io_operations

v50	v51
140	140	The target hardware architectures generally provide a variable - but bounded - number of text terminals (called TXT channels in ALMOS-MKH). The actual number of terminals (NB_TXT_CHANNELS) is defined in the ''arch_info.bin'' file. We describe here how ALMOS-MKH uses these terminals:
141	141
142		'''1)''' The TXT[0] terminal is reserved for the kernel. It is normally used by the kernel to display log and/or debug messages. It can ~~only be used by the user processes for debug, through some specific system calls such as the panic() or display_xxx() function~~s, that should not be used in normal exploitation.
	142	'''1)''' The TXT[0] terminal is reserved for the kernel. It is normally used by the kernel to display log and/or debug messages. It can also be used by user processes for debug, through the specific display_xxx() system calls, that should not be used in normal exploitation.
143	143
144	144	'''2)''' The other (NB_TXT_CHANNELS - 1) terminals TXT[i] are shared resources used by user processes. During kernel initialization, ALMOS-MKH creates the first INIT user process, that creates itself (NB_TXT_CHANNELS -1) KSH user processes (one shell per user text terminal). All processes created by a KSH[i] process share the same TXT[i] terminal as the parent process, and belong to the same group of process.