First web implementation draft of the draft

README.md

@@ -87,7 +87,7 @@ The lower nibble (bits 0 to 3) of the status can be modified from the applicatio
 
 ## Sound output
 
-ESOP supports monophonic sound output with a beeper controllable via `0x06` port. As long as the port value is non-zero, the beeper must emit a sound wave of the specified frequency. The frequency is specified in semitones relative to A4 (440 Hz), with A4 itself being located at `0x80` value.
+ESOP supports monophonic sound output with a beeper controllable via `0x06` port. As long as the port value is non-zero, the beeper must emit a sound wave of the specified frequency. The frequency is specified in semitones relative to A4 (440 Hz), with A4 itself being located at `0x30` value.
 
 ## System calls
 
@@ -107,6 +107,7 @@ The only system call required to be implemented in any ESOP-compatible runtime i
 
 - serial/debug port I/O;
 - persistent/flash memory I/O (up to 16 MB), operating with 256-byte pages or individual bytes; 
+- setting and getting datetime information;
 - initiating and receiving GSM voice calls;
 - sending DTMF signals during active voice calls;
 - active voice call manipulation (terminate, hold/unhold, bridge); 
@@ -130,8 +131,8 @@ ID    |Params           |Command|Meaning
 `0x03`|1s 3b [addr addr]|`0xa3` |Read a byte under the 3-byte flash address
 `0x04`|1b 3b [page addr]|`0x84` |Write a page under the 3-byte flash address
 `0x05`|1b 3b [page addr]|`0x85` |Read a page under the 3-byte flash address
-`0x06`|||(reserved)
-`0x07`|||(reserved)
+`0x06`|1s [addr]        |`0x46` |Read the current system time/date information (5 bytes/40 bits, Unix time) into the address
+`0x07`|1s [addr]        |`0x47` |Set the current system time/date information (5 bytes/40 bits, Unix time) from the address
 `0x08`|||(reserved)
 `0x09`|||(reserved)
 `0x0a`|||(reserved)