OsByte/FX Call Summary
			    ======================

dec.	hex.	Function
 0	00	Return OS version number
 1	01	User OsByte call
 2	02	Select input stream
 3	03	Select output stream
 4	04	Select cursor editing state
 5	05	Select printer destination
 6	06	Set printer ignore character
 7	07	Set RS232 baud rate for receiving data
 8	08	Set RS232 baud rate for transmitting data
 9	09	Set flashing colour mark state duration
10	0A	Set flashing colour space state durarion
11	0B	Set keyboard auto-repeat delay interval
12	0C	Set keyboard auto-repeat rate
13	0D	Disable events
14	0E	Enable events
15	0F	Flush selected buffer class
16	10	Select number of ADC channels to be sampled
17	11	Force an ADC conversion
18	12	Reset soft keys
19	13	Wait for vertical sync
20	14	Explode character ram allocation and restore font
21	15	Flush specific buffer
22	16	Increment polling semaphore
23	17	Decrement polling semaphore
24	18	Select external sound system (Electron)
25	19	Restore default font definitions (Master)
26	1A
27	1B
28	1C
29	1D
30	1E
31	1F
32	20	Read highest memory address in current mode (WE Shadow Ram)
33	21	Read highest memory address for mode X (WE Shadow Ram) 	
34	22	Read/write shadow ram switch (WE Shadow Ram)
35	23	Return location of workspace (WE Shadow Ram)
36	24	Read/Write Ram buffer number (WE Shadow Ram)
37	25
38	26
39	27
40	28
41	29
42	2A
43	2B
44	2C
45	2D
46	2E
47	2F
48	30
49	31
50	32	Polling transmission (NFS)
51	33	Polling reception (NFS)
52	34	Delete a receive block (NFS)
53	35	Severe a remote connection (*ROFF) (NFS)
54	36
55	37
56	38
57	39
58	3A
59	3B


			    OsByte/FX Call Summary
			    ======================

dec.  hex.	function
60	3C
61	3D
62	3E
63	3F	Copy CCP from rom (ZNOS)
64	40
65	41
66	42
67	43
68	44	Test for sideways ram
69	45	Sideways ram allocation
70	46
71	47
72	48
73	49
74	4A
75	4B
76	4C
77	4D
78	4E
79	4F
80	50
81	51
82	52
83	53
84	54
85	55
86	56
87	57
88	58
89	59
90	5A	HCE Rom service call
91	5B
92	5C
93	5D
94	5E
95	5F
96	60	Terminal emulator control call
97	61
98	62
99	63
100	64
101	65
102	66
103	67
104	68
105	69
106	6A	Select pointer/active mouse
107	6B	Select 1MHz bus/cartridge
108	6C	Select screen memory for direct access
109	6D	Make temporary fs permanent
110	6E
111	6F	Read/Write shadow ram switch (Aries-B32, WE Shadow Ram)
112	70	Select memory for VDU access
113	71	Select memory for display
114	72	Write shadow memory use
115	73	Blank or restore palette (Electron)
116	74	Reset sound system (Electron)
117	75	Read VDU status
118	76	Reflect keyboard status in LEDs and return CTRL/SHIFT keys
119	77	Close and *SPOOL or *EXEC files


			    OsByte/FX Call Summary
			    ======================

dec.  hex.	function
120	78	Write current keys pressed information
121	79	Perform keyboard scan
122	7A	Perform keyboard scan from 16 (&10)
123	7B	Inform OS, printer going dormant
124	7C	Clear ESCAPE condition
125	7D	Set ESCAPE condition
126	7E	Acknowledge ESCAPE condition and clear with effects
127	7F	Check for EOF on open file
128	80	Read ADC channel or get buffer/mouse status
129	81	Read key within time limit/machine type
130	82	Read machine high order address
131	83	Read top of OS ram, bottom of user ram address (OSHWM)
132	84	Read top of user ram address
133	85	Read screen start address for given mode
134	86	Read text cursor position (POS and VPOS)
135	87	Read character at cursor position and mode
136	88	Perform *CODE
137	89	Perform *MOTOR
138	8A	Insert value into buffer
139	8B	Perform *OPT
140	8C	Perform *TAPE
141	8D	Perform *ROM
142	8E	Enter language rom
143	8F	Issue paged rom service request
144	90	Perform *TV
145	91	Get character from buffer
146	92	Read from FRED, 1MHz bus
147	93	Write to FRED, 1MHz bus
148	94	Read from JIM, 1MHz bus
149	95	Write to JIM, 1MHz bus
150	96	Read from SHEILA, mapped I/O
151	97	Write to SHEILA, mapped I/O
152	98	Examine buffer status
153	99	Insert character into buffer
154	9A	Write to video ULA control register/Reset flash cycle (El)
155	9B	Write to video ULA palette register
156	9C	Read/Write 6850 control register
157	9D	Fast Tube BPUT
158	9E	Read from speech processor
159	9F	Write to speech processor
160	A0	Read VDU variable value
161	A1	Read configuration Ram/Enable Graphics rom
162	A2	Write configuration Ram
163	A3
164    A4	Check for 6502 code
165	A5	Read output cursor position
166	A6  236	  Read start address of OS variables (low byte)
167	A7  237	  Read start address of OS variable (high byte)
168	A8  238	  Read start address of ROM pointer table (low byte)
169	A9  239	  Read start address of ROM pointer table (high byte)
170	AA  23A	  Read address of ROM information table (low byte)
171	AB  23B	  Read address of ROM information table (high byte)
172	AC  23C	  Read address of key translation table (low byte)
173	AD  23D	  Read address of key translation table (high byte)
174	AE  23E	  Read start address of OS VDU variables (low byte)
175	AF  23F	  Read start address of OS VDU variables (high byte)
176	B0  240	  Read/write CFS timout counter
177	B1  241	  Read/write input source
178	B2  242	  Read/write keyboard semaphore
179	B3  243	  Read/write primary OSHWM/Rom polling semaphore


			    OsByte/FX Call Summary
			    ======================

dec.  hex. addr  function
180	B4  244   r/w current OSHWM
181	B5  245	  r/w RS232 mode
182	B6  246	  r/w character explosion state/noignore setting
183	B7  247	  r/w cassette/Rom filing system switch
184	B8  248	  r/w OS copy of video ULA control register
185	B9  249	  r/w OS copy of video ULA palette register
186	BA  24A	  r/w Rom active on last error
187	BB  24B	  r/w Rom number containing Basic
188	BC  24C	  r/w current ADC channel
189	BD  24D	  r/w number of ADC channels
190	BE  24E	  r/w ADC conversion type
191	BF  24F	  r/w RS232 use flag
192	C0  250	  r/w RS232 control flag
193	C1  251	  r/w flash counter
194	C2  252	  r/w mark period count
195	C3  253	  r/w space period count
196	C4  254	  r/w keyboard auto-repeat delay
197	C5  255	  r/w keyboard auto-repeat period
198	C6  256	  r/w *EXEC file handle
199	C7  257	  r/w *SPOOL file handle
200	C8  258	  r/w ESCAPE and BREAK effects
201	C9  259	  r/w Econet keyboard disable
202	CA  25A	  r/w keyboard status byte
203	CB  25B	  r/w RS232 handshake event/Electon IRQ bit mask
204	CC  25C	  r/w RS232 input supression/Election firm key pointer
205	CD  25D	  r/w cassette/RS232 selection flag
206	CE  25E	  r/w Econet OS call interception status
207	CF  25F	  r/w Econet OSRDCH interception status
208	D0  260	  r/w Econet OSWRCH interception status
209	D1  261	  r/w speech supression status
210	D2  262	  r/w sound supression status
211	D3  263	  r/w BELL channel
212	D4  264	  r/w BELL envelope number/amplitude
213	D5  265	  r/w BELL frequency
214	D6  266	  r/w BELL duration
215	D7  267	  r/w startup message and !BOOT option
216	D8  268	  r/w length of soft key string
217	D9  269	  r/w number of lines printed since last page
218	DA  26A	  r/w number of items in VDU queue
219	DB  26B	  r/w TAB character value
220	DC  26C	  r/w ESCAPE character
221	DD  26D	  r/w character &C0 to &CF status
222	DE  26E	  r/w character &D0 to &DF status
223	DF  26F	  r/w charceter &E0 to &EF status
224	E0  270	  r/w charceter &F0 to &FF status
225	E1  271	  r/w character &80 to &8F status (function keys)
226	E2  272	  r/w character &90 to &9F status (Shift-function keys)
227	E3  273	  r/w character &A0 to &AF status (Ctrl-function keys)
228	E4  274	  r/w character &B0 to &BF status (Shift-Ctrl-function keys)
229	E5  275	  r/w ESCAPE key status
230	E6  276	  r/w ESCAPE effects flag
231	E7  277	  r/w user 6522 IRQ bit mask
232	E8  278	  r/w 6850 IRQ bit mask/Electron external sound semaphore
233	E9  279	  r/w system 6522 IRQ bit mask
234	EA  27A	  r/w Tube presence flag
235	EB  27B	  r/w speech processor presence flag
236	EC  27C	  r/w write character destination status (*FX 3)
237	ED  27D	  r/w cursor editing state (*FX 4)
238	EE  27E	  r/w base for numberic keypad
239	EF  27F	  r/w Screen shadow state (*FX 114)


			    OsByte/FX Call Summary
			    ======================

dec.  hex. addr  function
240	F0  280	  r/w country code
241	F1  281	  r/w user flag (*FX 1)
242	F2  282	  r/w OS copy of serial ULA
243	F3  283	  r/w timer switch state
244	F4  284	  r/w soft key consistancy flag
245	F5  285	  r/w printer destination status (*FX 5)
246	F6  286	  r/w character ignored by printer (*FX 6)
247	F7  287	  r/w first byte of BREAK interception code
248	F8  288	  r/w second byte of BREAK interception code
249	F9  289	  r/w third byte of BREAK interception code
250	FA  28A	  r/w memory used for VDU output (*FX 112)
251	FB  28B	  r/w memory used for VDU display (*FX 113)
252	FC  28C	  r/w current language rom number
253	FD  28D	  r/w last BREAK type
254	FE  28E	  r/w available Ram/Shift key effect on keypad
255	FF  28F	  r/w startup options