Cirkit Prestel Link (UK) (1985) (3. Documentation Files) [Original] [TAPE] [UTILITAIRE].cdt
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0085E0: 6D 69 6E 61 6C 20 20 69 6E 0D 0A 6F 6E 65 20 6F minal in..one o
0085F0: 66 20 74 77 6F 20 73 63 72 65 65 6E 20 6D 6F 64 f two screen mod
008600: 65 73 2E 0D 0A 0D 0A 53 79 6E 74 61 78 0D 0A 0D es.....Syntax...
008610: 0A 7C 50 52 45 53 54 45 4C 2C 20 20 20 5B 3C 6D .|PRESTEL, [<m
008620: 6F 64 65 3E 20 20 5B 2C 3C 63 6F 6C 31 3E 20 20 ode> [,<col1>
008630: 5B 2C 3C 63 6F 6C 32 3E 0D 0A 5B 2C 3C 63 6F 6C [,<col2>..[,<col
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008680: 72 65 64 69 73 70 6C 61 79 65 64 20 20 69 6E 20 redisplayed in
008690: 20 50 72 65 73 74 65 6C 20 6D 6F 64 65 20 20 30 Prestel mode 0
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0086C0: 20 62 65 20 65 69 74 68 65 72 20 30 20 20 6F 72 be either 0 or
0086D0: 0D 0A 31 2E 0D 0A 0D 0A 46 6F 72 20 50 45 E9 72 ..1.....For PE.r
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0086F0: 20 69 6E 6B 20 63 6F 6C 6F 75 72 73 20 20 61 72 ink colours ar
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008710: 69 6E 67 6C 79 2E 0D 0A 0D 0A 46 6F 72 20 20 6D ingly.....For m
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0087D0: 0D 0A 0D 0A 54 68 65 20 20 5B 43 4F 50 59 5D 74 ....The [COPY]t
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0087F0: 61 73 20 20 61 20 20 72 65 76 65 61 6C 0D 0A 74 as a reveal..t
008800: 6F 67 67 6C 65 2E 0D 0A 0D 0A 49 66 20 74 68 65 oggle.....If the
008810: 20 63 6F 6D 6D 61 6E 64 20 7C 53 45 54 55 50 20 command |SETUP
008820: 63 61 6E 6E 6F 74 20 62 65 20 20 66 6F 75 6E 64 cannot be found
008830: 2C 0D 0A 62 65 63 61 75 73 65 20 74 68 65 20 75 ,..because the u
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008850: 20 6E 6F 74 20 20 62 65 65 6E 0D 0A 6C 6F 61 64 not been..load
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008870: 65 72 66 61 63 65 20 77 69 6C 6C 20 62 65 20 20 erface will be
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008890: 74 61 20 62 69 74 73 2C 20 31 32 30 30 2F 37 35 ta bits, 1200/75
0088A0: 20 62 61 75 64 2C 20 20 65 76 65 6E 0D 0A 70 61 baud, even..pa
0088B0: 72 69 74 79 2E 20 20 20 4F 74 68 65 72 77 69 73 rity. Otherwis
0088C0: 65 20 74 68 65 20 20 73 65 74 74 69 6E 67 73 20 e the settings
0088D0: 20 66 72 6F 6D 0D 0A 7C 53 45 54 55 50 20 77 69 from..|SETUP wi
0088E0: 6C 2E E7 FF FF FF FF 11 37 09 A6 04 A6 04 9B 04 l.......7.......
0088F0: 35 09 01 10 08 0F 00 07 01 00 2C 52 53 58 2E 44 5.........,RSX.D
008900: 4F 43 00 00 00 00 00 00 00 00 00 0D FF 16 C8 07 OC..............
008910: 80 A3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .£..............
008920: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
008930: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
008940: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
008950: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
008960: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
008970: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
008980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
008990: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0089A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0089B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0089C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0089D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0089E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0089F0: 00 00 00 00 00 00 00 00 00 00 00 6F AE FF FF FF ...........o....
008A00: FF 11 34 09 A6 04 A6 04 AB 04 56 09 01 10 08 0F ..4.......V.....
008A10: 00 15 08 00 16 6C 20 62 65 20 75 73 65 64 2E 0D .....l be used..
008A20: 0A 0D 0A 45 78 61 6D 70 6C 65 73 0D 0A 0D 0A 50 ...Examples....P
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008A40: 20 20 7C 50 52 45 53 54 45 4C 0D 0A 50 72 65 73 |PRESTEL..Pres
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008A60: 50 52 45 53 54 45 4C 2C 20 31 2C 32 2C 36 2C 31 PRESTEL, 1,2,6,1
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008AC0: 20 70 72 69 6F 72 20 74 6F 20 20 74 68 65 0D 0A prior to the..
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008AE0: 2E 0D 0A 0D 0A 54 68 65 20 72 65 63 6F 6D 6D 65 .....The recomme
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008B20: 49 6E 6B 20 20 63 6F 6C 6F 75 72 73 20 73 70 65 Ink colours spe
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008BC0: 20 20 6D 6F 64 65 20 20 69 73 20 20 65 78 69 74 mode is exit
008BD0: 65 64 20 20 77 68 65 6E 20 20 61 20 20 6B 65 79 ed when a key
008BE0: 0D 0A 72 65 74 75 72 6E 69 6E 67 20 20 41 53 43 ..returning ASC
008BF0: 49 49 20 30 46 43 48 20 69 73 20 70 72 65 73 73 II 0FCH is press
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008C20: 79 20 5B 43 54 52 4C 5D 20 5B 45 53 43 5D 2E 0D y [CTRL] [ESC]..
008C30: 0A 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F ._______________
008C40: 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F ________________
008C50: 5F 5F 5F 5F 5F 5F 5F 5F 0D 0A 0D 0A 7C 4C 4F 41 ________....|LOA
008C60: 44 50 41 47 45 0D 0A 0D 0A 55 73 65 0D 0A 0D 0A DPAGE....Use....
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008CA0: 47 45 2E 0D 0A 0D 0A 53 79 6E 74 61 78 0D 0A 0D GE.....Syntax...
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008DF0: 64 20 20 20 77 69 74 68 0D 0A 7C 44 49 53 50 4C d with..|DISPL
008E00: 41 59 2E 0D 0A 0D 0A 45 78 61 6D 70 6C 65 73 0D AY.....Examples.
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008E30: 20 20 20 20 20 20 20 61 24 3D 22 70 61 67 65 31 a$="page1
008E40: 22 3A 20 20 7C 4C 4F 41 44 50 41 47 45 2C 20 40 ": |LOADPAGE, @
008E50: 61 24 0D 0A 0D 0A 0D 0A 32 5D 20 4C 6F 61 64 20 a$......2] Load
008E60: 61 20 70 61 67 65 20 75 6E 64 65 72 20 42 41 53 a page under BAS
008E70: 49 43 20 31 2E 31 3A 0D 0A 20 20 20 20 20 20 20 IC 1.1:..
008E80: 7C 4C 4F 41 44 50 41 47 45 2C 20 22 70 61 67 65 |LOADPAGE, "page
008E90: 31 22 0D 0A 0D 0A 4E 6F 74 65 73 0D 0A 0D 0A 54 1"....Notes....T
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008EB0: 65 64 20 75 73 69 6E 67 20 20 74 68 65 20 20 63 ed using the c
008EC0: 75 72 72 65 6E 74 0D 0A 66 69 6C 69 6E 67 20 73 urrent..filing s
008ED0: 79 73 74 65 6D 2C 20 65 69 74 68 65 72 20 54 41 ystem, either TA
008EE0: 50 45 20 6F 72 20 41 4D 53 44 4F 53 2E 0D 0A 5F PE or AMSDOS..._
008EF0: 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F ________________
008F00: 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F ________________
008F10: 5F 5F 5F 5F 5F 5F 0D 0A 0D 0A 7C 53 41 EB 4E 56 ______....|SA.NV
008F20: 45 50 41 47 45 0D 0A 0D 0A 55 73 65 0D 0A 0D 0A EPAGE....Use....
008F30: 54 6F 20 20 73 61 76 65 20 20 74 68 65 20 63 6F To save the co
008F40: 6E 74 65 6E 74 73 20 6F 66 20 20 74 68 65 20 20 ntents of the
008F50: 50 72 65 73 74 65 6C 0D 0A 66 72 61 6D 65 20 62 Prestel..frame b
008F60: 75 66 66 65 72 20 74 6F 20 61 20 64 61 74 61 20 uffer to a data
008F70: 66 69 6C 65 2E 0D 0A 0D 0A 53 79 6E 74 61 78 0D file.....Syntax.
008F80: 0A 0D 0A 7C 53 41 56 45 50 41 47 45 2C 20 3C 66 ...|SAVEPAGE, <f
008F90: 69 6C 65 6E 61 6D 65 3E 0D 0A 0D 0A 4F 70 65 72 ilename>....Oper
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008FC0: 65 3E 20 73 68 6F 75 6C 64 20 20 62 65 20 20 61 e> should be a
008FD0: 0D 0A 72 65 66 65 72 65 6E 63 65 20 74 6F 20 61 ..reference to a
008FE0: 20 73 74 72 69 6E 67 20 76 61 72 69 61 62 6C 65 string variable
008FF0: 2C 20 73 65 74 20 20 74 6F 0D 0A 74 68 65 20 6E , set to..the n
009000: 61 6D 65 20 6F 66 20 74 68 65 20 66 69 6C 65 2E ame of the file.
009010: 0D 0A 0D 0A 44 61 74 61 20 20 69 73 20 77 72 32 ....Data is wr2
009020: 01 69 74 74 65 6E 20 74 6F 20 74 68 65 20 66 69 .itten to the fi
009030: 6C 65 20 75 73 69 6E 67 20 20 74 68 65 0D 0A 63 le using the..c
009040: 75 72 72 65 6E 74 6C 79 20 61 63 74 69 76 65 20 urrently active
009050: 66 69 6C 69 6E 67 20 73 79 73 74 65 6D 2C 20 20 filing system,
009060: 65 69 74 68 65 72 0D 0A 54 41 50 45 20 6F 72 20 either..TAPE or
009070: 41 4D 53 44 4F 53 2E 0D 0A 0D 0A 45 78 61 6D 70 AMSDOS.....Examp
009080: 6C 65 73 0D 0A 0D 0A 31 5D 20 20 53 61 76 65 20 les....1] Save
009090: 20 74 68 65 20 70 61 67 65 20 74 6F 20 74 68 65 the page to the
0090A0: 20 20 66 69 6C 65 20 20 63 61 6C 6C 65 64 0D 0A file called..
0090B0: 22 70 61 67 65 31 22 3A 0D 0A 20 20 20 20 20 20 "page1":..
0090C0: 20 20 20 20 20 20 61 24 3D 22 70 61 67 65 31 22 a$="page1"
0090D0: 3A 20 7C 53 41 56 45 50 41 47 45 2C 40 61 24 0D : |SAVEPAGE,@a$.
0090E0: 0A 0D 0A 32 5D 20 53 61 76 65 20 74 68 65 20 70 ...2] Save the p
0090F0: 61 67 65 20 75 6E 64 65 72 20 42 41 53 49 43 20 age under BASIC
009100: 31 2E 31 3A 0D 0A 20 20 20 20 20 20 20 20 20 20 1.1:..
009110: 20 20 7C 53 41 56 45 50 41 47 45 2C 20 22 50 41 |SAVEPAGE, "PA
009120: 47 01 90 45 31 22 0D 0A 0D 0A 4E 6F 74 65 73 0D G..E1"....Notes.
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009140: 61 76 65 64 20 69 6E 20 42 49 4E 41 52 59 20 66 aved in BINARY f
009150: 6F 72 6D 61 74 2E 20 20 49 66 0D 0A 41 4D 53 44 ormat. If..AMSD
009160: 4F 53 20 20 69 73 20 20 69 6E 20 75 73 65 20 74 OS is in use t
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009180: 69 6C 6C 0D 0A 68 61 76 65 20 20 61 20 2E 42 49 ill..have a .BI
009190: 4E 20 65 78 74 65 6E 73 69 6F 6E 20 61 64 64 65 N extension adde
0091A0: 64 20 74 6F 20 20 69 74 20 20 69 66 0D 0A 6E 6F d to it if..no
0091B0: 6E 65 20 69 73 20 73 70 65 63 69 66 69 65 64 2E ne is specified.
0091C0: 0D 0A 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F ..______________
0091D0: 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F 5F ________________
0091E0: 5F 5F 5F 5F 5F 5F 5F 5F 5F 0D 0A 00 00 00 00 00 _________.......
0091F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
009200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
009210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
009220: 00 00 00 12 56 FF FF FF FF ....V....
RESULT OF SEARCH :
PRO=16 CHEA=0 COD=21 MUSI=0 COP=3 GRA=5 WRIT=20 198=2 199=0 STARTER=0 KBI=0 CAAV=0 L.TOURNIER=0
PRO=16 CHEA=0 COD=21 MUSI=0 COP=3 GRA=5 WRIT=20 198=2 199=0 STARTER=0 KBI=0 CAAV=0 L.TOURNIER=0
432,HARDWARE.DOC£1R*************************************** *
* * Reproduction or translation of * * any part of
this documentation * * without the written permission of * * HoneySoft Lt
d is unlawful. * * * * An Advanc
ed User Guide covering * * all the information supplied here * * and mo
re is available from * * HoneySoft Limited. * *
* * Copyright (c) 198Q5 HoneySoft Ltd. * *
* ***************************************
CIRKIT MODEM 1200 TO AMSTRAD CPC464/664/128 INTERFACE HARDWARE SPE
CIFICATION Introduction This document presents the hardware specifi
cation for a minimal parts serial interface to allow the Cirkit Modem
1200 to communicate with the Amstrad range of CPC computers. Feature
s o b Asychronous operation o 5, 6, 7 or 8 bit characters o 1, 1.5 or 2 s
top bits o Odd or even or no Parity, generation and checking o Framing,
overrun and parity error detection o Carrier Detect input (/DSR) o MU
TE output (Intended forT Half / Full duplex switching) o 1200/1200,
1200/75, 300/300 bps operation o RS232 compatible inputs, TTL
compatible outputs The Hardware An 8251 UART is used as the basis f
orc the design, associated with this are four support ICs. CPU Interfa
ce The 4MHz clock output from the expansion bus is used to derive t
he CLK input for the 8251. The active high 8251 RESET input is derived
from the bus /RESET line. Two OR gates provide the necessary address de
coding. I/O Address Map Two addresses are used from the I/O address
map. The addresses used are tho0W),HARDWARE.DOC£C1Tse recommended by
Amsoft for communications peripherals, and are therefore compatible wi
th all Amstrad peripherals, with the exception of other communications d
evices. ADDRESS READ WRITE 0FADFH DATA IN DATA OUT 0FBDFH
STATUS CONTROL 0FADFH Data input/output register 0FBDFH S
tatus / Control register When read, returns the UART status. /DSR is used as
a Carrier Detect input. When written after a soft or hard reset, acc
esses the Mode Instruction register are used to define operating parameter
s. After writing the Mode Instruction word, this address then accesse
s the Command instruction register. /DTR is used in conjunction with the
selected clock ratio to set the desired baud rate. /RTS is used as a MUTE lin
e, to switch the Modem into half or full duplex. D7 should be sent as a 0.
Refer to a data sheet on the 8251 for detailed description of regis
ter assignments. Modem Interface Four signals control data transfer vi
a the Modem and 8251, these are Transmit Data TTL level Output. 0Mark,
1Space (+5V). Data to the Modem. Receive Data TTL leveBsl Input. +5VSpac
e, 0VMark Data from the Modem. Diode clamped to allow RS232 compatability.
Mute TTL level Output. +5VMute This signal is driven directly by the 825
1 /RTS output. The Modem's transmitter should be disabled when M
UTE is TTL logic 1. Carrier detect TTL level Input. 0VCarrier Detected Car
rier detect input from modem. Diode clamped for RS232 compatibility. Should b
e connected to 0V if not in use. Cable assignmeL0nt The modem interface
lines are brought out along a 6 core cable to a 5 pin DIN plug to allow a M
odem or other device to be connected. Pin connections as follows Black
- Ground 0V Brown - Transmit data (to Modem) Red - Receive2W.,HARDWAR
E.DOC£1H/ data (from Modem) White - +5V from computer Yellow - MUTE (to Mo
dem) Green - Carrier Detect (from Modem) Shield - Ground 0V 5 Pin DIN
Connections The pin connections to the 5 pin DIN are 1 - Ground
0V 2 - Transmit data (to Modem) 3 - Receive data (from Modem) 4
- Not connected 5 - MUTE (to Modem) Carrier Detect connected
to ground (Green). Baud Rate Generzation Three fundamental baud
rates are supported, these are derived from a 614KHz oscillator. Two fr
equencies of 1200Hz and 19.2KHz are used to support (RX/TX) 1200/1200, 300/3
00 and 1200/75 baud operation. The 8251 receive clock is always 19.
2KHz. The transmit clock can be selected from any of the two, by use of t
he 8251 /DTR output. The table below details how the baud rates are derived.
BAUD RATE RX TX /DTR CLOCK RATIO 1200 1200 0 d
16 300 300 0 64 1200 75 1 16 All th
ree available baud rates may be used in either half or full duplex mode.
It is the responsiblility of support software to control the MUTE out
put, for half duplex operation. /W/,RSX.DOC£g0N******************************
********* * * * Reproduction or transla
tion of * * any part of this documentation * * without the written per
mission of * * HoneySoft Ltd is unlawful. * *
* * An Advanced User Guide covering * * all the information
supplied here * * and more is available from * * HoneySoft Limited
. * * * * Copyright (c) 1
98Q5 HoneySoft Ltd. * * * ***************
************************ CIRKIT MODEM 1200 TO AMSTRAD CPC464/664
/128 INTERFACE RSX SPECIFICATION Command Overview j3 Several external
commands are provided for control of the RS232 link and for serial charac
ter transfer on an individual, multiple or file basis. Command Param
eters Most commands require parameters to pass information between t
hem and BASIC, the notation used to identify the type of parameters is as
follows The angled brackets indicate a parameter, parameters being
separated by commas. The name within the brackets is the name of the
parameter. For example parameter1. The square brackets indicate that a
parameter is optional and may be omitted. For example optional. Wher
e an integer variable must be used, the parameter is suffixed by a % sy
mbol. For example Lchar%. Where the address of a variable must be passed, a
n symbol is used before the parameter. For example char%. The variable m
ust have been assigned a dummy value, otherwise BASIC will flag an 'im
proper argument' error. Variables preceeded by an symbol are used to
return information back to BASIC. Parameters may be integer re
al constants, unless otherwise indicated by use of the % or symbols. S
tring Variables Two methods of passing)2.,RSX.DOC£6G4T% the string par
ameters for string or filename are possible, depending on the version of Lo
comotive BASIC you are using. If you have a CPC464 then you have BASIC
1.0, if you have a CPC664 or CPC6128 then you have BASIC 1.1. For BASIC
1.0 the parameter string or filename should be the address of a string, as
given by the symbol , for example a$"this is a string for BASIC 1.0 and
1.1" WRITE, a$ For BASIC 1.1 either the above method may be used, or the
string may be given as a constant in the external command WRITE, "this is a
string for BASIC 1.1 only" Command Summary All the external commands av
ailable to BASIC programs are summarised here. Full descriptions of each
command are 2 given in the next section. Note that the bar symbol '' used
as the first character for all external commands may be obtained by pr
essing SHIFT. RS232 Control These commands are provided for ma
naging the overall operation of one of the RS232 channels. SETUP, baud ,da
tabits ,parity ,stopbits ERROR, error% TIMEOUT, time CARRIER, char% S
ingle Character Transfer These commands send and receive individual
characters. PyUT, char WRITE, char% GET, char% READ, char% Mulitple C
haracter Transfer These commands send and receive blocks of up to 255 chara
cters. NULL, nulls READ, string WRITE, string COUNT, count% File Tran
sfer These commands are provided to transfer data files or programs from eit
her tape or disc. FILETYPE, type SEND, filename RECEIVE, filename Ter
minal Emulation Configures the Amstrad for operation as a 'dumb' terminal.
TERMINAL, mode Prestel Commands There are various commands to allo
w acess to the the features of Prestel from within a BASIC program.
The commands are CLEAR DISPLAY, mode ,col1 ,col2 ,col3 PRESTEL, mo
de 0W*,RSX.DOC£L1R ,col1 ,col2 ,col3 LOADPAGE, filename SAVEPAGE, filename
Loading the Commands There are two files on side A of the cassette,
the first USER.BIN holds the code for the user software to control the i
nterface. TheB second file PRES.BIN contains all the Prestel spec
ific commands. Each file may be used independently, but there are some re
strictions to bear in mind. The PRESTEL code has been assembled to run at
05000h and should therefore be 6 loaded only at this address. To run this
code the following command sequence should be used MEMORY &4FFF ENT
ER LOAD "PRES.BIN",&5000 ENTER CALL &5000 ENTER The RSXs will then be logge
d on and may be accessed directly. The codLe requires 028C0h bytes, and so t
he area above 078C0h is free for other programs. The user to user cod
e is fully relocateable, and so may be loaded anywhere in memory prov
ided that there is at least 014B0h bytes available. For example to load it i
n directly below HIMEM, the following command sequence should be used T
OPHIMEM-&14B0MEMORY TOP-1 ENTER LOAD "USER.BIN",TOP ENTER CALL TOP ENTER Th
e RSXs will then be loaded at the top of memory and logged on. NoUte that if
the code is loaded in at the same time as the PRESTEL, then it must either b
e loaded above 078C0h, or below 05000h. Command Descriptions SETUP U
se To configure the interface for RS232 operation by setting the baud
rayte, stop bits, data bits, and parity. Syntax SETUP, baud ,databits ,
parity ,stopbits Operation The command remembers the previous valu
es of parameters and these will be used if parameters are omitted. If no pr
eviou*gs parameters have been specified then the following defaults will be
assumed baud 1200/75 baud databits 7 parity 2 (e
ven) stopbits 1 Each parameter given is checked and if correct repl
aces its 2W2,RSX.DOC£D1WOnprevious value, only if all given parameters
are correct is the channel then setup. At the first error encountered the c
ommand will be aborted and the channel will not be setup. Before openi
ng the channel the command will wait foDr any previous characters to be
transmitted (all sent) using the current time out limit. If the time ou
t limit is exceeded then the command will abort with a time out error
. Errors are reported by ERROR. The baudrate chosen with baud may be se
lected from one of the following 0 1200 rx, 75 tx, full duplex 1 300 rx
, 300 tx, full duplex 2 1200 rx, 1200 tx, half duplex The integer para
meter databits selects the required number of data bits fo r each chara
cter to be sent and received. databits should be in the range 5 to 8. Th
e type of parity to be applied to transmitted, and checked on received
characters, may be set with the integer parameter parity. For transmitted
ycharacters, the extra parity bit is sent after the data bits. parity 0
, No parity 1, ODD parity 2, EVEN parity The integer
parameter stopbits specifies the number of stop bits to be sent after th
e data bits and optional parity bit. stopbits 0, 1 stop bit sent
1, 1.5 stop bits sent 2, 2 stop bits sent Examples 1 Se
tup the interface for 300/300 baud operation, using the existing defaults for
databits, parity an!d stopbits SETUP, 1 3 Setup the inter
face for use with a modem on British Telecom Gold SETUP,0,7,
2,1 Notes Full duplex - Data can be transmitted both ways, simultaneous
ly Half duplex - Data cawn only be transmitted in one direction
at a time. When half duplex is being used (1200/1200) the mute
output is set true (logic 1) when ever a character needs to be received. Th
e mute output is set false (logic 0) when a char1.,RSX.DOC££41WSacter is to b
e transmitted. ERROR Use Return the error code for the last used com
mand. Syntax ERROR, error% Operation The parameter error% should
be a previously declared intege r variable, into which the error code i
s to be returned. If the parameter error% is omitted then the command is ig
nored. Once any error has been read the error code is reset to 0. Th
e error codes and their meanings are summariseTd below. CODE INTERPR
ETATION 0 No error occurred 1 Too few parameters given 2
Too many parameters given 4 Time out occurred 5 Invalid paramet
er encountered 6 Line break received 7 Framing error detected
8 Receiver Overrun detected 9 Received parity error 11 Inva
lid baud rate specified 13 Invalid number of data bits 14 Invalid
parity specified 15 Invalid number of stop bits 16 Unable to open
file 17 Unable to close file 18 Unable to write file 19 Una
ble to read file 20 Received file checksum error Example Get the
latest error code ERROR,error% TIMEOUT Use To set the tim
e out limit. The default time out count is 1000, corresponding to 1 second
. This is ideal for most applications, however should the need arise it
can be changed with this command. Syntax TIMEOUT, time Operation
The integer parameter time specifies the time limit, in units of 1mS, afte
r which a command will give up trying to send or receive a character. time
should be in the range 0 to 65535 If time 0, then the time out his
set to zero If time 65535 (-1), then the time out is infinite Examples
1 Disable the timeout TIMEOUT,-1 2 Set the timeout
to 1 second TIMEOUT,1000 CARRIER 1),RSX.DOC£1TUse To return t
he status of the carrier detect input Syntax CARRIER, char% Operatio
n The parameter char% should be a predeclared integer variable, i
nto which the status of the carrier detect input is to be returned.w Carri
er detected char% -1 (true) Carrier fail char% 0 (false) Example Tes
t for the carrier CARRIER, char% Notes Received characters will be ign
ored unless the carrier detect input is true. PUT Use To tran
smit a single byte using the current setup and timeout count. Syntax P
UT, char Operation The parameter char is an integer byte in the range
0..255 to be output. char is taken MOD 256 to force it to be in the range
0..255. The timeout count set with the command TIMEOUT is used. Exampl
es 1 Send the character 'A' to the RS232 PUT,ASC("A") 2 Send
a carriage return PUT,13 Notes If haslf duplex operation is
in use, then the mute output will be set false (logic 0) before the ch
aracter is transmitted. WRITE Use Transmit a string or byte. Sy
ntax WRITE, string or WRITE, char% Operation Two types
of parameter may be specified, either a string string or an integer cha
r%. If a string is given, then string should be a reference to a predec
lared string variable. Characters from the string will be transmitted unt
il the end of the string is reached or until a time out occurs. The actual n
umber of characters transmitted can be obtained by using COUNT. If a inte
ger is given by using char%, then an equivalent +dPUT is performed. The curr
ent time out is used. Examples 1 Write out a string under version 1.0 (CP
C464) or 1.1 (CPC664) of Locomotive BASIC. 10 a$"send this str
ing out to the RS232" 20 WRITE,a$ 2 Output a string u2W0,RSX.DOC£2Under
version 1.1 of BASIC (CPC664) WRITE,"send this string out to the RS232"
3 Output a character WRITE,char% Notes Individual characters are sent s
imilar to PUT. GET Use To receive a single byte from the RS23
2. Syntax GET, char% Operation The parameter char% should be a
previously declared integer variable, into which the received character is
to be returned. The received character will alwaywSs be in the range 0.25
5. The timeout count set with the command TIMEOUT is used. No character
s will be received unless the carrier detect input is true. Examples 1
Receive a single byte from the RS232 GET,char% b 2 Receive a
byte GET,char% Notes If half duplex is in operation, then the mute ou
tput will be set true (logic 1) before attempting to receive a character
. Any characters received before the mute output was set will be discard
ed. Received characters will be ignored unless the carrier detect in
put is true. READ Use Receive a string or byte from the seri
al interface. Syntax READ, string orU READ, char% Ope
ration Two types of parameter may be specified, either a string st
ring or an integer char%. If a string is given, then string should be
the address of a predeclared string variable. Characters" will be read
into the string upto the predeclared length of the string, or until
a carriage return is received. The number of characters successfully inp
ut can be obtained by using COUNT. If a integer is given by using char%W, th
en an equivalent GET is performed. The current time out is used. Examples
1 Input a string under version 1.0 (CPC464) or 1.1 (CPC664)
of Locomotive BASIC 10 a$"replace this with received data" 20 READ,a$ 2 In
put ap.23,RSX.DOC£2V character READ,char% Notes The terminating carriage
return is not stored as part of a string. Individual characters are reciev
ed similar to GET. NULL Use Transmit an integer number S of AS
CII NULL (00H) characters. Syntax NULL, nulls Operation The intege
r parameter nulls in the range 0..255 specifies the number of ASCII NULL
characters (00H) to be transmitted. The parameter nulls is truncated
MOXD 256, a value of 0 will prevent any nulls from being sent. The com
mand will wait for any remaining characters to be sent, before sending the
nulls. The command may abort if the time out limit is reached whilst wai
ting for characters to be transmitted. The number of nulls succe
ssfully sent can be determined by using COUNT. Examples 1 Send 10 nulls
to the RS232 NULL,10 2 Send 255 nulls NULL,255 Notes Null characters are
sent in the same manner -as PUT. COUNT Use Obtain the number
of characters transferred by the last NULL, READ, WRITE, SEND, or RECEIV
E command. Syntax COUNT, count% Operation The parameter counDt% s
hould be a predeclared integer variable into which the count will be returne
d. The count may be in the range 0 to 65535. The count is reset to 0 whe
n read. If an error occurred during the operation of either NULL
, READd, WRITE, SEND, or RECEIVE then the count returned will give the n
umber of characters sucessfully transferred before the error. Example
1 Get the count for the last command COUNT,count% o FILETYP
E Use To set the type of file transfer to be used by SEND and RECEIVE.
Syntax FILETYPE, type Operation The integer parameter type may take
one of three values 0 ASCII file 1 ASCII file using ARQ prk1+,RSX.DOC£G2
WSjotocol 2 ASCII file using XON/ XOFF The default type is 0, or ASCII I
f the file type is set to ASCII, then the file to be transferred will be
treated as an ASCII text file, terminated by the ASCII end of fil
e character e CTRLZ, 01AH. The transmitter will respond to XON/XOF
F, but no handshaking is activated on the receiver. The ASCII file using X
ON/XOFF, utilises this type of handshaking for both the receiver and the tra
nsmitter and so may be used f'or file transfer between the interface and
a database such as Telecom Gold. The ARQ filetype uses a special
transfer protocol that transmits the data in blocks. Each block is th
en checked for errors, and if one is detyected then the receiver asks fo
r the block to be retransmitted. This overcomes the problems with erro
rs that are often introduced when transferring data via a modem due to
the low reliabilty of public telephone lines. This filetypeF is therefore
provided for data transfer between two CIRKIT interfaces. Examples
1 Set file type to ASCII FILETYPE,0 2 Set the file type to ARQ protocol
FILETYPE,1 SEND Use U Send a file for receiving by RECEIVE.
The type of file sent is determined by FILETYPE. Syntax SEND, filename
Operation The string parameter filename is the name of the file to be sen
t and should be a reference to a predeclared string variable. The file r
eferenced by filename is opened using the current filing system (i.e. eithe
r tape or disc) and sent out as an ASCII or ARQ file according to the file
type set with FILETYPE. The number of characters succesRbsfully sent befo
re any error can be obtained by using COUNT. The current time-out count is
used. Examples 1 Send a file under version 1.0 or 1.1 of BASIC to the RS2
32 a$"test" SEND,a$ 2 Send a file under &1,,RSX.D
OC £1WVversion 1.1 of BASIC. SEND,"test" Notes Individual
characters are sent in the same manner as PUT. The time out should be
as long as possible to prevent the transfer from aborting due to long
delays while accesSsing the tape or disc. For ARQ file transfer, the in
terface must be set up for 8 data bits with no parity. RECEIVE Use
Receive a file sent by SEND or equivalent. The type of file to
receive is determined by FILETYPE. Syntax RECEIVE, filename Operation
The string parameter filename is the name of the file to be received a
nd should be a reference to a predeclared string variable. The file refer
enced by filename is opened using the current filing system (i.e. either ta
pe or disc) and received characters are stored in it. If the file was sent
using ARQ then a checksum is used to determine if errors have been receiv
ed in the file. At the end of transmission or on the occurrence of any error
the file is closed. The number of characters successfully stored before a
ny error can be obtained by using COUNT. Examples 1 Receive a file under
version 1.0 or 1.1 of BASIC ' from the RS232 a$"test"
RECEIVE,a$ 2 Receive a file under version 1.1 of BASIC. RECEIV
E,"test" Notes Individual characters are received in the same manner as
GET. The time out should be as long M as possible to prevent the tran
sfer from aborting due to long delays while accessing the tape or disc.
For ARQ file transfer, the interface must be set up for 8 data bits with
no parity. TERaMINAL Use To convert the Amstrad into a 'dumb
terminal' for use with another computer or modem. Syntax TERMINAL, mode
Operation There are various terminal configuration modes to
choose from, these are selecte20,RSX.DOC£4WVd by the integer paramete
r mode. Four bits within mode select options to configure operation.
The bits used are Bit 0 0, ECHO No local echo of characters typed at
the Amstrad keyboard. Bit 0 1, NO ECHO Characters ty2ped at the Amstr
ad keyboard are locally echoed to the screen. Bit 1 0, MONITOR OFF C
ontrol codes below ASCII 20H behave as expected. Bit 1 1, MONITOR ON Control
codes below ASCII 20H are displayed as graphics symbols. The symbo
ls may be redefined as necessary before entering terminal mode. Bit 2 0,
NO Auto Line Feed Received carriage returns are treated normally. Bit 2 1,
Enable Auto Line Feed A line feed is displayed locally after a carriage re
tu-rn is received. Bit 3 0, OBEY ALL control codes All control codes re
ceived will be sent to the screen. Bit 3 1, OBEY only selected control co
des This prevents spuriously received characters from changing screen
mode, ink colours and other desirable effects. The codes obeyed are
06H, 07H, 08H, 09H, 0AH, 0BH, 0CH, 0DH, 10H, 1EH The screen is not cleare
d, the cursor is turned on and enabled. There is no timeout, the command f
inishes when a key on the A%mstrad giving the character code ASCII 0FCH is
pressed. This is normally given by CTRL ESC. Examples 1 Terminal with
no echo TERMINAL,0 2 Terminal with echo & auto line feed TERMINAL,5 Notes
Characters with received parity er(Orors are displayed on screen by an up
side down question mark character, ASCII 0AEH. If half duplex mode is
in operation, the mute output will only be be set false (logic 0) when a
character is to be transmitted. CLEAR Use To clear the Prestel fr
ame buffer to spaces. Syntax CLEAR Operation No parameters are re
quired. If any parameters are given, the command is ignored. The
memory used to hold the l5W1,RSX.DOC£5Zlast received page from Prestel i
s cleared to spaces, erasing its contents. Notes This command is inde
pendent of the Prestel screen modes. DISPLAY Use To redisplay the
current Prestel page in either screen mode. Syntax DISPLAY, mode ,co
l1 ,col2 ,col3 Operation If no parameters are given the page is redisp
layed in Prestel mode 0. The parameter mode should be either 0 or 1.
For mode 0 the in"k colours are set up accordingly. For mode 1, up to
three optional colours may be specified in addition to the black backgroun
d. If no optional colours are specified the current settings are used.
Examples 1 Redisplay the page in mode 0 DISPLAY 2 Redisplay
the page in mode 1 DISPLAY,1,2,6,18 Notes The recommended colours fo
r Mode 1 are 2, 6 and 18. The previous ink colours, nor the screen
mode, are restored after the page has been displayed. Ink colours specif
ied for mode 0 are ignored. For mode 1 the ink colours are stippled to a
chieve the effect of more than three colours. PRESTEL Use To en
ter the main Prestel "&terminal in one of two screen modes. Syntax PREST
EL, mode ,col1 ,col2 ,col3 Operation If no parameters are given the p
age is redisplayed in Prestel mode 0. The parameter mode should be eithe
r 0 or 1. For PErestel mode 0 the ink colours are set up accordingly.
For mode 1, up to three optional colours may be specified in addition to
the black background. If no optional colours are specified the curre
nt settings are used. The COPYt£ key is used as a reveal toggle. If
the command SETUP cannot be found, because the user RSX code has not been l
oaded, then the interface will be set up for 7 data bits, 1200/75 baud, even
parity. Otherwise the settings from SETUP wil.75,RSX.DOC £o4Vl be used.
Examples Prestel mode 0 PRESTEL Prestel mode 1 PRESTEL, 1,2,6,18 N
otes The ink colours and screen mode are restored to their values prior
to the PRESTEL command. The recommended colours for Mode 1 are 2, 6 and
18. Ink colours specified for mode 0 are ignored. For mode 1 the ink c
olours are stippled to achieve the effect of more than three colours.
Prestel mode is exited when a key returning ASCII 0FCH is pressed, this
is normally given by CTRL ESC. LOADPAGE Use To reload a Prestel p
age saved with SAVEPAGE. Syntax LOADPAGE, filename Operation The
parameter filename should be a reference to a string var&iable, set to the
name of the file. Data is read from the file using the currently active
filing system, either TAPE or AMSDOS and will overwrite any existing page.
The page can be redisplayed with DISPLAY. Examples 1 Load the f
ile "page1" a$"page1" LOADPAGE, a$ 2 Load a page under BASIC 1.1
LOADPAGE, "page1" Notes The file is loaded using the current fi
ling system, either TAPE or AMSDOS. SANVEPAGE Use To save the conte
nts of the Prestel frame buffer to a data file. Syntax SAVEPAGE, filena
me Operation The parameter filename should be a reference to a string
variable, set to the name of the file. Data is wr2itten to the file using
the currently active filing system, either TAPE or AMSDOS. Examples 1
Save the page to the file called "page1" a$"page1" SAVEPAGE,a$
2 Save the page under BASIC 1.1 SAVEPAGE, "PAGE1" Notes T
he file is saved in BINARY format. If AMSDOS is in use then the file will
have a .BIN extension added to it if none is specified. VTous droits réservés. Reproduction sans autorisation interdite. © Kukulcan