PC go! 1995 September

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Text File | 1994-11-26 | 15.8 KB | 331 lines

^m╒══════════════════════╤═══════════════════════════╡^t Communications setup ^m╞╕ │ ^nDevice name ^m│ ^nDevice Port Baud Com Address Irq Vector ^m│ ├──────────────────────┼───────────────────────────────────────────────────┤ │^r Async Modem COM1 ^m│ ^h8250A/16450 1 19200 8N1 $03F8 04 0C ^m│ │^b■^hAsync Modem COM2 ^m│ ^h16550A FIFO 2 19200 8N1 $02F8 03 0B ^m│ │ ^hAsync Modem COM3 ^m│ ^hNo UART 3 19200 8N1 $03E8 04 0C ^m│ │ ^hAsync Modem COM4 ^m│ ^hNo UART 4 19200 8N1 $02E8 03 0B ^m│ │ ^hInterrupt 14h ^m│ ^hInterrupt 14h 1 9600 8N1 ^m│ │ ^hISDN ^m│ ^hFossil 1 64000 8N1 ^m│ │ ^hFossil ^m│ ^hFossil 1 38400 8N1 ^m│ │ ^h ^m│ ^h ^m│ │ ^h ^m│ ^h ^m│ │ ^h ^m│ ^h ^m│ ├──────────────────────┼───────────────────────────────────────────────────┤ │ ^nConfigure comports ^m│ ^nAsync Professional ^m│ │ ^nCheck IRQ ^m│ ^n■ = Default device ^m│ │ ^nSet default values ^m│ ^m│ │ ^nAuto installation ^m│ ^m│ ╘══════════════════════╧═══════════════════════════════════════════════════╛^n ^hMaximum baud rates^n Since setting up the serial port is one of the most important things in any terminal program, you must remember the following rules: Maximum bps rates: 4.77 MHz PC (8088) 9600 bps 8 MHz PC (8088) 19200 bps 8 MHz PC (286) 57600 bps 16 MHz PC (386) 115200 bps ^hWhen to use a fast 16550A serialchip with FIFO buffer^n You need 16550A serial UART chips if you want to have error free connections when using: an 8 MHz PC (8088); any kind of multitasker - eg: OS/2, Windows, DESQview, etc; a modem connected to a network drive. It does not matter how fast your machine is, my 486DX2-66 still gives me errors when there is no FIFO buffer in the machine. And this happends with baud rates even at 38400. If you have problems, set the speed to 19200 and see if that works. The 16550A UART chip gives you a small 16 byte FIFO buffer - which means the chip does not have to generate an interrupt every time a character arrives. Most PC's are delivered with the old 8250 or 16450 chips (almost the same), so if you get CRC errors, you should buy such a card. (Ask us or one of our Registration Sites where to obtain them.) All good internal high speed modems already have a 16550A UART implemented. When buying an internal modem make sure it has one! ^hDevice setup^n ^m╒════════════════════════════════════╤═════════════════════╡^t Device setup ^m╞╕ │^r Serial interface ^m│ ^hUART/Serial ^m│ │ ^nComport ^m│ ^h1 ^m│ │ ^nDevice name ^m│ ^hAsync Modem COM1 ^m│ │ ^nBaudrate ^m│ ^h19200 ^m│ │ ^nLock port ^m│ ^hYes ^m│ │ ^nDatabits / Stopbits / Parity ^m│ ^h8,1,N ^m│ │ ^nPhonebook ^m│ ^hTERMINAT^n.FON ^m│ │ ^nCostfile ^m│ ^hTERMINAT.CST ^m│ │ ^nReceive buffer size ^m│ ^h2048 ^m│ │ ^nTransmit buffer size ^m│ ^h4096 ^m│ │ ^nSoftware flow control (Xon/Xoff) ^m│ ^hOff ^m│ │ ^nHardware flow control (CTS/RTS) ^m│ ^hOn ^m│ │ ^nHardware flow control (DSR/DTR) ^m│ ^hOff ^m│ │ ^nUse 16550 fifo if available ^m│ ^h14 ^m│ │ ^nKeep 16550 fifo on in shell ^m│ ^hNo ^m│ │ ^nRTS low while writing ^m│ ^hNo ^m│ │ ^nAuto RTS low trigger ^m│ ^h2 ^m│ │ ^nCarrier detect mask ^m│ ^h128 ^m│ │ ^nInit string ^m│ ^hATZ^M ^m│ │ ^nRestore port on close ^m│ ^hNo ^m│ │ ^nClose port in shell ^m│ ^hNo ^m│ ╘════════════════════════════════════╧═════════════════════════════════════╛^n ^hSerial interface^n Terminate supports 4 different interfaces. ^hUART/Serial ^nDirect serial chips ^hInterrupt 14h ^nVia BIOS int 14h max 9600 baud ^hFossil ^nResident serial devices, like X00/BNU or ISDN fossil devices. ^hDigiboard ^nVery fast intelligent multiport adapter. ^hComport^n Select which port to assign for this device, COM1..COM8 can be selected. ^hDevice name^n Enter the string to be shown everywhere the device is shown. You should enter your modem name here, 'Spirit II 19200 8N1' or whatever you have. ^hBaudrate^n Which baudrate to use for this device as default. Note that if you want to use a special baudrate that is not shown in the list, just press D and define it. ^hLock port^n When using a high speed modem (bps>=9600) you should always choose to lock the port. ^hDatabits / Stopbits / Parity^n ^hDatabits^n A data byte can contain 5,6,7 or 8 bits. The vast majority of applications will use either 7 or 8 bits since most of the data we are used to dealing with is expressed in 8-bit bytes (although text data can often be expressed in only 7-bits). Many time-sharing systems, such as CompuServe, work with only 7 data bits because that's all they need to display text data. When transfering binary data though, for example with a file transfer protocol, you usually switch to 8 data bits. If you use 8N1 and 7E1 on different systems, you must define 2 different devices and select the correct device in the phonebook. Create 2 devices which looks the same. They could be called: Device 1:^hMODEM COM2 2400 8N1^n Device 2:^hMODEM COM2 2400 7E1^n ^hStopbits^n Stop bits follow the data bits in the serial stream. The value for stop bits will always be either 1 or 2. Generally, 1 stop bit is used. ^hParity^n Parity describes a bit checking scheme. When used, all of the bits in a data byte are added together. A final bit, called the parity bit, is added such that the sum of all bits will be either odd or even (whichever you specify). The transmitter calculates and transmits a parity bit. If it is correct then it is assumed that the characters were received without error. If not, then it is assumed that there was some sort of error during transmission. Possible choices are determined by the remote system: ^hNone ^nNo parity is added, default ^hEven ^nA parity bit is added such that the bit sum is always even ^hOdd ^nA parity bit is added such that the bit sum is always odd ^hMark ^nA parity bit of value one is always added ^hSpace ^nA parity bit of value zero is always added ^hPhonebook^n When this device is selected, then use this phonebook. This will only work when starting up Terminate. ^hCostfile^n Which costfile to use when using this device. ^hReceive buffer size^n ^hTransmit buffer size^n Size of internal buffers used by Terminate. Only used with an interface that is buffered, otherwise these buffers are ignored. Only the UART/Serial interface is buffered. Do NOT change these values unless you are absolutely sure that you know what you are doing! ^hSoftware flow control (Xon/Xoff)^n This option controls the automatic software flow control. (Receive flow control - where Terminate tells the remote to stop transmitting characters, and Transmit flow control - where Terminate responds to the remote's request to stop transmitting characters as its input buffer fills. Whenever the input buffer is more than 75% full, an Xoff (#19) character is sent to the remote. It is up to the remote to recognize the Xoff (#19) and cease sending data. When the input buffer empties again to below 75% of buffer size, Terminate will send an Xon (#17) character to the remote. It is then up to the remote to recognize this character and resume sending data.) ^hHardware flow control (CTS/RTS)^n Hardware flow control is always preferred when available, because it is faster and much safer. Hardware flow control works with lowering and raising the modem lines. First you need to setup your modem to work with CTS/RTS hardware flow control. CTS means Clear-To-Send and when using hardware flow control the CTS line must be high (with the CTS light in modem lit) before anything will be sent to the modem. When the receive buffer is more than 90% full the RTS (Request-To-Send) line will be set low telling the modem not to send again until the buffer is less than 90% full. ^hHardware flow control (DSR/DTR)^n Some strange modems need DSR (Data-Set-Ready) instead of CTS and DTR (Data-Terminal-Ready) or both options together, but it is not advised to ever use this option unless you are sure you know what you are doing. Data-Set-Ready is sometime refered as Modem-Ready (MR) on your modem. ^hUse 16550 fifo if available^n Tests whether a 16550A is available in the serial chip and, if it is, uses its' FIFO buffer. Windows cannot use this by default. ^hKeep 16550 fifo on in shell^n When calling an external program or exiting Terminate, we normally disable the FIFO buffer. Some utilities cannot detect the 16550A chip or do not support the FIFO. The best thing is to disable (No) and let external utilities detect for themselves. ^hRTS low while writing^n If you do not have a 16550A chip and have problems with errors, you can try to set RTS low while writing. This means Terminate will stop receiving while writing protocol blocks to the disk. This will slow down performance a little, but is safer and could prevent hangups. ^hAuto RTS low trigger^n If you get more than X errors then the Auto RTS low function can be set to go into progress, a good way of keeping up performance to a maximum and only turn on RTS low when really needed. ^hCarrier detect mask^n When checking the modem status register this determines which bit should be used for checking carrier detect. Normally bit 7 (128) is used and you should only change this if you really know what you are doing. ^hInit string^n Select which init string you want to sent to the modem after changing device and before dialing. This string is also sent to modem at startup if it is the current device. ^hRestore port on close^n After Terminate closes the port you can choose to restore the port as it was before. But this means that you will get hung up if Terminal ready was low at startup and you call any external program. You should only turn this on if you really know what you are doing. ^hClose port in shell^n Normally there is no reason for closing the ports while shelling to DOS. But some external protocols might need this. Closing the port will save you a little in swap space, but if you are using fossil/ISDN you might get hung up if you close the port. ^hConfigure comports^n ^m╒═══════╡^t Configure comports ^m╞╕ │^n Address Irq Vector ^m│ ├──────┬──────────────────────┤ │ ^nCOM1 ^m│ ^h$03F8 04 0C ^m│ │^r COM2 ^m│ ^h$02F8 03 0B ^m│ │ ^nCOM3 ^m│ ^h$03E8 04 0C ^m│ │ ^nCOM4 ^m│ ^h$02E8 03 0B ^m│ │ ^nCOM5 ^m│ ^h$4220 03 0B ^m│ │ ^nCOM6 ^m│ ^h$4228 03 0B ^m│ │ ^nCOM7 ^m│ ^h$5220 03 0B ^m│ │ ^nCOM8 ^m│ ^h$5228 03 0B ^m│ ╘══════╧══════════════════════╛^n When using the UART/Serial interface, you can change the actual port IO address, the hardware IRQ and the software interrupt. You should not need to change anything here, but if you do, you must beware of potential hardware conflicts. Do not try to change the IRQ on your internal modems or serial card without knowing exactly what you are doing. If you have an internal modem and 2 external comports, you should always choose COM1 for the mouse and COM4 for the modem. If you choose COM3 you will conflict with IRQ4. Do not try changing the hardware jumpers/ switches without help and a manual for the modem. Before you change anything on the modem, always make a note of the current jumper settings so you always can go back. If your internal modem is capable of using IRQ 5 or 7, please be aware that the modem could conflict with other hardware, like netcards or SoundBlaster cards. If it does not work at once with the internal modem, please seek professional help. It is your hardware supplier that is responsible for ensuring the modem works. Terminate uses only standard calls, so if the default settings do not work, contact your hardware supplier. Please always remember to turn off the power before doing anything. The vector number is where to install the software interrupt, this number should always be IRQ + 8. IRQ>7 = IRQ+$68 IRQ0 , Vector $08 ( 8) Timer IRQ1 , Vector $09 ( 9) Keyboard IRQ2 , Vector $0A (10) Screen IRQ3 , Vector $0B (11) COM2,COM4 IRQ4 , Vector $0C (12) COM1,COM3 IRQ5 , Vector $0D (13) Free IRQ6 , Vector $0E (14) Floppy IRQ7 , Vector $0F (15) Free IRQ8 , Vector $70 (112) IRQ9 , Vector $71 (113) IRQ10, Vector $72 (114) IRQ11, Vector $73 (115) IRQ12, Vector $74 (116) IRQ13, Vector $75 (117) IRQ14, Vector $76 (118) IRQ15, Vector $77 (119) These are the defaults for normal machines. If you have an internal modem that is capable of using IRQ 5 or 7, you should consider this. If you try to use IRQ0, IRQ1 orIRQ6 you could get in serious trouble and your machine could hang. ^hCheck IRQ^n ^m╒══════════════════════════════════════════════╡^t Check IRQ ^m╞╕ │ ^nFound COM1, $03F8, testing...uses IRQ 4 ^m│ │ ^nFound COM2, $02F8, testing...uses IRQ 3 ^m│ │ ^nFound COM3, $03E8, testing...uses IRQ 4 ^m│ │ ^nFound COM4, $02E8, testing...uses IRQ 5 ^m│ │ ^nNo chip COM5, $4220 ^m│ │ ^nNo chip COM6, $4228 ^m│ │ ^nNo chip COM7, $5220 ^m│ │ ^nNo chip COM8, $5228 ^m│ │ ^m│ ╘═══════════════════════════════════════════════════════════╛^n This function tries to determine which hardware IRQ the comports are using. Even if this routine fails to find the IRQ, it will work anyway, if you specify the correct IRQ. Not all machines will show the correct IRQ. ^hSet default values^n Set all devices to the default parameters. If you make some kind of mistake and cannot remember what you did wrong, you could use this function. ^hAuto installation^n Detect IRQ's on ports and finds on which port your modem is connected. Test for maximum baudrate on device and select initstrings.