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FabiaTech Corporation

55

DMA Channel Map

The equivalents of two 8237A DMA controllers are implemented in the FX5612
board. Each controller is a four-channel DMA device that will generate the

memory addresses and control signals necessary to transfer information directly

between a peripheral device and memory. This allows high speeding information
transfer with less CPU intervention. The two DMA controllers are internally

cascaded to provide four DMA channels for transfers to 8-bit peripherals (DMA1)

and three channels for transfers to 16-bit peripherals (DMA2). DMA2 channel 0
provides the cascade interconnection between the two DMA devices, thereby

maintaining IBM PC/AT compatibility.

The following is the system information of DMA channels:

DMA Controller 1

DMA Controller 2

Channel 0: Spare

Channel 4: Cascade for

controller 1

Channel 1: Reserved for
IBM SDLC

Channel 5: Spare

Channel 2: Diskette

adapter

Channel 6: Spare

Channel 3: Spare

Channel 7: Spare

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Содержание FX5612

Страница 1: ...FabiaTech Corporation IPC Solution Website http www fabiatech com Email support fabiatech com Small Cube System Fanless Series FX5612 User s Manual JUNE 2007 Version 1 6 Part Number FX5612 ...

Страница 2: ...nishing performance or use of this document Trademarks Trademarks brand names and products names mentioned in this publication are used for identification purpose only and are the properties of their respective owners Technical Support If you have problems or difficulties in using the system or setting up the relevant devices and software that are not explained in this manual please contact our se...

Страница 3: ...IMM Socket For DDR Modules 10 LED Indicators On the Front Panel 10 Connecting the Monitor Keyboard and Mouse 11 Connecting the COM ports and Parallel Port 11 Connecting the L1 L2 LAN ports and USB Ports 12 Connecting the Audio Microphone In Speak Out 13 Reset Push Button 13 Connecting the DC Power and Power Button 13 Chapter 3 BIOS Setup 15 Overview 15 BIOS Functions 16 Keyboard Convention 17 STAN...

Страница 4: ... Watchdog Timer 42 Watchdog Timer Setting 43 Watchdog Timer Enabled 44 Watchdog Timer Trigger 44 Watchdog Timer Disabled 45 Chapter 5 Technical Reference 47 Trouble Shooting for Post Beep and Error Messages 47 Technical Reference 50 Physical and Environmental 50 Real Time Clock and Non Volatile RAM 50 CMOS RAM Map 52 I O Port Address Map 53 Interrupt Request Lines IRQ 54 DMA Channel Map 55 DMA Con...

Страница 5: ...v ...

Страница 6: ... M Processor Able to support 600MHz 1 4GHz CPUs this system supports two 10 100 1000M Base TX LAN ports 256MB SDRAM on board mini PCI socket for wireless LAN Four USB2 0 ports and a VGA controller Each FX5612 has one port for I O communications Two RS 232C ports are available The FX5612 is perfect for ATM machines KIOSK point of sales point of information gaming and infotainment measurement techno...

Страница 7: ...Intel Pentium M 1 4GHz 1 184 Pin DIMM Max 256MB 1GB 512MB 1GB Chipset 855GME ICH4 CRT VGA Yes Watchdog Timer Yes Multi I O Two Serial and One Parallel Enhanced IDE or CF One USB 2 0 Four Audio Line Out And MIC In RJ45 WAN port 100 1000Mbps Two Mini PCI Socket One Dimensions Unit mm 178 D x 249 W X 72 H ...

Страница 8: ...FabiaTech Corporation 3 Layout POWER HDD LAN1 LAN2 DC12 24V 1 2 KB PRT COM1 MOUSE VGA COM2 Antenna LAN LINE OUT USB MIC POWER BUTTON RESET HDD CF FX5612 ...

Страница 9: ...s V2 0 One Audio Line Out and Microphone Input One Mini PCI Socket for Wireless LAN module One DC In plug connector with power switch One Push button reset switch One power LED One HDD CF access LED and Six status LED s Storage Bay One Compact Flash slot with plug in aperture and cover One 2 5 hard disk space Power requirement FX5612 12 24V DC 27VA minimum with 2 5 HDD and 19V input Voltage FX5612...

Страница 10: ...ed from us please make sure the specification of the cable s is compatible with the FX5612 system Note after you install the FX5612 it is recommended that you keep the diskette or CD that contains drivers and document files and keep the document copies or unused cables in the carton for future use The following lists the accessories that may be included in your FX5612 package Some accessories are ...

Страница 11: ...wing descriptions 1 Before removing the cover shut down the operation System and disconnect power switch to off and unplug AC to DC Adapter cable 2 Install or unplug any connector Compact Flash and hard disk be sure that the power is disconnected or power switch to off from the system If not this may damage the system 3 The ESD Electricity Static Discharge may be created from human body that touch...

Страница 12: ...to the IDE and stop when you feel resistance Installing Ejecting 2 5 HDD If you are installing hardware option you can remove the back cover The following figure will guide you how to install 2 5 HDD inside the FX5612 and how to install the FX5612 fixers Installing HDD The following figure will guide you install fix support HDD and to inside the FX5612 HDD ...

Страница 13: ...d 1 2 Factory Preset Open Close Slave 1 2 Master or slave drives select for Compact Flash Note Unscrew the screws when installing Compact Flash module The Compact Flash socket on the FX5612 supports 3 3V Compact Flash and Micro Drives The Jumper is used to select master slave device of this socket Be sure to avoid the same master slave setting with which connects to IDE connector if you use CF and...

Страница 14: ...ure and push ahead to eject the hard disk with guiders Installing Mini PCI Card Mini PCI Socket for WLAN Modules You may extend additional mini PCI WLAN module to FX5612 by removing the bottom cover Connect the antenna cable from backside antenna hole to Mini PCI WLAN the auxiliary board Release the screws on the bottom of the unit Please see the spots circled ...

Страница 15: ...re and rear pictures The DIMM socket supports 128MB to 1GB of DDR RAM modules LED Indicators On the Front Panel The Power and HDD LED s has two distinctive status Off for inactive operation and blinking light for activity And the 2 LED s for LAN ports The LAN1 and LAN2 LED s Green indicate on line access status of LAN1 and LAN2 respectively POWER HDD LAN1 LAN2 ...

Страница 16: ...PS 2 mouse Standard PS 2 keyboard and Mouse can be plugged into this connector without any adapter cable Connecting the COM ports and Parallel Port The DB9 COM1 2 is standard serials port connector The following tables show the signal connections of these connectors COM DB 9 RS 232 Signal 1 DCD 6 DSR 2 RXD 7 RTS 3 TXD 8 CTS 4 DTR 9 RI 5 Ground Case Case Ground KB Mouse Description 1 2 Keyboard Mou...

Страница 17: ...device can be attached to USB ports with plug and play supported The left side port is USB 1 2 and the right side port is USB 3 4 DB 25 Description DB 25 Description 1 STROBE 14 AUTO FORM FEED 2 DATA 0 15 ERROR 3 DATA 1 16 INITIALIZE 4 DATA 2 17 PRINTER SELECT IN 5 DATA 3 18 Ground 6 DATA 4 19 Ground 7 DATA 5 20 Ground 8 DATA 6 21 Ground 9 DATA 7 22 Ground 10 ACKNOWLEDGE 23 Ground 11 BUSY 24 Groun...

Страница 18: ...12 and restart system booting Connecting the DC Power and Power Button Power is supplied through an external AC DC power adapter or power DC In Check the technical specification section for information about AC DC power input voltage See following figure and a side pictures 1 DC Power Jack Use External AC DC power adapter DC12 24V Line Out Mic In FX5612 DC 10 24V 48VA minimum FX5612A 10 24V 60VA m...

Страница 19: ...nal block DC12 24V 3 Power Button Pushing the Power button once will switch the FX5612 on and off depending on system BIOS Power Management Setup or OS setting Pushing the power button while in the on mode for more than 4 seconds will turn the FX5612 system off Power button On Off ...

Страница 20: ...led firmware that interacts directly with the hardware components and facilitates interaction between the system hardware and the operating system The BIOS default values ensure that the system will function at its normal capability In the worst situation the user may have corrupted the original settings set by the manufacturer All the changes you make will be saved in the system RAM and will not ...

Страница 21: ...assword 10 Load Optimized Default to auto configure the system according to optimal setting with pre defined values This is also the factory default setting of the system when you receive the board 11 Load Fail Safe Default to configure the system in fail safe mode with predefined values 12 Save Settings and Exit perform this function when you change the setting and exit the BIOS Setup program 13 ...

Страница 22: ...m Function ESC To exit the current menu or message Page Up Page Down To select a parameter F1 To display the help menu if you do not know the purpose or function of the item you are going to configure F6 Fail Safe Default F7 Optimized Default F10 Save and exit UP Down Arrow Keys To go upward or downward to the desired item ...

Страница 23: ...and year format Highlight the Time field and then press the Page Up Page Down or keys to set the current date Follow the hour minute and second format The user can bypass the date and time prompts by creating an AUTOEXEC BAT file For information on how to create this file please refer to the MS DOS manual Hard Disk Setup The BIOS supports various types for user settings The BIOS supports Pri Maste...

Страница 24: ... as secondary the selection of the video type is Monochrome Mode Error Halt This option determines whether the computer will stop if an error is detected during power up No errors The system boot will not be stopped for any error that may be detected All errors Whenever the BIOS detect a non fatal error the system will be stopped and you will be prompted All But Keyboard The system boot will not s...

Страница 25: ...The BIOS determines how much extended memory is present during the POST This is the amount of memory located above 1MB in the CPU s memory address map Total Memory System total memory is the sum of basic memory extended memory and other memory ...

Страница 26: ...irus Warning This option may flash on the screen During and after the system boots up any attempt to write to the boot sector or partition table of the hard disk drive will halt the system and the following error message will appear in the mean time you can run an anti virus program to locate the problem Available Options Disabled Enabled Default setting Disable CPU L1 L2 Cache This functions spee...

Страница 27: ...ck status This field is used to activate the Num Lock function upon system boot If the setting is on after a boot the Num Lock light is lit and user can use the number key Available options On Off Default setting On Typematic rate Setting This function specifies the keystroke repeat rate when a key is pressed and held down Available options Disable Enable Default setting Disable Typematic Rate Cha...

Страница 28: ... appears every time and the BIOS Setup Program executes and the computer is turned on If Setup is chosen the password prompt appears if the BIOS executed Available options Setup Always Default setting Setup Report No FDD for Win95 This option allows Windows 95 to share IRQ6 assigned to a floppy disk drive with other peripherals in case the driver does not exist Available options Enable Disable Def...

Страница 29: ...cies If the installed SDRAM supports SPD function select SPD If not you can select based on other access time of the SDRAM Available Options By SPD Manual Default setting By SPD CAS Latency Time This field specifies the latency for the Synchronous DRAM system memory signals Available Options 2 5 2 Default setting 2 5 Active to Precharge Delay This field specifies control the number of DRAM for an ...

Страница 30: ...X Low GFX High core frequency DRAM Date integrity mode Available Options AUTO Max 266Mhz 400 266 133 200Mhz 400 200 100 200Mhz 400 200 100 133Mhz 400 266 133 267Mhz 400 333 166 250Mhz Auto Max 400 300Mhz Default setting Auto Max 400 300Mhz System BIOS Cacheable This field specifies selecting enabled allows caching of the system BIOS ROM at F0000H FFFFFH resulting in better system performance Howev...

Страница 31: ...led Enabled Default setting Enabled AGP Aperture Size MB This field specifies the system memory size that can be used by the Accelerated Graphics Port AGP Available Options 4MB 8MB 16MB 32MB 64MB 128MB and 256MB Default setting 64 MB On Chip Frame Buffer Size This field specifies which VGA display memory You can select either Video memory on the VGA There are setting share onboard memory Available...

Страница 32: ... section describes the function of peripheral features OnChip IDE Device OnChip Primary Secondary PCI IDE This field specifies the IDE channel that can be applied when using IDE hard disk connector Available Options Disabled Enable Default setting Enable ...

Страница 33: ... modes numbered from 0 to 4 which primarily differ in timing When Auto is selected the BIOS will select the best available mode IDE Primary Secondary Master Slave UMDA Ultra DMA 33 implementation is possible only if your IDE hard drive supports it and the operating environment includes a DMA driver Windows 95 OSR2 or a third party IDE bus master driver If you hard drive and your system software bo...

Страница 34: ...eld specifies the internal Audio Control Available Options Disable Enable Default setting Enable Init Display First This field specifies which VGA display will be used when the system is boot You can select either the onboard AGP or the VGA card installed on the PCI bus Available Options Onboard AGP PCI Slot Default setting Onboard AGP Onboard LAN Boot ROM This field specifies the PXE boot ROM of ...

Страница 35: ...ting Auto OnBoard Serial Port 1 These fields select the I O port address for each Serial port Available Options Disabled 3F8H IRQ4 2F8H IRQ3 and 3E8H IRQ4 2E8H IRQ3 Default setting 3F8 IRQ4 OnBoard Serial Port 2 These fields select the I O port address for each Serial port Available Options Disabled 3F8H IRQ4 2F8H IRQ3 and 3E8H IRQ4 2E8H IRQ3 Default setting 2F8 COM2 ...

Страница 36: ...ere to the IEEE P1284 specifications Available Options Normal SPP EPP ECP and ECP EPP Default setting SPP EPP Mode Select This field specifies the EPP version for the Parallel Port Mode specification used in the system and is not configurable IF Normal or ECP is selected this field displays N A meaning not available Available Options EPP1 7 and EPP1 9 Default setting EPP1 9 ECP Mode Use DMA This o...

Страница 37: ...led to activate the chipset Power Management and APM Advanced Power Management features Available Options User Define Min Saving Max Saving Default setting User Define Video Of Method When enabled this feature allows the VGA adapter to operate in a power saving mode V H SYNC Blank This selection will cause the system to turn off the vertical and horizontal synchronization ports and write blanks to...

Страница 38: ... time of system inactivity all devices except the CPU will be shut off Available Options Disabled 1 Minute 2 Minute 4 Minute 12 Minute 20 Minute 30 Minute 40 Minute and 1 Hour Default setting Disabled Soft Off By PWR BTTN Pressing the power button for more than 4 seconds forces the system to enter the Soft Off state when the system has hung The choices are Delay 4 Sec and Instant Off Available Opt...

Страница 39: ...FabiaTech Corporation 34 Time hh mm ss Alarm This field specifies the hour minute second of the RTC alarm Available Options 1 24 0 60 0 60 Default setting 00 ...

Страница 40: ...he system reconfiguration has caused such a serious conflict that the operation operating system cannot boot Available Options Enable Disable Default setting Disable Resources Controlled By Auto ESCD Manual If you select Auto all the interrupt request IRQ DMA assignment and Used DMA fields disappear as the BIOS automatically assigns then The default value is Manual Available Options Auto Manual De...

Страница 41: ...es operating on different buses can handle data from the CPU on each set of palette registers on every video device Bit 5 of the command register in the PCI device configuration space is the VGA Palette Snoop bit 0 is disabled Available Options Disabled Data read and written by the CPU is only directed to the PCI VGA devices palette registers Enabled Data read and written by the CPU is directed to...

Страница 42: ...age and CPU fan speed System Hardware Monitor In this field you can monitor or detect the followings items These items are view only and cannot be changed Current CPU Temp Current System Temp Current Ext Tempe CPU Fan1 Speed CPU Fan2 Speed VCORE A VCORE B 3 300V 5 0000V 12 00V 1 500V 1 350V VBAT V 5VSB V VBAT On board Battery ...

Страница 43: ...e Supervisor password is set up 4 Enter Advanced BIOS Features screen and point to the Security Option field 5 Select System or Setup System a visitor who attempts to enter BIOS or operating system will be prompted for password Setup a visitor who attempts to the operating system will be prompted for user password You can enter either User password or Supervisor password 6 Point to Save Settings a...

Страница 44: ...To install the 855GME driver insert the CD ROM into the CD ROM device and enter DRIVER SysChip 855GME Step 2 Execute Setup exe file Step 3 The screen shows the SETUP type Press any key to enter the main menu Step 4 As the setup is completed the system will generate the message as follows Yes I want to restart my computer now Installation is done No I will restart my computer later System must be r...

Страница 45: ... XP 98SE ME you can find the DISPLAYL icon located in the CONTROL PANEL group Step 6 Adjust the Refresh Rate Font size and Resolution Audio Drivers WIN 98 2000 XP Driver Step 1 To install the AUDIO driver insert the CD ROM into the CD ROM device and enter DRIVER AUDIO I815E WIN98 ME 2K XP Step 2 Execute SETUP exe file Step 3 The screen shows the SETUP type Press any key to enter the main menu Step...

Страница 46: ...ion is complete LAN Utility Driver 1 To install the LAN utility OR driver insert the CD ROM into the CD ROM device and enter DRIVER LAN RTL8110S DIAG If your system is not equipped with a CD ROM device copy the LAN driver from the CD ROM to CF 2 Execute install2KXP exe or install98se exe file Note In the RTL8110S directory a README TXT is included to provide installation information BIOS Flash Uti...

Страница 47: ...er You can use your own program to enable the watchdog timer Once you have enabled the watchdog timer the program should trigger the I O every time before the timer times out If your program fails to trigger or disable this timer before it times out e g because of a system hang up it will generate a reset signal to reset the system The time out period can be programmed to be set from 1 to 255 seco...

Страница 48: ...t After you trigger the watchdog timer it will be set to non zero value to watchdog counter and start to count down again If your program fails to trigger the watchdog timer before time out it will generate a reset pulse to reset the system The factor of the watchdog timer time out constant is approximately 1 second The period for the watchdog timer time out is between 1 to FF timer factors If you...

Страница 49: ...ogical Device 8 of watchdog timer Out dx al Mov dX 2eh Mov al 0f5h Set second as counting unit Out dx al Mov dx 2fh In al dx Or al c0 Trigger P W LED And al not c8h Set Second And al c8h Set Minute Out dx al Mov dx 2eh Mov al 0f6h Out dx al Mov dx 2fh Mov al 28h Set timeout interval as 28seconds and start counting Out dx al Exit extended function mode Mov dx 2eh Mov al 0aah Out dx al Watchdog Time...

Страница 50: ...e 8 configuration register CRF5 Bit 3 Sec Min CRF6 Bit 0 7 Count Mov al 07h Out dx al Mov dx 2fh Mov al 08h Select Logical Device 8 of watchdog timer Out dx al Mov dX 2eh Mov al 0f5h Set second as counting unit Out dx al Mov dx 2fh In al dx And al not c8h Set Second or Minute Out dx al Mov dx 2eh Mov al 0f6h Out dx al Mov dx 2fh Mov al 00h Set Watchdog Timer Disabled Out dx al Exit extended functi...

Страница 51: ...FabiaTech Corporation 46 ...

Страница 52: ...e components and connectors are in proper position and firmly attached If the errors still exist please contact with your distributor for maintenance POST BEEP Currently there are two kinds of beep codes in BIOS setup One indicates that a video error has occurred and the BIOS cannot initialize the video screen to display any additional information This beep code consists of a single long beep foll...

Страница 53: ...nd firmly attached 3 The correct hard drive type is selected in BIOS Setup ERROR INITIALIZING HARD DISK CONTROLLER When this error occurs ensure the following things 1 The cord is exactly installed in the bus 2 The correct hard drive type is selected in BIOS Setup 3 Whether all of the jumpers are set correctly in the hard drive FLOPPY DISK CONTROLLER ERROR OR NO CONTROLLER PRESENT When you cannot ...

Страница 54: ...ory fields MEMORY VERIFYING ERROR It indicates an error verifying a value is already written to memory Use the location along with your system s memory map to locate the bad chip OFFENDING ADDRESS MISSING This message is used in connection with the I O CHANNEL CHECK and RAM PARITY ERROR messages when the segment that has caused the problem cannot be isolated REBOOT ERROR When this error occurs tha...

Страница 55: ...tment that maintains the date and time in addition to storing configuration information about the computer system It contains 14 bytes of clock and control registers and 114 bytes of general purpose RAM Because of the use of CMOS technology it consumes very little power and can be maintained for long periods of time using an internal Lithium battery The contents of each byte in the CMOS RAM are li...

Страница 56: ...type byte drive C 12 Fixed disk type byte drive D 13 Reserved 14 Equipment byte 15 Low base memory byte 16 High base memory byte 17 Low expansion memory byte 18 High expansion memory byte 19 2D Reserved 2E 2F 2 byte CMOS checksum 30 Low actual expansion memory byte 31 High actual expansion memory byte 32 Date century byte 33 Information flags set during power on 34 7F Reserved for system BIOS ...

Страница 57: ...sabled 1 Enabled 15h Base Memory in 1KB increments Low Byte 16h Base Memory in 1KB increments High Byte 17h IBM compatible memory in 1KB increments Low Byte 18h IBM compatible memory in 1KB increments High Byte max 15 MB 19h 2Dh Vaires 2Eh Standard CMOS RAM checksum high byte 2Fh Standard CMOS RAM checksum low byte 30h IBM compatible Extended Memory Low Byte POST in KB 31h IBM compatible Extended ...

Страница 58: ...1 040h 05Fh Timer 060h 06Fh Keyboard Controller 070h 071h Real Time Clock NMI 078h 07Bh TTL I O 080h 09Fh DMA Page Register 0A0h 0BFh Interrupt Controller 2 0C0h 0DFh DMA Controller 2 0F0h Clear Math Coprocessor Busy Signal 0F1h Reset Math Coprocessor 1F0h 1F7h IDE Interface 2E8h 2EFh Serial Port 4 COM4 2F8h 2FFh Serial Port 2 COM2 2B0 2DF Graphics adapter Controller 378h 3FFh Parallel Port 1 LPT1...

Страница 59: ...rvice required The following table shows the IRQ used by the devices on the Industrial CPU Card Level Function IRQ0 System Timer Output IRQ1 Keyboard IRQ2 Interrupt Cascade IRQ3 Serial Port 2 IRQ4 Serial Port 1 IRQ5 USB 1 IRQ6 Floppy Disk Controller IRQ7 Parallel Port 1 IRQ8 Real Time Clock IRQ9 USB 2 IRQ10 LAN 1 IRQ11 LAN 2 Audio IRQ12 PS2 Mouse IRQ13 FPU IRQ14 Primary IDE IRQ15 Secondary IDE ...

Страница 60: ...ervention The two DMA controllers are internally cascaded to provide four DMA channels for transfers to 8 bit peripherals DMA1 and three channels for transfers to 16 bit peripherals DMA2 DMA2 channel 0 provides the cascade interconnection between the two DMA devices thereby maintaining IBM PC AT compatibility The following is the system information of DMA channels DMA Controller 1 DMA Controller 2...

Страница 61: ...n the ACE a completed MODEM control capability and a processor interrupt system that may be software tailored to the computing time required to handle the communications link The following table is a summary of each ACE accessible register DLAB Port Address Register Receiver buffer read 0 Base 0 Transmitter holding register write 0 Base 1 Interrupt enable X Base 2 Interrupt identification read onl...

Страница 62: ...errupt Identification Register IIR Bit 0 0 if Interrupt Pending Bit 1 Interrupt ID Bit 0 Bit 2 Interrupt ID Bit 1 Bit 3 Must be 0 Bit 4 Must be 0 Bit 5 Must be 0 Bit 6 Must be 0 Bit 7 Must be 0 Line Control Register LCR Bit 0 Word Length Select Bit 0 WLS0 Bit 1 Word Length Select Bit 1 WLS1 WLS1 WLS0 Word Length 0 0 5 Bits 0 1 6 Bits 1 0 7 Bits 1 1 8 Bits Bit 2 Number of Stop Bit STB Bit 3 Parity ...

Страница 63: ... 6 Must be 0 Bit 7 Must be 0 Line Status Register LSR Bit 0 Data Ready DR Bit 1 Overrun Error OR Bit 2 Parity Error PE Bit 3 Framing Error FE Bit 4 Break Interrupt BI Bit 5 Transmitter Holding Register Empty THRE Bit 6 Transmitter Shift Register Empty TSRE Bit 7 Must be 0 MODEM Status Register MSR Bit 0 Delta Clear to Send DCTS Bit 1 Delta Data Set Ready DDSR Bit 2 Training Edge Ring Indicator TER...

Страница 64: ...ivisor Latch LS MS LS MS Bit 0 Bit 0 Bit 8 Bit 1 Bit 1 Bit 9 Bit 2 Bit 2 Bit 10 Bit 3 Bit 3 Bit 11 Bit 4 Bit 4 Bit 12 Bit 5 Bit 5 Bit 13 Bit 6 Bit 6 Bit 14 Bit 7 Bit 7 Bit 15 Desired Baud Rate Divisor Used to Generate 16x Clock 300 384 600 192 1200 96 1800 64 2400 48 3600 32 4800 24 9600 12 14400 8 19200 6 28800 4 38400 3 57600 2 115200 1 ...

Страница 65: ...attachment of various devices that accept eight bits of parallel data at standard TTL level Data Swapper The system microprocessor can read the contents of the printer s Data Latch through the Data Swapper by reading the Data Swapper address Printer Status Buffer The system microprocessor can read the printer status by reading the address of the Printer Status Buffer The bit definitions are descri...

Страница 66: ...ccept another Normally this signal will be active for approximately 5 microseconds before receiving a BUSY message stops Bit 5 A 1 means the printer has detected the end of the paper Bit 4 A 1 means the printer is selected Bit 3 A 0 means the printer has encountered an error condition Printer Control Latch Printer Control Swapper The system microprocessor can read the contents of the printer contr...

Страница 67: ... 1 in this position allows an interrupt to occur when ACK changes from low state to high state Bit 3 A 1 in this bit position selects the printer Bit 2 A 0 starts the printer 50 microseconds pulse minimum Bit 1 A 1 causes the printer to line feed after a line is printed Bit 0 A 0 5 microsecond minimum highly active pulse clocks data into the printer Valid data must be present for a minimum of 0 5 ...

Страница 68: ...FabiaTech Corporation 63 Appendix Dimension 249 174 72 4 5 1 2 ...

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