PTM-7230C - Elhvb.com
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1. You have now finished configuring and connecting the mainboard Operation The main advantage of the PTM 1230C 12MHz zero wait mini 80286 Turbo mainboard over ordinary PC AT mainboards is its dual clock system This innovation makes it possible for your computer to operate at either of two clock speeds 8MHz or 12MHz In the 12MHz Turbo mode your computer will operate up to 195 faster than a conventional 80286 based computer Another special feature of the PTM 1230C mainboard is the zero wait one wait option in the Turbo mode In zero wait your system will be around 195 faster than a IBM PC AT computer In one wait state operation will be around 80 faster Mode DRAM used Test Value 8 MHz 1 wait em MHz 8 MHz 0 wait 10 3 MHz 12 MHz 1 wait 12 MHz Testing by Landmark Speed Test Program To select the Normal Turbo and one wait zero wait options refer to the following instructions 19 Obtaining 12MHz Turbo mode This mainboard supports both a software switch and a hardware switch for changes between Normal and Turbo modes Setting default operation mode The Turbo hardware switch jumper J5 shown on page 4 gives you the choice of running the PTM 1230C in either Normal or Turbo mode when the power is on For default operation In Normal mode Place a jumper cap over J5 In Turbo mode Take the jumper cap off J5 Software switch Before using the software switch pay attention to whethe2. sor Use of VTI s PC AT compatible chip set Switchable between 8MHz Normal mode and 12MHz Turbo mode by either a software switch or a hardware switch 8MHz UO operation to keep compatibility with all existing add on cards 8MHz Normal mode compatible with IBM PC AT and 12MHz Turbo mode 195 faster than IBM PC AT Two serial ports and one parallel port onboard Onboard battery backup for CMOS configuration table and real time clock RAM subsystem of 512KB 640KB or 1 MB RAM configurations of 640 384KB Eight expansion slots Sixteen level interrupt Three channel timer for music and time Seven channel DMA for disk and special I O 32KB legal DTK BIOS ADL certified developed by DATATECH ENTERPRISES CO LTD Four layer motherboard Speed test by Landmark Speed Test Program for one wait state 12MHz for zero wait state 15 9MHz Board layout The illustration below will familiarize you with the layout of the PTM 1230C motherboard and its onboard ports Expansion Slots Serial Port 2 CN Serial Port 1 CN2 Parallel Port CN3 Installation During the course of this section references will be made to jumper settings used to configure the various functions of the PTM 1230C mainboard The following diagram shows the locations of all the jumpers that may need to be set Jo J10 Jii Location of jumpers 4 RAM ins talla tion Two jumpers J8and J9 are used to configure RAM size on t
3. AA batteries instead of the circular lithium battery next to J12 to the CMOS RAM For its location refer to the illustrations on page 4 The battery connector pin assignments are as follows Ground Not used Not used 6 VDC 17 Keyboard connector Having fastened the mothervoard to the case it only remains to attach the keyboard The keyboard connector is located at the back of your system unit Refer to the illustration below Location of keyboard connector from back panel The pin assignments for keyboard connector J20 are as follows Keyboard clock Keyboard data Spare Ground 5 VDC You have now finished configuring and connecting the mainboard Battery connector Finally there is battery connector J12 This is for connecting four size AA batteries instead of the circular lithium battery next to J12 to the CMOS RAM For its location refer to the illustrations on page 4 The battery connector pin assignments are as follows em Ivo Ground Not used Not used 6 VDC 17 Keyboard connector Having fastened the mothervoard to the case it only remains to attach the keyboard The keyboard connector is located at the back of your system unit Refer to the illustration below Location of keyboard connector from back panel The pin assignments for keyboard connector J20 are as follows Keyboard clock Keyboard data Spare Ground 5 VDC
4. Spare Ch 2 Diskette Ch 6 Spare Ch 3 Spare Ch 7 Spare DMA channels Channels 0 through 3 are contained in DMA control ler 1 Transfers of 8 bit data 8 bit O adapters and 8 bit or 16 bit system memory are supported by these channels Each of these channels will transfer data in 64KB blocks throughout the 16 megabyte system address space Channels 4 through 7 are contained in DMA controller 2 To cascade channels 0 through 3 to the microproces sor use channel 4 Transfers of 16 bit data between 16 bit adapters and 16 bit system memory are supported by channels 5 6 and 7 DMA channels 5 through 7 will transfer data in 128KB blocks throughout the 16 megabyte system address space These channels will not transfer data on odd byte boundaries 28 The addresses for the page register are as follows Page Register VO Hex Address DMA channel 0 DMA channel 1 DMA channel 2 DMA channel 3 DMA channel 5 DMA channel 6 DMA channel 7 Refresh Address generation for the DMA channels is as follows For DMA channels 3 through 0 Source DMA Page Registers 8237A 5 Address A23 alo A154 ao NOTE To generate the addressing signal byte high enable BHE invert address line AO For DMA channels 7 throuah 5 Source DMA Page Registers 8237A 5 Address a23 4 a17 aeea NOTE The BHE and AO addressing signals are forced to a logic 0 DMA channel addresses do not increase
5. on in the Turbo mode and turn off in the Normal mode The cursor will always have the same ap pearance 21 Alternate use of both switches Both the hardware and the software switches may be used alternatively but this is not advised because you may become confused about the mode of operation When using both switches alternatively the Turbo LED will be the only accurate indicator of the actual mode the LED will be on in Turbo mode and off in Normal mode Turbo LED and hardware switch Most 80286 type computer cases do not have a Turbo LED or a Turbo hardware switch However both of these items are very useful as you probably can already see Therefore it is highly recommended that you install both in your system if you do not already have them For more information refer to Panel indicators and switches section One wait zero wait option The one wait zero wait option is selected by jumper J6 on the mainboard Be aware that this option is only available when the computer is in the Turbo mode For information on how to set the jumper refer to 0 ne wait zero wait states in the installation section 22 Technical information Microprocessor The 80286 is a high performance microprocessor with a 16 bit external data path up to 16 megabytes of directly addressable physical memory and up to one gigabyte of virtual memory space The operating speed of the 80286 chip is 8MHz in Normal mode and 12MHz in Turbo mode The 80
6. or decrease through page boundaries 64KB for channels 0 through 3 and 128KB for channels 5 through 7 29 VO channel slots The I O channel supports Refresh of system memory from channel microproces sors Selection of data accesses either 8 bit or 16 bit Interrupts 24 bit memory addresses 16MB O wait state generation WO address space hex 100 to hex 3FF Open bus structure allowing multiple microprocessors to share the system s resources including memory DMA channels Numbering of the UO slots is as follows J1 J8 I O channels GND W OCHCK RESET DRV SD7 Sbo 1 0 CHRDY KA Sen ep ep e e e NWAVUIDAI0 YV PPP gt gt gt FP gt yp gt Py gt r gt gt r gt Z or NNNMNNNMNHNHANNMW WM nony 30 J10 J14 and J16 UO channels MEM CS16 1 0 CS16 O mm em SS ONG D A a DE ER EE E E DE E GER LL crtststewefsytfsfstf fy ff 000 Math coprocessor The math coprocessor functions as an I O device through I O port addresses hex OF8 OFA and OFC The microprocessor sends OP codes and operands to UO ports The microprocessor also receives and stores results through the same UO ports The busy signal sent by the coprocessor forces the microprocessor to wait until the coprocessor is finished executing The following describes the math coprocessor controls OFO The latched math coprocessor busy signal can be cleared with an 8 bit Out command to port FO The coprocessor
7. that the power to the system is turned OFF before changing any hardware settings such as DIP switches or jumpers Note 1 When you see an error message appears on the screen after turning the power on leave the system switched on for one or two hours to recharge the battery You can then enter the system configuration 2 Leave your system switched on for 10 to 15 hours to completely recharge the battery 3 If you had left the system switched off for more than one month follow step 2 above Contents IMrOducHon sense 1 SE 2 Board Jayolt a u seen ein 3 INStANALON KE 4 Location of jUMPOMS 5 44 00 4 RAM installation eninin 5 ROM installation cccccccssssssccceeeeessssseeeeeeeeeesssssaneeees 6 Serial Parallel port settings cee eee 7 Display adapter settings 0 0 ee eee eee 8 One wait zero wait states ueeeeeennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 8 Panel indicators and switches nennen 9 Math coprocessor installation rser0reeeneenennnn 13 Power supply connector eee ee cece eee teeeeee 14 Battery connector rn 17 Keyboard connector nnrernnnnnnnnnnnnennnnnnnnnnnnnnnnnn 18 e king 19 Obtaining 12MHz Turbo mode ou 20 Setting default operation mode seere 20 SoftWare SWIN asien E AA 20 Hardware switch 21 Alternate use of both awitches een 22 Turbo LED and hardware switch een 22 One wait zero wait option 22 Technical inform
8. will latch busy if it asserts its error signal Data output should be zero 0 F1 The math coprocessor will reset if an 8 bit Out command is sent to port F1 Again the data output should be zero 31 Application note The default operation mode depends on two things the hardware switch jumper setting as well as the type of key board controller 8042 used The relationship between them is described in the table below Default mode Hardware switch Type of 8042 jumper setting Mitsubishi Version AMI Shor Cen 32
9. 286 operates in two modes protected virtual address and real address Virtual address mode The virtual address mode provides a I gigabyte virtual address space mapped onto a 16 megabyte physical ad dress space Virtual address space is larger than physical address space and the use of a virtual address that does not map to a physical address location will cause a restartable interrupt This mode uses 32 bit pointers that consist of a 16 bit selector and offset components The selector specifies an index into a memory resident table and the 24 bit base address of the desired segment is obtained from the memory table A 16 bit offset is added to the segment base address to form the physical address The micropro cessor automatically references the tables whenever a segment register is loaded with a selector Instructions that load a segment register will refer to the memory based tables without additional program support The memory based tables contain 8 byte values called de scriptors 23 Real address mode In this mode physical memory is a contiguous array of up to 1 megabyte The selector portion of the pointer is interpreted as the upper 16 bits of a 20 bit address and the remaining 4 bits are set to zero This mode of opera tion is compatible with the 8088 and the 8086 Segments in this mode are 64KB in size and may be read written or executed An interrupt may occur if data operands or instructions attempt to wrap aro
10. PTM 7230C 12MHz Zero Wait Mini286 Mainboard User Manual H Edition 1 05 1988 Datatech Enterprises Co Ltd This manual and the Mini286 mainboard are copyrighted with all rights reserved Under the copyright laws neither this manual nor the Mini286 mainboard may be copied in whole or in part without the express written consent of Datatech Enterprises Co Ltd The following does not apply to any country where such provisions are inconsistent with local law Datatech makes no warranties with respect to this documentation ei ther express or implied and provides it as is This includes but is not limited to any implied warranties of merchantibility and fitness for a par ticular purpose The information in this document is subject to change without notice Datatech assumes no responsibility for any errors that may appear in this document IBM and IBM PC AT are registered trademarks of International Business Machines Corp VTI is a registered trademark of VLSI Technology Inc Intel is a registered trademark of Intel Corp Landmark and Landmark Speed Test are registered trademarks of Landmark Software The typeface used in the text of this manual is 12 point Helvetica and is used under licence from the Allied Corporation the owner of the typeface Warning Reconfiguring To ensure the reliability of the computer N EVER reconfigure the board while the power is ON If you wish to reconfigure the board at any time ensure
11. ables indicate the proper settings of these jumpers Parallel port CN3 jumper settings cnalvisluia ms irrelevant irrelevant Serial port 1 CN2 jumper settings CN2 J15 J16 COM3 fopen open disable open short disable short open Serial port 2 CN1 jumper settings CN1 J17 J18 COM2 short short COM4 open open disable open short Display adapter settings Jumper J11is used to select the display adapter To find jumper J110n the motherboard refer to the illustra tion on page 4 To configure the motherboard for the kind of display adapter you want set jumper J11 according to the table below Jumper setting J11 o OF open J11 OO short Primary display attached to monochrome display Primary display attached to color graphics monitor adapter One wait zero wait states Jumper J6 is used to select the zero wait and one wait states To find the jumper refer to the illustration on page 4 The appropriate settings are shown below Jumper setting One wait state operation OO Sg Zero wait state operation sech Panel indicators and switches How you attach the mainboard to the case of your system unit is largely up to you This is because the PTM 1230C Turbo mainboard can be used in a variety of 80286 type system unit cases Under typical conditions your system unit will have all the indicators and switches shown below and preferably
12. ation nen 23 31 MiIGrOPrOCESSOMS u Bau 23 System REH 25 Systeri JOE Ups fice enee Sein Deeg See Deg Se tes 26 ROM amp RAM subsystems 0 cee eee eeeeeeeee 27 Direct memory ACCESS eee eee eee eee eee rari 28 VO channel slots ueeeaaaaaanenenenennnnnnnnnnnnnnnnnnnnnnnnnnnnnn 30 Math coprocessor urnernennennnennnennnnnnnnnnnnnnnnnn nenn 31 Application note 32 Introduction The PTM 1230C motherboard is compatible with the PC AT This means that virtually all the software that is available for the PC AT can also be run on a system you build around the PTM 1230C motherboard Moreover the same keyboard commands used on a PC AT can also be used on the PTM 1230C motherboard For example the same lt Ctrl gt lt Alt gt lt Del gt combination of keystrokes that is used for the software reset on the PC AT may also be used on your PTM 1230C based system For this reason the PTM 1230C motherboard is the ideal choice for a person seeking affordable AT style power The clear well illustrated instructions in this manual ensure that even if you are a newcomer to the computer world you will have your system installed and running with the minimum of effort Note Besure the jumper JP1is shorted when you install your system Otherewise you have to set up your system configuration whenever you turn on your computer Features e e e e e o H e 802864 2 microprocessor optional 80287 coproces
13. ch one to choose 13 Power supply The final step is attaching the power supply cable to the mainboard at connector J21 Looking from the top of the case on the left side of the power supply are some cables Find the 12 pin plastic connector the four pin connectors are for the disk drives and hard disks Refer to the picture below Pins 1 and 12 are numbered in the picture for your convenience The pinout description is on the next page 14 Assignments Power good 5 VDC 12 VDC 12 VDC Ground Ground Ground Ground 5VDC 5 VDC 5 VDC 5 VDC 15 Choosing a power supply The power supply provides a power good signal to indicate proper operation of the power supply The power good signal is a TTL compatible high level for normal op eration or a low level for fault conditions If the power good signal works well then the system will function properly Otherwise the data setting in CMOS RAM will be lost The following list gives you some guidelines for choosing the right power supply The power good signal should have a turn on delay of at least 200ms but no longer than 500ms when the power is on This means that the power good signal goes to a high level later than 5V The power good signal goes to a low level at least 100ms before 5V falls below the regulation limits when the power is off Battery connector Finally there is battery connector J12 This is for connecting four size
14. even a reset switch a Turbo hardware switch and a Turbo LED If not you can either install a new panel display or omit some of these items from your system Your computer dealer offers an accessory which allows you to add the two switches and the LED to your system The cables leading from this control panel will be con nected to the appropriate pin connectors on the main board Before you attach the mainboard to the case you should connect these cables to the mainboard The loca tions on the mainboard are given in the diagrams on the following pages i The pinouts for the keylock pin connector J1 are given in the following table Refer to it to connect the keylock cable to the pin connector LED power Not used Ground Keyboard in hibit Ground Note that pin 2 is not used and therefore the corre sponding socket in the cable connector has no wire lead The wire for pin 1 can thus easily be identified and the cable connector oriented correctly Functions of panel indicators and switches Now that you have connected the panel indicators and switches you should understand something about their functions Keylock The keylock is used to enable or disable the keyboard By disabling the keyboard the user ensures that anyone who does not have a key will be unable to use the computer Unlocking the keylock enables the keyboard The keylock connector is located at J1as previously noted Power LED The power LED indica
15. he motherboard The two RAM banks can be made to contain from 512KB 640KB and up to 1 MB by means of setting jumpers J8 and J9 For the location of J8 and J9 refer to the illustration on page 4 To select the proper settings of the jumpers for the RAM size that you want refer to the table below _ RAM address RAM type pe Short Shor 512 0 000000 07FFFF 256Kx18 Short Open 640 0 000000 09FFFF 256K x 18 64K x 18 Open Short 640 384 990099 92EEEF 256K x 18 256K x 18 Notallowed Open Ope 512 0 stands for 512KB base OKB expansion memory ROM installation To install the ROM chips refer to the illustration below for the location of the chip sockets and the ROM selection jumper J22 on the motherboard a a KE ees BER I ga Be ae PS s es Pa EE BE ELGG For selection and installation of the ROM BIOS chips refer to the table below Type of Type of Sg BIOS ROM chip ROM configuration J22 U58 Low byte Other BIOS of 32KB size 2 128X2 uez High byte en DTK BIOS U58 Low byte or any other 27256 x 2 ur of 64KB size Eo eee EI Serial Parallel port settings There are two serial ports and one parallel port on the PTM 1230C motherboard Before actually using these ports you should set the jumpers J13 J14 J15 J16 J17 J18 and J19 correctly Refer to the illustrations on pages 3 amp 4 to find the port connectors and these jumpers The following t
16. oftware redirected to NT OAH IRQ 2 Reserved Reserved Reserved Coprocessor Fixed disk controller Reserved RQ3 Serial port 2 RQ 4 Serial port IRQ 5 Parallel port 2 IRQ 6 Diskette controller IRQ 7 Parallel port 1 26 ROM subsystem The ROM subsystem has a 32K by 16 bit arrangement consisting of two 32K by 8 bit ROM EPROM modules The odd and even address codes reside in separate modules The top of the first megabyte and the bottom of the last megabyte address space is assigned to ROM hex 0F0000 and hex FFOOOO Parity checking is not done on ROM DTK BIOS has been supported and placed in this subsystem RAM subsystem The RAM subsystem starts at address hex 000000 of the 16M address space It consists of either 640KB or 1 MB of 256K or 64K by I bit RAM modules Memory refresh forces one memory cycle every 15 microseconds through channel 1 of the timer counter The following functions are performed by the RAM initialization program e Write operation to any memory location e Initialize channel 1 of the timer counter to the rate generation mode 15 microseconds NOTE The memory can be used only after being accessed or refreshed eight times 27 Direct memory access Eight DMA channels are supported by the system Two Intel 8237 5 DMA controller chips four channels in each chip are used DMA channels are assigned as follows CTLR 1 CTLR 2 Ch 0 Spare Ch 4 Cascade for CTRL Ch 1 SDLC Ch 5
17. r default operation is in Normal or Turbo mode If it is in Normal mode do the following press and hold down the control lt Ctrl gt and alternate lt Alt gt keys on the key board while you press the minus lt gt key The cursor on the screen will turn into a box The Turbo LED on your panel if you have installed one will light For more information on the Turbo LED refer to the Panel indicators and switches section Now the computer is in Turbo mode To return to Normal mode press the same keys you used to enter Turbo mode When you enter Normal mode the cursor will return to the dash _ form and the Turbo LED will turn off 20 If default operation is in Turbo mode press and hold down the control lt Ctrl gt and alternate lt Alt gt keys on the keyboard while you press the minus lt gt key to go to Normal mode The Turbo LED will turn off and the cursor will turn into a box To return to Turbo mode press the same keys the Turbo LED will light and the cursor will change into a dash Hardware switch H you have a hardware switch on your panel connect it to jumper J5 More information on this is given in the Panel indicators and switches section Push the hardware switch on to enter Normal mode and push it off to enter Turbo mode zz _ e Hardware switch off Hardware switch on Using the hardware switch means that the only indica tion of the mode your computer is in will be the Turbo LED It will turn
18. tes whether the power is on 10 Hardware reset The reset switch restarts the com puter from the RAM test stage If you encounter any problems while using unfamiliar software you can al ways restart from the beginning by pressing the restart button The reset connector is jumper J2 Turbo LED The Turbo LED indicates operation in Turbo mode The Turbo LED connector is jumper J4 Turbo switch The Turbo switch changes operation mode between Turbo and Normal The Turbo switch connector is jumper J5 Speaker The speaker connector is located at J3 The pinouts for the various switch and indicator connectors are given on the following page 11 12 Turbo LED jumper J4 pinouts Function Select pin Ground Data out 5 VDC Ground 5 VDC Select pin Ground Math coprocessor ins talla tion The math coprocessor located at U45 is optional When a 80287 coprocessor is installed the BIOS will check its presence automatically Setting any switch to indicate its presence is unnecessary But choosing a proper 80287 for correct operation is necessary For Turbo mode an 80287 8 8MHz is required For Normal mode an 80287 6 6MHz is required PUT LUT EISE mm mmm ma mm mmm mm mm If you install a coprocessor be certain that it is the correct one for the clock speed in which you intend to do your processing Consult the vendor from whom you purchase the chip if you are in doubt as to whi
19. und the end of a segment In this mode the information contained in the segment does not use the full 64KB and the unused end of the segment may be overlayed by another segment to reduce physical memory requirements 24 System timers The system has three programmable timer counters controlled by an Intel 8254 2 timer counter chip These are channels 0 through 2 defined as follows Channel 0 System Timer GATE 0 Tied on CLK IN 0 1 190MHz OSC CLK OUT 0 8259A IRQ 0 Channel 1 Refresh Request Generator GATE 1 Tied on CLK IN 1 1 190MHz OSC CLK OUT 1 Request Refresh Cycle NOTE Channel 1 is programmed to generate a 15 microsecond period signal Channel 2 Tone Generation for Speaker GATE 2 Controlled by bit 0 of port hex 61 PPI bit CLK IN 2 1 190MHz OSC CLK OUT 2 Used to drive the speaker The 8254 2 timer counter is treated by system pro grams as an arrangement of four programmable external UO ports Three are treated as counters the fourth is a control register for mode programming 23 System interrupts Sixteen levels of system interrupts are provided by the 80286 NMI and two 8259A Interrupt Controller chips The following shows the interrupt level assignments in de creasing priority Level Function Microprocessor NMI Parity or 1 0 channel check Interrupt controllers CTLR 1 CTLR2 IRQ 0 Timer output0 IRQ 1 Keyboard Output buffer full H Interrupt from CTLR 2 Realtime clock interrupt S
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