I I PT68K-2 I

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PT68K-2

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PERIPHERAL TECHNOLOGY

1480 Terrell Mill Rd., Suite 870

Marietta, Georgia 30067 USA

P T S S K - 2

U S E R ' S MANUAL

C o p y r i g h t 1 9 8 7 , 1 9 8 8

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Per~pher~~ Tech~o~ogy

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Power Connection . . RS-232 Terminal

Monochrome monitor connection Color monitor connection

Floppy disk connection . Speaker connection . LED connection

Reset switch .

RS-232 cable construction Printer connection .

Winchester drives Configuration options Specifications .

Parts list . . Parts placement Schematics . . .

• 1

· 1

• • • • • 2

• • • • • • • 2

• 2

· . 3

· 3

• 3

· 4

• 5

· 6

· 7

· 8

· . 9

• . 11

· . 12

GETTING STARTED

These instructions assume that you have completed construction of the kit or have purchased an assembled board. Instructions for construction of the ki t are contained in a separate manual.

POWER CONNECTION

Connect power to the PT68K-2 board. The power connector is 310.

NO CONNECTION

POWER CONNECTION INDEX PIN

+12V -12V GND GND GND GND -5V +5V +5V +5V

MONITOR CONNECTION

These types of monitors may be connected to the PT68K-2:

• RS-232 terminal (Connector J22).

• IBM PC/XT compatible keyboard, monochrome adaptor card and monochrome monitor.

• IBM PC/XT compatible keyboard, color adaptor card and color monitor.

R S - 2 3 2 TERMINAL CONNECTION

Connect a cable between 322 and the CRT. See the page 4, "RS-232 Interface" for more information. J22 is the MAIN terminal port.

311,312 or 321 can be used for other terminals or serial printer ports. The use of J11,312 and 321 is determined by the operating system. When using this type of terminal it is necessary to

PT68K-2 3une 1,1988 Page 1

press the <CR> key a few times when turning on the, system. This allows the HUMBUG moni tor to determine the baud rate of your terminal. The terminal should be configured for eight data bits, one stop bit, no parity and a baud rate between 300 and 19,200.

MONOCHROME MONITOR CONNECTION

1. Install an IBM compatible monochrome adaptor card in one of the IBM compatible I/O slots.

2. Plug a monochrome monitor into the monochrome display adaptor card.

3. Plug an IBM PC/XT/AT compatible keyboard into the keyboard connector port J9. The keyboard must be set to XT mode if it has an XT/AT switch position.

4. The HUMBUG monitor initializes the adaptor card on power up and displays a message. See the HUMBUG moni tor manual for more information on monitor selection.

COLOR GR.APHICS ( e G A ) CONNECTION

1. Install a color graphics adaptor (CGA) card in one of the PC/XT I/O slots.

2. Plug a color monitor into the color graphics adaptor card.

3. Plug an PC/XT or AT compatible keyboard into the keyboard connector port 39. The keyboard must be set to XT mode if i t has an XT/AT switch position.

The HUMBUG monitor initializes the adaptor card on power up and displays a message. See the HUMBUG monitor manual for

information on monitor selection.

FLOPPY D I S K CONNECTION

The PT68K2 computer will work wi th ei ther 3-1/2" or 5-1/4"

drives. Storage capacities are 360K for the 40 track drives and 720K for the 80 track drives. The PT68K2 will not work with the 1.2 MEG or 1.44 MEG drives that are sometimes used wi th IBM AT/clone computers. The drive cable used for the PT68K2 has all connections in parallel and does not twist part of the cable like IBM clone drive cables. Be certain not to use an IBM/clone drive cable.

1. Connect a cable between 313 and the floppy drive(s). Make sure that pin 1 on 313 connects to pin 1 on the floppy drive(s). (Pin 1 is near the power connector).

2. If you have two drives, there should be only one resistor terminator pack installed. The resistor terminator should be installed on the last drive in the system (the one at the far end of the cable). Some of the newer drives like the Toshiba drives (3-1/2 and 5-1/4 inch drives) do not contain any terminating resistors and this step will not apply if you have a newer drive(s).

SPEAKER CONNECTION

Plug the speaker into J18. The speaker wires should be on the outer terminals. Connection of the speaker is optional; however, no bell will be available when using the PC/XT keyboard and monitor unless the speaker is connected. The speaker also beeps on power up after successful completion of system tests.

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MONITOR LED CONNECTION

On the baby AT cabinet there is a panel of three LED's with wires attached. The appropriate wire should be plugged in the appropriate pins on the PT68K2 system board.

315 Power

316 - Disk access (WD1002A-HDO controller) 317 - Halt status

Connect the Turbo mode LED to 317. Note the HALT LED will light for a second when turning the computer on or when pressing the reset switch.

There are no polarization indicators on the LED plugs so it may be necessary to reverse the connector if the LED's do not light.

Note: The LED ^I s will not be damaged if the plug is installed incorrectly.

RESET SWITCH CONNECTION Plug the connector from the reset switch to J23.

SYSTEM STARTUP

Refer to the HUMBUG manual for information on starting the system.

PT68K-2 3une 1,1988 Page 3

R S - 2 3 2 INTERFACE INFORMATION

Connectors 311,312,321,322 PIN DESCRIPTION

1 Request to Send (RTS) 1 o 0 6

2 Index 2 o 5

3 Ground 3 o 0 4

4 Data Terminal Ready (DTR)

5 Transmitted Data (Viewed from component side)

6 Received Data

( -Fo )

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TYPICAL CRT TO COMPUTER CONNECTION

PIN J11,J12,321 OR J22 DB-25 PIN

6 0 0 2

5 0 0 3

3 0 0 7

4 0 0 20

Note: DTR·must be connected for the RS-232 interface to work.

RTS is not usually required unless interfacing to a modem.

(DTR should be connected to +12V if no DTR is available from the terminal)

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PRINTER INTERFACE

There are two ways to interface a printer to the PT68K2 computer.

One option is to connect a printer to the PIA port (38) on the PT68K2 computer. The other method is to connect a printer to the printer port of a monochrome or color card.

P I A Pr.:1.n.ter P o r t

The PIA port (38) is arranged to allow IOC connectors to connect between 38 and the printer connector. To conctruct a cable use 20 conductor cable and follow the diagram below.

1

40

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STR I PE ON CABLE 20 CONDUCTOR IDC CABLE

20 PINS OF CONNECTOR ARE NOT USED

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17 PINS NOT CONNECTED

CENTRONICS TYPE PRINTER CONNECTOR

40 PIN FEMALE IDC CONNECTOR

40 Pin IDC Connector

1

37

The cable should be posi tioned so that the striped end of the cable starts on pin one of the IDC connector. The last 20 pins are not used.

37 Pin Printer Connector

The cable should be posltlond on the connector with the striped end of cable starting on pin 1 of the printer connector.

MONO/COLOR Pri~ter P o r t

If using the printer port of the monochrome or color adaptor card you will need an IBM compatible printer cable. These cables are available from Peripheral Technology as well as other IBM clone computer dealers. The adaptor card uses a male OB-25 connector wi th a centronics 37 pin male connector on the printer end.

PT68K-2 June 1,1988 Page 5

WINCHESTER INTERFACE

There are two choices for a hard disk controller. One is the use of a WDI002A-HDO controller. The other choice is to use an IBM compatible PCjXT controller (WDXT-GEN Western digital). The PT68K-2 will not accept other types of controller cards. The PCjXT type of controller is recommended over the WDI002A-HDO since the PCjXT type is less expensive and is more readily available.

WDXT-GEN Co~tro~~er

1. Plug the controller into one of the PCjXT expansion slots.

2. Connect the 20 and 34 conductor ribbon cables between the controller card and the winchester drive. Use 32 for the first winchester and 33 for the second winchester drive. Be certain to observe pin 1 polorization of the cable between the drive and the controller card. IF THE CABLES ARE PLUGGED IN BACKWARDS THE DRIVE OR CONTROLLER COULD BE DAMAGED.

3. Connect power to the hard disk drive.

from the power supply may be used.

Any of the cables 4. You are now ready to format the drive. Consult the

'HDFORMAT^I command in the SK*DOS manual for information on formatting the drive. Use a step rate code of '5' for drives that have a buffered step.

WD1002A-HDO co~tro~1er

1. The winchester interface port is designed to work wi th a Western Digital WD1002A-HDO controller card. You may substitute a WDI002-05 if desired but the software does not support the floppy controller on the WD1002-05 board.

2. Connect a 40 conductor cable between the Winchester expansion interface connector and the Western Digital WDI002A-HDO board (37 on the PT68K-2 and J5 on the WDI002A- HDO) .

3. The winchester drive should be configured to respond as the second drive (Drive '11 if you start with '0') and its data cable should connect to 32 on the WD1002A-HDO.

4. Connect cables between the winchester drive and the WDI002A- HDO controller. See the Western Digital data sheet for more information.

5. You are now ready to format the drive. Refer to the

I HDFORMAT ^I command in the SK*DOS manual and proceed wi th formatting your winchester drive.

CONFIGURATION OPTIONS

31 - 36 PC/XT I/O expansion slots

37 - Winchester interface connector for Western Digital WD1002A-HDO controller

38 - PIA connector

39 - PC/XT keyboard connector J10 - Power connector

POHER CONNECTION

311 - RS-232 Port 312 - RS-232 Port

313 - Floppy disk connector

NO CONNECTION INDEX PIN +12V -12V GND GND GND GND -5V ' +5V +5V +5V

314 - Test connector (should be shorted) 315 - LED - Power indicator

316 - LED - access of WD1002A-HDO controller 317 - LED - 68000 'HALT' status

318 - Speaker connector 319 - Eprom select

320 - Eprom select

EPROM 319 320 27128 2 1 27256 2 2 27512 1 2

321 - RS-232 Port 322 - RS-232 Port

1 0 0 2 0 J19

EPROM SELECTION

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323 - Reset connector (Shorted = reset)

324 - Processor speed (1=8.0 MHZ, 2=10 or 12 MHZ) 325 - System configuration

Position 1 - DRAM enabled

0 1 0 0 2 J20

Position 2 - DRAM disabled, EPROM is mapped to address 0 Note: 314,315 and 316 will drive LED' s directly. It is not necessary to install a series dropping resistor.

PT68K-2 3une 1,1988 Page 7

P T S B K - 2 S P E C I F I C A T I O N S

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MC68000 Processor, 8.0 MHZ Clock, No wait state DRAM

8 or 10 MHZ uses 150ns RAM, 12MHZ uses 120ns RAM OOOOOO-OFFFFF

FFOOOO-FFOFEF FFOFF1-FFOFFF F80000-F9FFFF FAOOOI-FBFFFF C00001-DFFFFF FE0001-FE003F FE0041-FE007F FE0081-FEOOBF FEOOC1-FEOOFF FE0101-FE013F FE0141-FE017F FE0181-FE01BF FE01C1-FE01FF

RAM (1024K)

RAM (4K) BATTERY BACKED UP RAM CLOCK REGISTERS (MK48T02)

EPROM (128K)

IBM SLOT I/O PORTS (ODD BYTES)

IBM SLOT MEM READ/WRITE (ODD BYTES) MC68681 DUART

MC68681 DUART MC68230 PIA

FLOPPY DRIVE SELECT

WD1772 FLOPPY DISK CONTROLLER WD1002 WINCHESTER CONTROLLER SPARE

IBM KEYBOARD

FEO~-Drive acl Select Register BIT 1 BIT 0

0 0 Drive select 0 1 Drive select 1 0 Drive select 1 1 Drive select Bit 5 - O=Single density

1=Double density Bit 6 - O=Side 0

1=Side 1

0 1 2 3

Note: The first 8 locations of EPROM are mapped to address 0 after a reset. After four liAS" strobes RAM is restored to the first eight locations.

• Board can use 27128, 27256, or 27512 EPROM (EPROM 450 ns).

• Each I/O decode is 64 bytes. This results in some of the I/O devices being multiple mapped within their I/O decode block.

• Floppy drives up to four DS/DD 40 or 80 track. Drives may be 3.5 or 5-1/4 size. Does not support 1.2 MEG or 1.44 MEG drives.

• Winchester interface (38) requires WDI002A-HDO controller card.

• The clock (MK48T02) has a Ii thium battery mounted in the chip. The expected life of the battery is approximately 5 years. The battery will supply 31,000 hours of operation.

• The PC/XT expansion I/O option will allow the use of an IBM PC/XT keyboad, monochrome moni tor and hard-disk interface card (WDXT-GEN).

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3.686400 MHZ OSCILLATOR MC68681P

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27128, 27256 OR 21512 EPROM (450NS) 6116 2K X 8 SRAM (400NS OR FASTER) 74S74

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OPTIONAL (20,24 'OR 32 MHZ OSCILLATOR) 14LS148

14LS164 555

14.318180 MHZ OSCILLATOR 62 PIN CARD EDGE CONNECTOR 40 PIN DUAL HEADER STRIP 5 PIN PC DIN CONNECTOR POWER CONNECTOR

June 1,1988 Page 9

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1.0 uF 16V TANT CAP 0.1 uF DISC CAP 10 uF 16V TANT CAP

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~ ________________________ ^~R

PERIPHERAL TECHNOLOGY

1480 TERRELL HILL RD. SUITE 870 MARIETTA. GA 38067

PT68K-2

REFRESH LDGIC REV

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~ __________________________ ^~R

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PERIPHERRL TECHNOLOGY

148111 TERRELL MILL RD. SUITE 87111 MARIETTA, GA 3111067

PT68K-2

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PERIPHERAL TECHNOLOGY

1488 TERRELL HILL RD. SUITE 878 MARIETTA, GA 3B867

PT68K-2

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