© 2003 WRS software design, Humboldt Strasse 12, 45886 Gelsenkirchen
Bus Buffer Board and Interrupt Logic
for the PAK68/3 and Panther/2
Страница 1: ... 2003 WRS software design Humboldt Strasse 12 45886 Gelsenkirchen Bus Buffer Board and Interrupt Logic for the PAK68 3 and Panther 2 ...
Страница 2: ...Rohmann R Skuplik GbR Humboldtstrasse 12 45886 Gelsenkirchen TEL 0209 87 30 01 FAX 0209 87 30 02 E mail info wrsonline de WWW www wrsonline de Documentation R Skuplik H Zimmermann 5th Edition from 01 27 2003 Limitation of Liability We reserve the right to make changes to the hardware the GAL equations or the documentation without restrictions We are not responsible for the accuracy of the manual o...
Страница 3: ...ng the PuPla 2 4 2 1 Prerequisites 4 2 2 The Construction 5 3 Installing the PuPla 2 5 3 1 Preparation 5 3 2 Installation without PAK DIP CPU 6 3 3 Installation with PAK DIP CPU 6 3 4 Installation without PAK PLCC CPU 7 3 5 Installation with PAK PLCC CPU 8 4 Configuring the PuPla 2 8 4 1 The Jumpers 8 4 2 The GALs 9 Appendix A Component Layout 11 B Parts List 13 ...
Страница 4: ... assume no liability nor offer free repair service for faulty or poorly built circuit boards The circuit and the board itself were developed and tested with great care so errors from this side are essentially ruled out By using SMD components in the assembly the PuPla 2 is very small It works smoothly with or without the PAK so a network solution using only the Panther 2 and a 68000 is possible 1 ...
Страница 5: ...nient configuration via jumpers Mainboard interrupt logic for the Panther 2 Small dimensions due to SMD components 2 Building the PuPIa 2 2 1 Prerequisites This chapter isn t relevant to owners of the finished device If this applies please continue reading from Chapter 3 onwards We assume that the empty board has been purchased by persons who know what they are doing and can get the components the...
Страница 6: ...x A This is a result of cost considerations which made further silkscreening impossible The component specifications can be found in the parts list in Appendix B 3 Installing the PuPIa 2 3 1 Preparation The CPU must be socketed in order to install PuPla 2 since it must operate on or above the PuPla 2 board itself If your CPU is not socketed then the best way to do this is to use a fine side cutter...
Страница 7: ... of the Panther 2 on top of the PuPla 2 which can then be plugged into the mainboard With this the installation is complete Thus this is the sequence from bottom to top Mainboard PuPla 2 Panther 2 CPU The exact meanings of the jumpers are explained in Chapter 4 1 3 3 Installation with PAK DIP CPU This is probably the most common variation since the PuPla 2 was mainly developed as a buffer board fo...
Страница 8: ...have a preexisting control signal from the Panther 2 to the PuPla 1 it is no longer necessary The PuPla 2 uses J1 to make all the necessary adjustments so that the data bus drivers of the Panther and PuPla 2 do not work against each other when the Panther is operated above the PuPla 2 The exact meanings of the jumpers are explained in Chapter 4 1 3 4 Installation without PAK PLCC CPU In this case ...
Страница 9: ...quite as easy as you might think You can read about this in Chapter 3 4 If you have successfully overcome this hurdle then the installation is the same as described in Chapter 3 3 4 Configuring the PuPla 2 4 1 The Jumpers The PuPla 2 is configured mainly via the jumper pins but changing the GAL equations can also affect the configuration First here is the explanation of the jumper pin header The d...
Страница 10: ...ing the buffering capabilities The current equation for this GAL is named PUF2 004 GAL2 labeled AVICTRL on the silkscreen This GAL is responsible for controlling the interrupt functions Unfortunately the current equation has changed since delivery and is now called AVI5 06b The tests with the first equation have shown that in a very specific situation the GAL may cause a bus error two bombs when w...
Страница 11: ...e b version of the equation a level 5 interrupt acknowledgment is always executed an an autovector So you don t need the interrupt request of the network card This prevents the bus error but unfortunately now no autovector interrupt level 5 can be triggered This solution is not that bad since we don t know any extension that has these requirements If you are unable to update the PuPla 2 AVICTRL GA...
Страница 12: ...Appendix A Component Layout Page 11 PuPla 2 Appendix A Component Layout ...
Страница 13: ...Appendix A Component Layout PuPla 2 Page 12 ...
Страница 14: ...C3 1 74HCT573 SMD IC4 IC5 2 74F245 SMD R1 R16 16 Resistor 100 ohm SMD 1206 R17 R20 4 Resistor 4 7k ohm SMD 1206 for PUFGAL 1 Resistor 2 2k ohm Cl C6 6 SMD Capacitor 100nF 1206 for the GALs 2 DIP Socket 24pin narrow PAK 2 SIL Socket 32pin Mainboard 2 Plug In Adapter SIL 32pin CON1 1 Pin Header double row 8pin angled 2 Jumpers for CON1 ...
Страница 15: ...Space for Notes PuPla 2 Page 14 ...
