Diodes D2 and D3 don't seem to be on hive-1-ver3-r13-b sheet 3 of 4
But I see from the BOM that they are the last two 1N4001
Are both located on sheet 2 in the middle. These diodes summarize the handshake signals from Administrators and Bellatrix by OR.
At least there was no smoke.
External RAM:
In the tutorial "regnatix-code" there is an extra chapter to the ram. There are charts and also to find spin-code for example. maybe it helps you further.
http://hive-project.de/build-your-os-%E ... 80%93-eram
If you have an EEPROM on Bellatrix, you can start the spin-ramtest:
Bellatrix <— “bellatrix.spin” (per flash for video-interface)
Regnatix <— “ramtest.spin” (per ram)
You can find the file in testpackage under "test regnatix ram". If you bellatrix flashes in the video-code, you can also test in regnatix by ram a simple command line.
For Bellatrix und Regnatix there are two tutorials "bellatrix-code" & "regnatix-code".
: !LATCH ( addr - ) / set address latch value ;
: !DATALINES ( value - ) / put value on data lines ;
: @DATALINE ( - value ) / get value on data lines ;
: @SRAM ( addr - value ) !LATCH @DATALINES ;
: !SRAM (value addr - ) !LATCH !DATALINES ;
The forth-code: In the latch, only the higher eight bits from the adress be saved (whith /AL-signal). In the next step is the least significant part output to the ports at the propellerchip. Then the data read or written.
Should !LATCH not receive the address value for the next word?
: !LATCH (addr -- addr) / set high-adress in latch ;
I would do so, but probably there are better structured and easier words:
: !HADDR (addr -- addr) / set high-addresse ;
: !LADDR (addr -- ) / set low-address ;
: @RAM ( -- value ) / read byte ;
: !RAM (value -- ) / write byte ;
: @SRAM (addr -- value) !HADDR !LADDR @RAM ;
: !SRAM (value addr -- ) !HADDR !LADDR !RAM ;
I'm afraid to burn something....
In the code of the bus to be accessed to be careful that there are no conflicts. But I not think you can physically damage the chips - I've heard that the propeller are very robust.
For the bus protocol you have to come look at the charts in the tutorials. unfortunately only in German ... : ( In the tutorial is limited to very few bus routines, which can reproduce well in forth.
In this tutorial is a simple Bellatrix-computer with a simple command line created. The general theme is spin, video and keyboard. The other two propeller will not be used here.
In this tutorial are coupled Bellatrix and Regnatix on the bus. Here is the central theme of the bus and the communication between Regnatix and Bellatrix as master and slave. Bellatrix is a slave functions and Regantix can use these functions.
It starts very simply with a little code which runs in Regnatix and character to send Bellatrix, which are then displayed on the vga.
I have plenty of 1.8K measured as 1781 ohm) and 2.2K (measured as 2156 ohm) resistors on hand. Does it matter if its slightly high or low? Is one better?
Would function both values, I would use 2.2 kohm.
C21 and c22 on the BOM are listed as electrolytic capacitor, yet the picture img_0855.jpg show ceramic caps in those positions. Are these also to be 0.1 uF? Since I already have the electrolytic, can I use them?
It works both variants.
What is part L1? I missed this on the BOM, but I see from the picture that this position is populated.
For this component-we have never found anything suitable and simple wireless bridge used. For the function that is irrelevant.
Important of quartz: in this part it must be a "keynote quartz is" act. a "obertonquarz" does not work because the chip will run on a wrong frequency.
For example:
http://www.reichelt.de/?;ACTION=3;LA=44 ... 2280bfc52a <--- FALSE
http://www.csd-electronics.de Order-Number: 14-US25,000MHZ <--- CORRECT
