478 Results for "%E3%80%8A%EC%98%88%EC%95%BD%EB%B2%88%ED%98%B8OIOX8489X83O6%E3%80%8B3hours%EB%A0%88%EA%B9%85%EC%8A%A4%EF%BC%B13hours%EB%A0%88%EA%B9%85%EC%8A%A4%EA%B0%80%EA%B2%A9red3hours3hours%EB%A0%88%EA%B9%85%EC%8A%A43hours%EA%B0%80%EA%B2%A9normal 3hours%EB%A0%88%EA%B9%85%EC%8A%A4%E3%81%97%E2%80%A1%EA%B0%95%EB%82%A83hoursdark"
Using a counter for the ISRI received a suggestion to use a counter and trip method for the Interrupt Service Routine (ISR). While is was not keen as the method (Direct Digital Synthesis) is pretty standard and gives the best long term accuracy. But...
I uploaded a copy of the BASIC program that ran the system. The important part was this, which I annotated what it did. With this Information and finding the interface to the spectrometer is a 48 line DIO board I was able to figure out what lines did...
SATA StatusAfter weeks of painful debugging. I have been able to read and write to the hard drive!I ran into an issue though... the speed at which I can communicate with my FPGA to/from my computer maxes out at about 16MBs and the hard drive reads/writes...
Fortunately most of the NASA documents are available. They can be found on-line at https://www.ibiblio.org/apollo/Documents/ The following documents are what I leaned heavily on in gaining an understanding of how this computer...
As the amazing online GPRS Weather Station project continues, we have yet another upgrade to the vast array of sensors with a professional analogue wind vane, kindly donated by Vector Instruments. This device will eventually be hooked into the new, upgraded,...
One thing I've learned from this project is that programming in C keeps the programmer from lots of trouble - it generates the tedious parts of the assembly for you such as switchcase implementations, it assigns variable addresses for you, makes wise...
Dumped data the other day after we've had some wicked weather (leading into freezing temps again, of which I hope last night was the last)-=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2016.04.04 06:17:37 =~=~=~=~=~=~=~=~=~=~=~=0: 24 km - Thu Apr 1 2016 3:28:25...
This log contains the details of the mechanical stuff -- the dimensions and materials. I will attempt to generate a concise description of how to build the seismometer in the Instructions section. I believe these drawings are accurate. Sorry for the...
I guessed that the phone app opened some sort of socket communication channel with the "aircraft-ctl" program running on the camera board. I figured the thing to do was to try to capture the packet stream between the camera and app and then find out...
10/24/2020: I gave a talk about Talker/80 on TrashTalk Live #8: The INPs and OUTs of Talker/80, A Modern Voice Synthesizer for the TRS-80. Thanks to Pete Cetinski (TrashTalk host) and Arno Puder (known for his TRS-IO) for inviting me; here is the PDF...
I have started to squeeze the hook code. This can be done by merging the start, stop and data bits into a 16 bit register and use the same loop to transmit all the bits from the RS232 character (i.e. 10 bits). It also has a positive side effect that...
When you search google for FAT file format you get tons of pages on formatting disks. It's harder to pull out the detailed format of the SD card. Wikipedia to the rescue (Design of the FAT file system). A less technical FAT32 Wikipedia page is File...
It seems I have reached the base camp. The el-cheapo 7-inch LCD monitor on the right is connected to the output port of my breadboard TTL computer. The computer is now running at 6.3MHz and runs a software loop that generates a VGA test signal. The colors...
In this post I want to share how I selected a suitable topology for the resistor network that will be the core of the programmable decade resistor. Although I did some online “research”, the following criteria determined my choices: Switch...
Intrigued by the various file-related pointers seen in deleteThisFile_EB9B, I remember that the keyboard scan routine had a final case where the bulk of the keystrokes (the printable ones) are handled, and there was a scan code to ASCII routine before...