Now that we can read SD cards and have an I/O interface in place from the Z80 to do I/O mapped access to the SD card it's time to hook the two pieces together. To do this we will need to look closer at how Grant's code request blocks. The loader...
Digging into SD card writes means shifting gears from the Boot BIOS source code since the Boot BIOS code only does reads. The CP/M BIOS code (CBIOS128.LST) which does the reads/writes after booting. Here's the BIOS code for writes to the SD Card: 0754...
Pleased to discover there are ready to use, non-emulation SD card mux devices available! These are great for 99% of the use cases folks message me about. https://wiki.tizen.org/SDWire SD Wire https://www.tindie.com/products/badgerdnl/sdwire-usb-c-sd-card-reader-sd-mux/...
Requirements Easily found when misplacedBig enough to hold easily but not too big that it's cumbersomeShould have a battery compartment so that unskilled personnel can replace batteries without having to open up the housingRoom enough for the necessary...
MIKBUG (Smithbug) has the following case-sensitive commands. ; V VIEW MEMORY; E CHANGE MEMORY; M MOVE MEMORY; I FILL MEMORY; F FIND ; D DISASSEMBLE CODE; & S1 LOAD PROGRAMME; G GO TO PROGRAM; J JUMP TO TARGET PROGRAM ; T TRACE PROGRAM; K CONTINUE...
Looking at the registers I noticed something. the first 24 bytes look like they have data and the last 6 bytes look like they have data. This looks like what a WII peripheral in encrypted mode would look like. The fixed 8 byte pattern repeating every...
Earlier version of the device was reconsidered in terms of following aspects:• Accommodating for different refractive errors • Aesthetics • Ergonomics • Weight distribution OIO ASSEMBLY EXPLODED ASSEMBLY1. ACCOMMODATING FOR DIFFERENT REFRACTIVE ERRORS...
On my TI-89, one of the battery contacts on the PCB was heavily corroded and it took a good deal of time and heat to reflow solder to make a new pad. I did this to the V200 as a preventative measure too, but I guess I heated up the nearby fuse to where...
Had to dig into the FPGA code for the SD card. Using Neal Crook's documentation of Grant Searle's version (longer pedigree on the page). The status register values are: // SD_Status bit values from Neal Crook's documentation of Grant's SD card // b7...
When the first ideas for this Cyerdeck came up, I was already sure to create it modular, as much as possible. As such I had defined the following requirements for myself:All "Modules" MUSTbe easily replaced for future improvements, modification...
I've been testing the deep sleep mode on the ESP-03. I loaded the frankenstein firmware from here https://github.com/nekromant/esp8266-frankenstein onto the module to test the deep sleep mode.Note, you need to tie gpio15 to GND in order to boot any firmware...
So since the Teensy++ 2.0 bootloader is not available and I'm not feeling comfortable to learn all the bells and whistles of USB communications I was looking for other options. Googling "at90usb1287 arduino" I found this https://github.com/mattairtech/ArduinoCore-avr...
As you can see airodump-ng picked up the WiFi of the drone and also that it is running on channel 2. Next I recorded some packages. sudo airodump-ng -w JJRC_out -c 2 -bssid 10:A4:BE:2E:77:B5 wlan0mon While recording I simply used all the functions the...