2151 Results for "%EA%B0%95%EB%82%A8%EC%98%A4%ED%94%BC%EC%9D%B4%EB%B2%A4%ED%8A%B8%E2%86%B2optime4%E3%80%82com%EA%B0%95%EB%82%A8%EC%98%A4%ED%94%BC %EA%B0%95%EB%82%A8%EB%A7%88%EC%82%AC%EC%A7%80 %E2%86%B2 %EA%B0%95%EB%82%A8%EC%98%A4%ED%94%BC%E1%98%AE %EA%B0%95%EB%82%A8%EC%98%A4%ED%94%BC%EC%83%9D%EA%B0%81%E1%98%AE %EA%B0%95%EB%82%A8%ED%9C%B4%EA%B2%8C%ED%85%94 %EA%B0%95%EB%82%A8%ED%82%A4%EC%8A%A4%EB%B0%A9 %ED%83%80%EC%9E%84"

Building a CP/M System Disk
Log from My CP/M Single Board Computer
Building a CP/M System Disk To avoid rewriting the assembler codes for ccp, bdos and cbios so that they can co-exist in the same file. I can append the i8hex files and remove the "end of file markers". To make the hex file more readable I have changed...

Update After A Long Pause
Log from 8 Bit TTA Interpreter
Update I rebuilt the paged memory board and the Flash Programmer for a ZIF socket. It allows quick and easy Firmware updates. Other than a initial glitches for the Flash Programmer (probably still wet from the solder flux solvent), it all works. Now...

Understanding how the computer works
Log from Apollo Guidance Computer
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...

20230214b -- LCD revisited
Log from ROM Disassembly - AlphaSmart Pro
The LCD analysis isn't strictly complete. While I'm pretty sure I found the data lines (nybble mode, PD5-2), there are control lines as well.While rummaging through the RAM stuff, I came across a routine:F618 sub_F618: F618 86 01 ldaa #1 F61A BD...

Analogue Wind Vane With Auto Set Up
Log from Arduino GPRS IOT Weather Station
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,...

Progress on the EC
Log from Reverse engineering Toshiba R100 BIOS
Some progress has been made the past few days on the actual Renesas EC chip. A detailed log will probably follow in the upcoming few days, once I get the chance to take a few pictures and screenshots.In 2014 I etched a PCB to mount the EC on after desoldering...

Firmware hacking
Log from Model S BMS hacking
Here is a rough schematic of the isolated bus circuitry. It looks like there is some shared "open collector" style bus on CH4 of the isolator, with D8 and (I assume) a pullup on the BMS controller board. But so far I've only ever measured this line being...

[E1][R][X] AirBerries: Learning a custom keyboard layout
Log from Tetent [gd0090]
So I've recently got a fully electrically and mechanically complete CAD model of Tetrinsic and was, once again, doing some research for Tetent, mainly because I don't like how this featureless flat face looks: It turns out that the eteeController...

♫ Flash! (aa-aahh!) Saver of the Usersettings! ♫
Log from HP 82240B IR Receiver and Printer Interface
Summary:It occurred to me that it would be useful to save some configuration in a non-volatile manner. This board and this chip does not have any conventional non-volatile storage (e.g. EE or external serial EE), but there's plenty of pages of unused...

Everybody loves benchmarks! The numbers are in!
Log from Bit-serial CPU based on crossbar switch
When calculations are done 1 bit at a time, one should probably not expect blazing speed. To measure the clock cycles per operations, I simply baked a 8-digit BCD counter into the system and increment it at each cycle, and reset to 0 at each...

20230225a - Displaying the Current File
Log from ROM Disassembly - AlphaSmart Pro
sub_F374 has caught my interest because it seems to be painting the LCD with the currently selected file's contents according to several state variables that I have not fully reverse-engineered.The routine begins like this:F374 sub_F374: F374 BD F6 18...

improved encoder reading
Log from Whiteboard Drawbot
The software I'm modifying does an encoder read as follows: int rot = ((digitalRead(BTN_EN1) == LOW) << BLEN_A) | ((digitalRead(BTN_EN2) == LOW) << BLEN_B); // potentiometer uses grey code. Pattern is 0 3 switch (rot) { /** logic to interpret the value...

Dumping the external flash
Log from Color Open Source Smartwatch
Yesterday I dumped the external flash. You can find the image in the owncloud archive.Turns out most of it is used to store an almost complete 16-bit Unicode font. I figured that out by converting the binary to an image and looking for repeating or familiar...

Display
Log from Apollo Guidance Computer
I started wiring up the Memory sub-system board and realized quickly that I needed the display board to show the state of the various registers. I first had to create a backplane to connect the boards into. The backplane carries all the signals...

Another!
Log from Vintage Z80 palmtop compy hackery (TI-86)
sheesh, now Goodwill is making a habit of having one of these calcs on the shelf. This time a TI-84 Plus. I don't need another, do I? I haven't seen the 82 I got in middleschool in maybe a year. I think it wound-up in storage. The 83 plus(?) I got last...

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