599 Results for "%E3%80%8A%EC%98%88%EC%95%BD%EB%B2%88%ED%98%B8OIOX8489X83O6%E3%80%8B%EA%B0%95%EB%82%A83hours%E2%80%BB%E2%82%84ours3hours%EB%A0%88%EA%B9%85%EC%8A%A4%E3%81%843hours%EB%A0%88%EA%B9%85%EC%8A%A43hours%E2%99%A3%E2%97%873hours%EB%A0%88%EA%B9%85%EC%8A%A4%EA%B0%80%EA%B2%A9linked 3hours%EB%A0%88%EA%B9%85%EC%8A%A4%E2%85%B73hours%EB%A0%88%EA%B9%85%EC%8A%A4%EA%B0%80%EA%B2%A9%E3%82%B9%E3%81%84status"

10/8/23 Update
Log from 1802 MemberChip Card
Here are some "Quickstart" instructions for the Menu, BASIC, VTL2, and Visual/02 programs in Mike Riley's alternate program ROM. They're not a full manual yet, but will get you started and give you a "taste" of vintage programs and languages. A Quickstart...

In The Radio Domain
Log from Reverse-Engineering the milight on-air protocol
The first step in reverse-engineering any radio protocol is to listen to it on the air. The advent of software-defined radio makes this much, much, easier than before. For this project I've used a nuand bladeRF board and the GNURadio software stack,...

Different SD card MBR formats
Log from OSI SD Card Operating System (OSISDOS)
I tried a couple of other cards and found that they have different MBR formats with no header. I noted this in a previous log. There's an offset at 0x01BE that points to the MBR. My theory is this is true for "bigger" cards. I think the reason I could...

The actual informations
Log from Extension card for TDS3000 scopes
Detecting and identifying a card As stated in an earlier log, the card insertion is detected by grounding the pin *CD. But this is not enough to make the scope believe he have a know card inside him. You need to indicate him what type of card was inserted....

Multi-boot Multicomp (Part 2)
Log from 3-Chip Z80 Design
I've got the BIOS loading for Multi-boot Multicomp. It boots up to the Multi-boot prompt. > Available Commands: :ccxxxxiibbbbbb Load Intel-Hex file record Rxxxx Run from address xxxx Sddd System boot Iddd Init: Format directory Pddd[,xxxx] PutSys: write...

Three Dollar EC - PPM Meter [Arduino]
Log from Hacking the way to growing food
This Blog will Cover How to build a cheap EC meter for your aquaponics/Hydroponics or water quality related projects. We are not going to get into what the ideal value of PPM or EC is, Just cover how to measure and quantify a fluid.We will be using this...

Designing the custom LCD
Log from Fluke 8060a Custom LCD
Dave at eevblog posted an excellent video series on designing custom LCDs, so I watched those a number of times. I also found another eevblog user who posted a great writeup of a replacement LCD he designed for his Tandy/Radio Shack TRS-80...

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...

20230216b -- "Files"
Log from ROM Disassembly - AlphaSmart Pro
The gist of this unit is that you type text into a discrete 'file' and then you can edit and later transfer to a separate computer via the keyboard emulation. While whizzing through the code doing other things, various strings caught my eye, such...

The bugs
Log from Semyon
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...

20230219a -- File Sending Speed
Log from ROM Disassembly - AlphaSmart Pro
While whizzing through the keyboard stuff, there is some special handling of some keystrokes. This is by scan code, so it's difficult for me to puzzle out what they are. One exception, though, is for setting the 'send speed'. There...

Display impressions
Log from Fully featured dough proofing box
On a lazy saturday evening I had nothing better in mind than hacking together a breakout board for my EA DOGL display. This type does need 9 caps and works with 3V3 only. So I had to add 5 level-shifters (10 resistors).Top view:Back view:Looks a bit...

Sound
Log from Dodo: 6502 Game System
All along I knew I wanted to figure out sound for Dodo because a game system just wouldn't be right without it. I have been going back and forth with lots of different approaches in my mind. Dedicated sound generation chips that mixed both digital and...

Reverse Engineering the BASIC Program
Log from Optronic Laboratories 740A/D Spectrometer
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...

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...

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