This interface became a standard to almost all operating systems we know today. IDEfile is a ProFile compatible hard drive for Apple /// and Lisa systems. Emulation of the classic 5MB ProFile and the rare ProFile 10M is provided. I intend to support Widget_10 and a big 20MB Widget_20 too, but before that I have to figure out the syntax of its additional commands. Any help on this
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is appreciated, also any technical information on calibrating and formatting these beasts! IDEfile employs an IDE hard disk to store its data. I wanted to use components that could be used with a machine from the early `80s without getting red in the face (no FPGAs, no ARM7 cpu, . ), but some trade-offs towards modern technology had to be made. A 80C31 microcontroller executing about 1800 lines of assembler code and two GALs control the system. The use of a CF card in True IDE mode instead of the IDE drive should also be possible, however I cannot recommend this. LisaOS writes about 30 blocks just to load the Envrionments Window, therefore the 100. 000 write cycles of a flash card would be consumed very soon. Depending on the size of the hard disk, up to eight volumes (partitions) are supported. From the host`s point of view, each volume is a different hard disk, but only one can be accessed at the same time. Each volume could be of the following types: A block has a size of 532 bytes. Therefore two sectors on the disk are used, the space required on the hard disk is two times the volume size. IDEfile does not care about the number of bytes sent or read by the host, as long as it is below 1024 bytes. IDEfile`s PCB has a size of approximately 100mm x 140mm, this is the same size as a 3, 5" hard disk. It can be mounted on the back of the drive, resulting in a compact unit which can be fitted into Lisa`s hard drive cage or...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
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The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
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In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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