The original inspiration for the board was to bring the extremely popular xtide project to a pc jr compatible form factor. Do you want to use dip switches like the original xtide called for, or jumpers like the xtide version 2 schematic has. Sorry about the file name being v2 every time this is not the revision number, this is just supposed to signify that its based on the xt ide version 2 schematic. The hardware on the modern side of the is just a pi and a usb to rs232 adapter, set. Allenbradley schematic ibm pc xt schematics 1771ke ibm pc schematics 1784cas 1784cak 1771kg. That rom contains software, the xtide universal bios, software that was developed. The bus was largely backward compatible with the 8bit bus of the 8088based ibm pc, including the ibm pc xt as well as ibm pc compatibles. Glitch works continuing extension of the xt ide rev 2 isa controller.
Some documentation would be nice as it would save setup time. This modification was incorporated into revision 2 of the xtide card named hispeed mode and into 2. The original inspiration for the board was to bring the extremely popular xt ide project to a pc jr compatible form factor. The xtide universal bios project is now hosted at 2 in order to provide continued access to this information in a place where it will be available longterm. Its byteprogrammable but with a software data protection scheme which prevents bad code elsewhere overwriting the contents that isnt supported by the xtide universal bios utility, flashing this card will be a twostep process. This card allows connecting a compact flash cf card to computers with isa bus and using it as a mass storage device. Schemeit free online schematic and diagramming tool. Schematic diagram maker free download or online app. The bus was largely backward compatible with the 8bit bus of the 8088based ibm pc, including the. If you need to use a dedicated schematic package, as part of a pcb layout, then id also recommend gschem, part of the geda suite. This means is that, in effect, there are two versions of the xtide rev 1 cards in existance.
Using a cftoide adapter, a cf card can be used in place of a 16 bit. It allows any pc xt class machine to use modern ide hard drives or compact flash devices for long term storage. Ide drives were released to the market well after the days of the ibm xt and. Xtide is a controller card that translates relatively new ide cards or an. Detailed design description the sergeys xt system is a hybrid of ibm pcxt, ibm at and ibm ps2. When another request for an assembled xtide or full parts kit popped up on the vc forums, i responded that i had a few xtide rev 2 boards available, if anyone wanted to buy.
Xt al correct v pp mclr typical cable length is 6 inches ta r get application device target device must be running with an oscillator for the debugger to function as a debugger. The fundamental architecture consists of few simple components. It is also often used to draw oneline diagrams, block diagrams, and presentation drawings. Hs is a higher speed version of xt for use above 4 mhz. Additionally, it also interfaces the bios eeprom containing the firmware. Older xt hdd controllers also use dma, but it is unlikely that you will have one or use it with your xt system. The xt ide rev 3 has been superceded by the xt ide rev 4, which is a general improvement in ide compatibility and ease of assembly, but remains 100% hardware compatible. If you look at the design of the xtide circuit, it loads 16 bits into a latch and then feeds them to the bus sequentially. Xtide universal bios configuration and flashing program. The xt ide arrived quickly and the price is more than fair. Check out the list below outlining the features and drawbacks of each of the top 10 best ide software programs. Xtide basics before reading further, read the web page at here, to gain information on the basics of the xtide.
The xtide project is a vintage computer forum driven project to develop and manufacture an 8bit isa ide controller. If the device has avdd and av ss lines, they must be connected for the debugger to operate. Pc compatible diskettes containing windows based software equipment requirements the evaluation. However the evergrowing ecosystem of hardware and software contributors now set it apart from the competition as much as the price point. Jul 30, 2010 the xt ide project is an open source venture where a group of people designed exactly what i needed with fairly common offtheshelf parts. The logic is designed in software by drawing a schematic, and then. Xt ide basics before reading further, read the web page at here, to gain information on the basics of. Photo identification a photo of an xt ide rev 3 card is here. A friend and myself were bouncing around the idea of using an avr and some tri state buffers to set the thing into 8 bit mode so we can use the cf on an xt ide type system. Industry standard architecture isa is the 16bit internal bus of ibm pcat and similar computers based on the intel 80286 and its immediate successors during the 1980s. Xt ide basics before reading further, read the web page at here, to gain information on the basics of the xt ide.
This card will allow a compact flash card to be used as a hard drive in an ibm xt or compatible machine. Some differences of my design from original ibm pc and ibm pc xt. It will also work with ata2 compliant hard drives and with sd cards via an fc6t adapter. From the xtide project wiki our version of the xtide controller replaces the 7400series logic chips with a cpld, a chip that can be programmed to replace dozens of individual logic chips. You have to use one of the very limited 8bit ide drives, as the controller will only work with those. Parallel ata or pata is a 16bit interface standard developed long after legacy 8bit machines like the ibm 5150 pc and the 4680 jr were obsolete. Where can i find xtide 8bit ide, xta specifications. The article describes an ide interface for both the pcxt. Select from a huge library of vector schematic diagram symbols that scale easily without quality degradation. Schemeit free online schematic and diagramming tool digikey electronics. Smartdraw is more than just easyit is also an incredibly powerful tool. Should be done on power up by the avr itll then activate the buffers so the host can see it and itll be initialized long before the host system posts. Xt cflite v4 is a remake of james pearces xt cflite card, which in its turn is a simplified version of his cpld based xt cf card, and shares some ideas with xt ide card.
More info on the glitch works project to provide boards, kits, and fully assembled units can be found here. Pdf lxd335 lxd335 lxt335 64pin ugt3351097200 ibm pc xt schematics level one communications log rx2 0801 jp pe65586. This revision of the card is typically referred to as xtide rev 1 or xtide revision 1. Hispeed mode during production of the xt ide revision 1 card, some people made a modification to both the card and the bios software, in order to make the card run faster. Detailed design description the sergeys xt system is a hybrid of ibm pc xt, ibm at and ibm ps2. This board, when used with a custom bios like the xtide universal bios, allows the use of modern 16bit ide devices on the 8bit isa bus. That would be an idext as opposed to ideat adapter, and they are a strange beast. The xtide rev 3 has been superceded by the xtide rev 4, which is a general improvement in ide compatibility and ease of assembly, but remains 100% hardware compatible. For that i need specifications timings, registers, commands, but i cannot find them anywhere. Discussions about the tandytrs80 line of computers from the model i on up.
The xtide arrived quickly and the price is more than fair. Our version of the xtide controller replaces the 7400series logic chips. Im on mac now and use windows laptop as well, so for me the ability of conceptdraw to work. It includes thousands of templates and examples to help you get started quickly. I had my friend james to burn the code onto the eeprom for me because i have no way to put something on a 360k floppy disc but aside from that, the project primarily consists of easy throughhole soldering. It is essentially a data bus extension from the pcat bus to an ide device. General factors to consider when choosing the best ide include the languages it can support, ease of use and cost. This is the third revision of the xtide card produced by the vintage computer forums vcf, not the first nor second nor fourth revisions. How to build an 8bit ide controller for a pc xt notanon. Some differences of my design from original ibm pc and ibm pcxt. It allows any pcxt class machine to use modern ide hard drives or compact flash devices for long term storage. Ide to compactflash cf adapter schematic pinout idesignal idepin connect to cfsignal cfpin cfpin cfsignal connect to idepin idesignal gnd gnd 1 26 cd1 nc d03 11 d03 2 27 d11 10 d11 d04 9 d04 3 28 d12 12 d12 d05 7 d05 4 29 d 14 d d06 5 d06 5 30 d14 16 d14 d07 3 d07 6 31 d15.
Seagate momentus laptop hard drive support quick start guide, installation, troubleshooting tips, downloads get support for momentus laptop hard drives here. When another request for an assembled xt ide or full parts kit popped up on the vc forums, i responded that i had a few xt ide rev 2 boards available, if anyone wanted to buy. A friend and myself were bouncing around the idea of using an avr and some tri state buffers to set the thing into 8 bit mode so we can use the cf on an xtide type system. I really hope this repair holds and there isnt some other underlying problem. Welcome to the schemeit free online schematic and diagramming tool digikey electronics schemeit project. The xt ide project was also the foundation for the above design goals. That would be an ide xt as opposed to ide at adapter, and they are a strange beast. The logic is designed in software by drawing a schematic, and then uploaded to the cpld. Rc mode uses an external rc network as shown in your diagram.
Xtide basics before reading further, read the web page at here, to gain information on the basics of. As a development of the dangerous prototypes xt ide design, the board is based on a programmable logic cpld chip, so the logic making it work is literally drawn out in software and then programmed into the cpld chip and this can be done overandover. Xtide 8bit ide controller glitch works continuing extension of the xtide rev 2 isa controller. Xtide universal bios can be used on any ibm pc, xt, at or 100% compatible system. Xtide universal bios alternatives and similar software. In situations like this, i use inkscape to make great looking schematic diagrams that show exactly what i want to show. Ive tried omnigraffle, and conceptdraw, they both do a good job but conceptdraw seems to be more powerful tool.
Should be done on power up by the avr itll then activate the buffers so the host can see it. Xtide is a controller card that translates relatively new ide cards or an emulated drive on another computer as a hard drive on the vintage pc, just like a controller card would. When the ide command register is written, the busy bit is automatically set and an interrupt is thrown to the pi. Xtcflite v4 is a remake of james pearces xtcflite card, which in its turn is a simplified version of his cpld based xtcf card, and shares some ideas with xtide card. Tinycad is a program for drawing electrical circuit diagrams commonly known as schematic drawings. For xt systems you can use xtide rev1 not available anymore, xtide rev2 or jrideisa.
Typical 6pin icsp pinout pin target mplab pickit 4 1 mclrvpp. For xt systems you can use xtide rev1 not available anymore, xtide rev2 or jr ide isa. Hispeed mode during production of the xtide revision 1 card, some people made a modification to both the card and the bios software, in order to make the card run faster. Making an xtide derivative in such a small pcb meant minimising the component count. Essentially when the ide standard came out, they made a very cheap and very slow 20 and 40 mb version that was compatible with a special 8bit ide card. When using xt ide it is possible to save a couple of components.
Jul 31, 2010 if you look at the design of the xt ide circuit, it loads 16 bits into a latch and then feeds them to the bus sequentially. It was delayed by running it through two sections of a 74ls04 inverter and one section of a 74ls32 or gate, with one input of the or gate tied to ground. Glitch works continuing extension of the xtide rev 2 isa controller. The xtcfv3 therefore provides another mechanism to allow the software. One known cause of a few is that, for whatever reason, the xtide universal bios software within the eeprom chip. That modification to revision 1 cards became known as the chuck mod. This is the third revision of the xt ide card produced by the vintage computer forums vcf, not the first nor second nor fourth revisions. Well, if you really want every single 8k block in that range available, i guess dip switches would make it a lot easier on the end users.
The project is entirely open source, from the design, schematic, layout, bill of materials, bios, drivers and any. For the board itself, see the development board schematic page. Sorry about the file name being v2 every time this is not the revision number, this is just supposed to signify that its based on the xtide version 2 schematic. This board, when used with a custom bios like the xt ide universal bios, allows the use of modern 16bit ide devices on the 8bit isa bus. Figure 3 shows the schematic between the 82c55 chip and the ide connector. Photo identification a photo of an xtide rev 3 card is here. The lotech 8bit ide adapter has been designed around a 3dprinted isa slot. Xt mode uses either a crystal or an external oscillator input. The circuit diagrams of the article indicate that the hardware of an ide interface is in fact very simple.
It supports pcb layout programs with several netlist formats and can also produce spice simulation netlists. Schemeit is a free online schematic drawing tool that will allow you to produce professional looking schematic diagrams, add corresponding part numbers, and share your schematic with others. Whilst the xtcflite was based closely on the original xtide adapter, borrowing directly its or and inverter gate design to provide ide register access and ide reset, with this new board this has been condensed into a single. Schematic diagram, only one chip and a few passive parts are required to connect the ide drive to the 82c55 chip. Use the app to build and program your robot directly from your tablet, without the need for any wires or additional software. Smartdraws schematic diagram software is easy to use. It is important to realise that this modification has both hardware and software components. This one fixes the issues that i know i caused, and that im sure are issues. The xtide project is a vintage computer forum driven project to develop and manufacturer an 8bit isa ide controller. On at systems you can use any 16bit isa or vlb ide or multi io controller.
As with the original project, the board is completely open source, licensed under the gnu gpl v3. Xtide universal bios is mainly used with xtide controller to use modern ide drives on pcxt. Program your ev3 robots in the fastest, smartest and most fun way possible. The xt ide schematic and pcb layout for kicad may be found on the. The xt ide project is a vintage computer forum driven project to develop and manufacturer an 8bit isa ide controller. Xtide rev 4 assembledtested 8 bit isa gwxtide4 tindie. The goal is to have an open source implementation, including schematics, pcb, bios and related software.