We are in a new month with some new boards and updates to existing boards. I finally finished the three Youtube video series on using the PICKit3 and Microchip’s MPLAB X IDE to program the PICs used in the 1088XEL Alternate Atari Motherboard project. The final video goes over how to use the PIC Adapter with the PICKit3. Normally the PICKit3 is an in-system programmer, but with the adapter you have the option of programming those PICs out of system.
As an added bit of triumph I have finally been able to develop an XEL XF551 floppy disk drive board that works. It was harder than I thought, based primarily on some stupid assumptions. I won’t bore you with the details. But the basic version is up and running. This means that you can now install an XF551 capable disk drive in a free drive bay of your PC case and connect it to the board and then the board to the AUX SIO connector on the 1088XEL. Now you can have a true PC case with Atari inside including the ability to use an original 5 1/4 inch floppy drive.
I’m still working on a combo drive that will combine the SDrive and XF551 circuitry with a front bezel control panel for a free 3 1/2″ drive bay. Shouldn’t be too much longer on that.
Over the last few days I’ve been working on a pdf/video combination that would give the 1088XEL DIYers more information on how to program 1088XEL PIC MCUs using a PICKit3 Clone programmer and the MPLAB X IDE software. Finally got most of it done now.
Currently I only have a handmade adapter for 8 and 18 pin PICs, but I should be recieving a new PIC Adapter designed especially to handle all four of the PICS used in the 1088XEL build. Once they are in and I have one assembled, I’ll finish the group of videos with a short one on how to use the PIC adapter with both the JOY2PC and PICKit3 programmers.
In the meantime here are the pdf/video combinations I currently have available.
I don’t usually comment on current events. Usually because it’s all about politics and everyone has an opinion, good bad or indifferent. But why?
Why Charlottesville? Why New Town? Why London…. Why Paris…… Why Syria? Why all the other mass killings in the last century? Why?
Different races, different politics, different political systems, different continents. The one thing in common is that men and women and children are being killed for no other reason than that they are there and available to be used by their murderers to further their own agenda. Has life become so cheap now, that it is a disposable commodity?
Time flies….. I wait impatiently for the official release of the 1088XEL motherboard project by Mytekcontrols from AtariAge.com. Bugs and life seemed to have conspired to delay the early summer release date. He has released the almost final schematic, but cautions that something may yet change after testing what he hopes is the final board version due in the next week or two from EasyEDA board house. That has delayed testing of some boards I have designed, as I want to be sure they will not only work, but work with his board. The SDriveXEL board I can test on my current Atari machines, but the XF551XEL and XF551SDriveXEL versions almost require the combined combinations of 1088XEL and the MicroATX case and power supply to fully test fit and function. I do what I can in the meantime.
In the meantime I have been working on one of the few remaining weaknesses of the 1088XEL. And while a lot can be builtin on the 1088XEL motherboard, you’re always going to need a way to pop in that new/old stock cartridge that you just acquired from Ebay (or the dumpster 🙁 ). A standard miniITX/microATX case just wasn’t built with the need for an external Atari cartridge slot in mind. There’s literally no designed slot for an Atari cartridge. So you have to work with what is there.
For awhile yet most tower cases in the mini-ITX and micro-ATX format still offer at least one 3 1/2″ and one 5 1/4″ external drive bays. Some have two external 5 1/4″ drive bays. Riches…… 🙂 So rather than expecting the Atarian to take a hack saw/Super Dremel cutter to the case to fashion a cartridge slot, I decided to see if I could fit a cartridge slot into the space of a 5 1/4″ drive bay. And then because sometimes the distance between the drive bay and the motherboard connection could be 12″ to 18″, I worked with tf_hh to deal with signal loss on that long a ribbon cable connection. After testing and finding what I think are all the flaws I’ve decided to release the product for sale.
On the 1090XLR front, I am happy to report that Roland Scholz, who developed the prototype PCBridge some years ago has successfully developed the first internal expansion card for the 1090XLR project. The card is a combination dual serial/single parallel port I/O card. Both the 1090XLR and card are still in prototyping mode. tf_hh is also working on a version for the 1090XLR of his SysCheck device. Progress should go much quicker once both have returned from their much deserved vacations this month.
With the imminent release of Mytekcontrol’s 1088XEL project I have decided to reimage the SDrive and XF551 floppy disk drive boards to allow an in case storage medium. Depending on your preference you can purchase an SDriveXEL for floppy disk emulation only or go almost totally retro with a real modernized XF551 floppy disk drive pcb that will drive a compatible 3 1/2″ or 5 1/4″ drive mech. There’s even an option to combine both SDrive and XF551 features on a single 4 layer pcb. For the die-hard DIYer there’s even the option to buy the bare boards and build from the ground up.
Your choice of mini-ITX case will be crucial as not all will have the required disk drive bays. The SDriveXEL option only requires a single 3 1/2″ or 5 1/4″ drive bay with adapter rails. The XF551XEL options all require both a 3 1/2″ and a 5 1/4″ drive bay or (2) 5 1/4″ drive bays in the case. I have listed some compatible cases below. By no means is this list exhaustive, but it gives an idea of what is needed. MicroATX cases that also handle mini-ITX boards are also an option.
Another crucial requirement is an adequate power supply to support the real 3 1/2″ or 5 1/4″ drive mech. I recommend an actual ATX12V standard pc power supply. A 200-300W power supply should be more than sufficient. No need to go higher. I have created a ATX12V adapter board to ease the use with the 1088XEL motherboard. It should work for either a 20 or 24 pin mainboard connector.
In other news….. the 1090XLR project continues in fits and starts. Currently the main prototype board and a serial/parallel I/O plug in board are in testing. I hope to begin testing Ralf David’s ROMDISK board soon as well.
Links to suitable mini-ITX tower cases: (I recommend this webbased pc component supplier due to several years worth of business with them. However they are not the only source for mini-ITX cases by any means.)
Well…… I’ve been restocking pcbs and some parts. Mostly parts that I have to order on Ebay and get from China. Those typically take upto three weeks to arrive. Other parts that I can get state-side within a week I’ll wait until I have an order in. Still have a couple of boards to come in. Namely the final board I need for the RD Eprom burner board kit. Should have that by the end of the week though.
The 1090XLR project is in full swing. I’ve got a website and forum up for it at this address.
The one thing I’ve been planning has not happened yet. I was planning to start the new year with a website redesign. Hasn’t happened yet as you can tell. I’m still working on it. A little at a time. I might have it done for Jan 1 2018. 🙂
It was bound to happen at some point. No person is perfect. In fact most people would agree that if they do most things half right most of the time they are satisfied in their perfection. Well… I guess I am satisfied. 🙂
I was in the process of trying to add additional features for the 1090XLR project to the domain when I veered off course and started doing clean up from past mistakes. I had some orphaned databases and folders that were left over. The orphaned databases were easy to deal with. But then I discovered a scripted uninstall app in the Cpanel of the website domain manager. It was listing several lingering breadcrumbs to failed or abandoned projects. So happy that I had an easier way to clean the site up, I started selecting the orphaned breadcrumbs for deletion/uninstalling. Only the listing was slow in updating and in the process I selected the active app for deletion. WTF???!!!
Four hours later I finally had a functioning website back. Fortunately I had done a brute force backup of the website, late last November and so I was able to use it to get back up. So right after I finish writing this post, I plan to make a backup both on the domain and off-site. I really did have other things to do yesterday and I don’t want to repeat this. Especially since there are so many other things to only get half right most of the time. 🙂