mimo Posted August 25, 2011 Share Posted August 25, 2011 That looks perfect, how do we do that without an xf551 to destroy? Oh,,, you mean the 1200XLD? You can't get a 1050 mech in there, but the 3.5 was 'Made For It" Bob Well, we could make a new run of 1450XL bottoms and the 1400/1450XL cartridge/port side panel, then the 1200XL tops could be used. That would probably be easiest. Although, from a practical usefulness point of view, I'd rather have a custom bottom to house a 130xe and jack in the 1200xl top and keyboard. As long as I'm dreaming, let's cut the right side open to slide a 1050 mech into it. The thought of a 1400xl looking case with built in floppy on the side, 128k etc is very enticing. Quote Link to comment Share on other sites More sharing options...
JohnBuell Posted August 25, 2011 Share Posted August 25, 2011 Oh,,, you mean the 1200XLD? You can't get a 1050 mech in there, but the 3.5 was 'Made For It" Bob Is that one of your famous mods, Bob? Quote Link to comment Share on other sites More sharing options...
Faicuai Posted August 25, 2011 Share Posted August 25, 2011 Oh,,, you mean the 1200XLD? You can't get a 1050 mech in there, but the 3.5 was 'Made For It" Bob ...The workmanship, attention to detail and functionality of the change seems definitely nice. But why not an S-DRIVE/CF-DRIVE instead? (infinitely less cutting/work, minimalisti slots, maybe one or two tiny leds (which could remain conceiled inside just for verification purposes through the vents), etc. F. Quote Link to comment Share on other sites More sharing options...
+Stephen Posted August 25, 2011 Share Posted August 25, 2011 Oh,,, you mean the 1200XLD? You can't get a 1050 mech in there, but the 3.5 was 'Made For It" Bob ...The workmanship, attention to detail and functionality of the change seems definitely nice. But why not an S-DRIVE/CF-DRIVE instead? (infinitely less cutting/work, minimalisti slots, maybe one or two tiny leds (which could remain conceiled inside just for verification purposes through the vents), etc. F. I'm sure when this machine was done, SD cards did not exist Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted August 25, 2011 Share Posted August 25, 2011 Doesn't Bob also have a 1200XL with a built in HD? Quote Link to comment Share on other sites More sharing options...
+bob1200xl Posted August 25, 2011 Share Posted August 25, 2011 A CF card - OK! There is a huge difference between a CF card and a floppy drive. I built a controller with a 2797 that ran directly from the CPU for the 3.5, but it could not keep up with the data transfer from the disk. It would read (really fast) and then 'miss' a sector because of DMA from ANTIC. This forced it to wait until the data came back under the head before it could continue. Not acceptable. The CF card is not rotating media and has a buffer, so we don't get that kind of problem. Works great... Bob Oh,,, you mean the 1200XLD? You can't get a 1050 mech in there, but the 3.5 was 'Made For It" Bob ...The workmanship, attention to detail and functionality of the change seems definitely nice. But why not an S-DRIVE/CF-DRIVE instead? (infinitely less cutting/work, minimalisti slots, maybe one or two tiny leds (which could remain conceiled inside just for verification purposes through the vents), etc. F. 1 Quote Link to comment Share on other sites More sharing options...
+bob1200xl Posted August 25, 2011 Share Posted August 25, 2011 Yes, somewhere... CF is same, just with an IDE/CF adaptor. Doesn't Bob also have a 1200XL with a built in HD? Quote Link to comment Share on other sites More sharing options...
atarifan49 Posted August 26, 2011 Share Posted August 26, 2011 First question: DIN Power Connector. The schematics call for a 7-pin DIN connector for power, the Atari BOM calls for an 8-pin. The motherboard can accommodate either since it has enough holes, but doesn't seem to require the 8th pin. What was used on the factory motherboards? The pictures I've seen are too blurry to make it out. I am specifically wondering about the variant built on the "1450" motherboard (NOT the Tong), since they may have done different things on different boards. Anybody got one that they can check? My first thought was to ask Curt, but I emailed him a week or two ago and haven't heard back. Here are the specs from both a 1400XL and a 1450XLD brick power supply. 1400XL Power Supply Part # CO62023 Power Supply DV-51220W Input: 120V AC-60Hz 0.45A Output: Pin 1, 6 - +5V 1.8A Pin 4 - +12V 0.5A Pin 2 - -5V 0.05A Pin 3, 5, 7 - Ground 1450XLD Power Supply Part # CO62297 Power Supply DV-1450 Input: 120V AC-60Hz 1.1A Output: Pin 1, 6 - +5V 2.8A Pin 4 - +12V 2.0A Pin 2 - -5V 0.5A Pin 3, 5, 7 - Ground I need to search on my other computer to see if I still have a drawing or picture of the pinout that is on the power supply plate. If you notice above the 1400 current specs for +5 and +12 volts are lower because the 1400XL didn't have floppy drives and disk drive circuit board to power. The 1450XL board that Best Electronic sold was almost a exact layout compared to the 1400XL motherboard. Main differences were with the added connector for the disk drive daughter board and disk drive power connector. Regards, Glenn Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted August 26, 2011 Share Posted August 26, 2011 (edited) Ahhh. That's right, the power supply I had for the 1400 was a hacked 520st one. Edited August 26, 2011 by kheller2 Quote Link to comment Share on other sites More sharing options...
Vandal968 Posted August 26, 2011 Author Share Posted August 26, 2011 Ahhh. That's right, the power supply I had for the 1400 was a hacked 520st one. Was the 520st supply a good match? Glenn, thanks for posting that power supply info. cheers, v Quote Link to comment Share on other sites More sharing options...
+wood_jl Posted August 26, 2011 Share Posted August 26, 2011 Oh,,, you mean the 1200XLD? Very impressive, Bob! Quote Link to comment Share on other sites More sharing options...
Vandal968 Posted August 26, 2011 Author Share Posted August 26, 2011 (edited) Curt, can you also send me scans of the films for the modem daughtercard? My original thought was to do it in Eagle, but since I don't know eagle it would be a bit of a PITA. My new thought is to etch the boards using the laser in the lab working from the original films. This will mean that the traces are all original-width, and the more artsy features (like fonts) will be exact. Haven't thought of how to do the silkscreen yet, but I will. Should be more fun than just sending it to a board house. Bob, when do you think you can get those files dumped? My Freddie, (2) PAL's, Blank PROM and some other goodies from Best should be here today. cheers, v Edited August 26, 2011 by Vandal968 Quote Link to comment Share on other sites More sharing options...
+bob1200xl Posted August 26, 2011 Share Posted August 26, 2011 My new, whiz-bang programmer would not read a real 16R4, so I had to drag out my old Dell with the 9860 on it (has to run on ISA...). Kinda nice, actually, came up in DOS 6.22 in about 10 seconds. Had to bring it up here on a floppy... find a USB floppy drive for this hog. Here is the file: U1116R4.ZIP It is not a .zip - the Internet Police would not let me U/L a .JED. It's a JEDEC file. Bob Curt, can you also send me scans of the films for the modem daughtercard? My original thought was to do it in Eagle, but since I don't know eagle it would be a bit of a PITA. My new thought is to etch the boards using the laser in the lab working from the original films. This will mean that the traces are all original-width, and the more artsy features (like fonts) will be exact. Haven't thought of how to do the silkscreen yet, but I will. Should be more fun than just sending it to a board house. Bob, when do you think you can get those files dumped? My Freddie, (2) PAL's, Blank PROM and some other goodies from Best should be here today. cheers, v Quote Link to comment Share on other sites More sharing options...
Vandal968 Posted August 26, 2011 Author Share Posted August 26, 2011 My new, whiz-bang programmer would not read a real 16R4, so I had to drag out my old Dell with the 9860 on it (has to run on ISA...). Kinda nice, actually, came up in DOS 6.22 in about 10 seconds. Had to bring it up here on a floppy... find a USB floppy drive for this hog. Here is the file: AWESOME! Thank you. Now I just need the BIOS dump from U6 and we can make the magic happen. Thanks Bob. v Quote Link to comment Share on other sites More sharing options...
+bob1200xl Posted August 26, 2011 Share Posted August 26, 2011 You didn't ask for that...? It's an INTEL 2732a. Lucky for me, my whiz-bang read it OK. U62732A.ZIP As usual, it is not a ZIP file. It's a .ROM. Bob My new, whiz-bang programmer would not read a real 16R4, so I had to drag out my old Dell with the 9860 on it (has to run on ISA...). Kinda nice, actually, came up in DOS 6.22 in about 10 seconds. Had to bring it up here on a floppy... find a USB floppy drive for this hog. Here is the file: AWESOME! Thank you. Now I just need the BIOS dump from U6 and we can make the magic happen. Thanks Bob. v Quote Link to comment Share on other sites More sharing options...
Vandal968 Posted August 26, 2011 Author Share Posted August 26, 2011 You didn't ask for that...? It's an INTEL 2732a. Lucky for me, my whiz-bang read it OK. U62732A.ZIP As usual, it is not a ZIP file. It's a .ROM. Bob :) :) Thanks Bob! Quote Link to comment Share on other sites More sharing options...
+Stephen Posted August 26, 2011 Share Posted August 26, 2011 Watching your progress is almost as much fun as if I had a board and the parts I have plenty of projects to finish up though, so I'll just be watching this from a distance. 1 Quote Link to comment Share on other sites More sharing options...
Vandal968 Posted August 27, 2011 Author Share Posted August 27, 2011 (edited) PAL A, B & Freddie arrived today and are installed It looks like there is one more chip to find that I somehow overlooked (probably because it lives under the modem daughtercard). U36 6551A SERIAL COMM ASYNC C061690 Hmmmmmmm...... v Edited August 27, 2011 by Vandal968 Quote Link to comment Share on other sites More sharing options...
+Stephen Posted August 27, 2011 Share Posted August 27, 2011 PAL A, B & Freddie arrived today and are installed It looks like there is one more chip to find that I somehow overlooked (probably because it lives under the modem daughtercard). U36 6551A SERIAL COMM ASYNC C061690 Hmmmmmmm...... v Standard UART hopefully? Quote Link to comment Share on other sites More sharing options...
Vandal968 Posted August 27, 2011 Author Share Posted August 27, 2011 Standard UART hopefully? Sounds like it, but its weird because that P/N comes up as a PWM controller at DigiKey. v Quote Link to comment Share on other sites More sharing options...
Vandal968 Posted August 27, 2011 Author Share Posted August 27, 2011 Ok, it's actually a S6551A: http://www.datasheetarchive.com/S6551A-datasheet.html Anyone got an idea for a source? v Quote Link to comment Share on other sites More sharing options...
Bryan Posted August 27, 2011 Share Posted August 27, 2011 WDC makes a replacement: http://www.westerndesigncenter.com/wdc/w65c51n-chip.cfm Quote Link to comment Share on other sites More sharing options...
+David_P Posted August 27, 2011 Share Posted August 27, 2011 (edited) PAL A, B & Freddie arrived today and are installed It looks like there is one more chip to find that I somehow overlooked (probably because it lives under the modem daughtercard). U36 6551A SERIAL COMM ASYNC C061690 Hmmmmmmm...... v Well, Brad Koda has them at $4.00 each: http://www.best-electronics-ca.com/custom-i.htm 6551 CO61690 $4.00 Edited August 27, 2011 by David_P Quote Link to comment Share on other sites More sharing options...
Vandal968 Posted August 27, 2011 Author Share Posted August 27, 2011 Well, Brad Koda has them at $4.00 each: http://www.best-electronics-ca.com/custom-i.htm 6551 CO61690 $4.00 That was on my order of 08/19/2011 and he told me that they didn't have them. I guess I'll try calling them again on Monday and double-check. thank you, c Quote Link to comment Share on other sites More sharing options...
+David_P Posted August 27, 2011 Share Posted August 27, 2011 ...then again, his website isn't always up-to-date, so it's possible he's sold out. Quote Link to comment Share on other sites More sharing options...
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