macsonny Posted March 10, 2023 Share Posted March 10, 2023 Today I completed a childhood dream - to own an Indust GT drive for the Atari. Well, two arrived after 3.5 months of waiting and they are both working. A bit of cleaning, greasing, changing Rom and adding a SDRAM Charger, I have two amazing drives. They are a dream to look at. However, one of them is giving me an issue with the display. If you see the attached photo, the units segment (second segment) has the middle bar not working. So the photo should be a number 9. You can see the bottom of the 9 is not lit up. I have reseated the connector cable and squirted a bit of Deoxit around the connector and LED segment display with no luck. Any ideas on what might be the next logical step? Quote Link to comment Share on other sites More sharing options...
Rybags Posted March 10, 2023 Share Posted March 10, 2023 I'd guess it's likely an OTS 7-segment LED so possibly you could just buy a replacement. Quote Link to comment Share on other sites More sharing options...
xrbrevin Posted March 10, 2023 Share Posted March 10, 2023 (edited) they look particularly good examples. many suffer from a slight distortion in the smoked cover and they end up not fitting quite right in one corner but yours seem in good order! get yourself the later ROM and an sram-charger apiece and your minted! you could personalise the track display with an alternative colour - blue or green perhaps? how about amber or white? 🤔 Edited March 10, 2023 by xrbrevin Quote Link to comment Share on other sites More sharing options...
+videofx Posted March 10, 2023 Share Posted March 10, 2023 6 hours ago, macsonny said: However, one of them is giving me an issue with the display. If you see the attached photo, the units segment (second segment) has the middle bar not working. So the photo should be a number 9. You can see the bottom of the 9 is not lit up. I have reseated the connector cable and squirted a bit of Deoxit around the connector and LED segment display with no luck. Any ideas on what might be the next logical step? Welcome to the Indus club! My Indus drive has the exact same problem. I hope we can find a fix! Quote Link to comment Share on other sites More sharing options...
+Larry Posted March 10, 2023 Share Posted March 10, 2023 Question -- did you have to change the rom to use the 64K Sram-charger? I've got a couple of @tf_hh units that I'd like to install. One drive is stock, and one has the Ultra Speed rom by @MrMartian BTW, does anyone know if the original unit used Sram? I presume they did, but Sram was quite expensive then. Quote Link to comment Share on other sites More sharing options...
xrbrevin Posted March 10, 2023 Share Posted March 10, 2023 the original device is LARGE - but looks like DRAM to me: Source: here Jurgen's is a marvel of miniturisation by comparison! not sure about there being a particular ROM requirement but MrMartian did a great job on this and other drives so im pretty sure he would have included it in his upgraded ROM functionality 1 Quote Link to comment Share on other sites More sharing options...
+Larry Posted March 10, 2023 Share Posted March 10, 2023 Yes, sure looks like DRAM. Thanks for the pic and link! Quote Link to comment Share on other sites More sharing options...
Rybags Posted March 10, 2023 Share Posted March 10, 2023 Possibly it uses DRAM since it was made with intention of being able to run CP/M which would need more Ram anyway? Looks like Happy uses SRAM. Generally there was a tipping point where it cost less to do SRAM than DRAM - which would have moved over time. The Vic-20 is the only computer I can think of that uses SRAM. I think the expansion modules also used it. To implement DRAM you need the row/column + refresh logic which adds cost but the tipping point is where it's payed back and savings had thanks to the higher cost of SRAM. Quote Link to comment Share on other sites More sharing options...
+videofx Posted March 10, 2023 Share Posted March 10, 2023 The SRAM Charger requires ROM version 1.2 as that's when Indus added the code to boot the CP/M disk 2 Quote Link to comment Share on other sites More sharing options...
MVladimir Posted March 10, 2023 Share Posted March 10, 2023 (edited) Since the Indus GT has a clone - LDW Super 2000, I have experience with changing damaged indicators. I hope that the panels and indicators on them are the same in both devices. I changed indicators on LDW Super 2000, they had similar damage - some segments did not work. Miniature indicators manufactured by Siemens are installed on the panel, their marking is HD1075R. The datasheet is easy to find online. The indicators were bought on eBay a couple of years ago. At the time of writing this message, they were available for purchase from at least two sellers (the first of them, for example, is here: https://www.ebay.com/itm/363792853538 ). Replacement is not particularly difficult if you have the skills to carefully desolder / solder small-sized radio elements on printed circuit boards. You can use for replacement other color displays - green for example (marking HD1075G) they are from same "family" with common anode but more bright ( about 5 times) Good luck! Edited March 10, 2023 by MVladimir Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted March 10, 2023 Share Posted March 10, 2023 The rom by MrMartian breaks add ons for the Indus. Anything that uses Ramcharger. Indus CP/M, Super syncromesh with track buffering. There is also a indus boot disk that adds USD style speed and format commands like what the rom MrMartian has done. The Indus diagnostic disk. Indus rom 1.2 is the latest. There is one named 1.4 getting around but it is actually V 1.1. 1 Quote Link to comment Share on other sites More sharing options...
macsonny Posted March 11, 2023 Author Share Posted March 11, 2023 2 hours ago, MVladimir said: Since the Indus GT has a clone - LDW Super 2000, I have experience with changing damaged indicators. I hope that the panels and indicators on them are the same in both devices. I changed indicators on LDW Super 2000, they had similar damage - some segments did not work. Miniature indicators manufactured by Siemens are installed on the panel, their marking is HD1075R. The datasheet is easy to find online. The indicators were bought on eBay a couple of years ago. At the time of writing this message, they were available for purchase from at least two sellers (the first of them, for example, is here: https://www.ebay.com/itm/363792853538 ). Replacement is not particularly difficult if you have the skills to carefully desolder / solder small-sized radio elements on printed circuit boards. You can use for replacement other color displays - green for example (marking HD1075G) they are from same "family" with common anode but more bright ( about 5 times) Good luck! Took the unit apart again and checked cable and Deoxit along connector etc to see if it was just a bit of age getting in. Didn't fix the problem so have purchased some replacement segments from eBay. Thanks for the tip - appreciate it. Quote Link to comment Share on other sites More sharing options...
macsonny Posted March 11, 2023 Author Share Posted March 11, 2023 10 hours ago, videofx said: The SRAM Charger requires ROM version 1.2 as that's when Indus added the code to boot the CP/M disk There are a few ROMs floating around and the numbering/mods are a bit confusing. Do you have the ROM 1.2 that works with the SRAM Charger that you can send me or provide a link? Quote Link to comment Share on other sites More sharing options...
+MrFish Posted March 11, 2023 Share Posted March 11, 2023 9 minutes ago, macsonny said: There are a few ROMs floating around and the numbering/mods are a bit confusing. Do you have the ROM 1.2 that works with the SRAM Charger that you can send me or provide a link? Ultimately, it's not all that confusing (aside from the "fake news" 1.4 rom floating around). There's just the 1.1 and 1.2 Indus roms; and then there are two different modified roms: @MrMartian 1.2 ultraspeed, and Richard Andrews 1.2X upgrade rom. You can find the standard Indus 1.2 rom here: Hardware Computerist - Indus GT Quote Link to comment Share on other sites More sharing options...
+MrFish Posted March 11, 2023 Share Posted March 11, 2023 32 minutes ago, MrFish said: ...Richard Andrews 1.2X upgrade rom. Supposedly Richard Andrews also released a 1.3X rom -- that was supposed to just suppress button-press and controller-error beep sounds (in addition to having 1.2X rom features included) -- but I've never seen this one. Quote Link to comment Share on other sites More sharing options...
+Larry Posted March 11, 2023 Share Posted March 11, 2023 14 hours ago, sup8pdct said: The rom by MrMartian breaks add ons for the Indus. Anything that uses Ramcharger. Indus CP/M, Super syncromesh with track buffering. There is also a indus boot disk that adds USD style speed and format commands like what the rom MrMartian has done. The Indus diagnostic disk. Indus rom 1.2 is the latest. There is one named 1.4 getting around but it is actually V 1.1. Good to know -- thanks. That's unfortunate, since one has to choose between the track buffer and USP. Maybe in my case, I'll keep one with USP and put the SRAM-charger in the other. I've always pooh-poohed CP/M, but perhaps I'll give it a look-see. Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted March 11, 2023 Share Posted March 11, 2023 There is a Indus disk That boots like CP/M but it adds USD format command and SIO speed. If you use SDX, you will need to stop any indus commands ie indus.sys and the like as it overwrites whatever was put into indus ram previously. indus doubler.atr 2 Quote Link to comment Share on other sites More sharing options...
macsonny Posted March 14, 2023 Author Share Posted March 14, 2023 Just for reference attached is a photo of the two ROMs I pulled from my two Indus GT drives to replaced with newer ROMs. Note one is an EEPROM and one isn't. Thought people might be interested. Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted March 15, 2023 Share Posted March 15, 2023 Can you dump those ROMs? Quote Link to comment Share on other sites More sharing options...
macsonny Posted March 15, 2023 Author Share Posted March 15, 2023 1 hour ago, kheller2 said: Can you dump those ROMs? Yes. I'll do over the weekend and share with everyone. Quote Link to comment Share on other sites More sharing options...
macsonny Posted March 28, 2023 Author Share Posted March 28, 2023 (edited) Well, I have to say that another Indus GT display gets to fight another day. Replaced both LED segments today and now have a 100% functional Indus GT drive with beautiful display. Fairly easy 30 minute job and using a desolder station makes life very easy I must say. IMG_2152.MOV IMG_2152.mov Edited March 28, 2023 by macsonny 1 Quote Link to comment Share on other sites More sharing options...
macsonny Posted March 28, 2023 Author Share Posted March 28, 2023 On 3/16/2023 at 7:09 AM, kheller2 said: Can you dump those ROMs? ROMs attached - named per picture above. Mean anything to you? 76-9000-002.BIN 76-9000-0003.BIN Quote Link to comment Share on other sites More sharing options...
+Larry Posted March 28, 2023 Share Posted March 28, 2023 Is there any way/utility to check the rom version without opening the drive? (1.1 vs 1.2) Quote Link to comment Share on other sites More sharing options...
+MrFish Posted March 28, 2023 Share Posted March 28, 2023 11 hours ago, macsonny said: ROMs attached - named per picture above. Mean anything to you? 76-9000-002.BIN 4 kB · 0 downloads 76-9000-0003.BIN 4 kB · 0 downloads They match the existing 1.1 (CRC: D125CAAD) and 1.2 (CRC: D8504B4A) ROMs. Quote Link to comment Share on other sites More sharing options...
macsonny Posted March 28, 2023 Author Share Posted March 28, 2023 1 hour ago, MrFish said: They match the existing 1.1 (CRC: D125CAAD) and 1.2 (CRC: D8504B4A) ROMs. Thanks for checking. The 1.3 ROM is the latest and best to use right? Quote Link to comment Share on other sites More sharing options...
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