+Nezgar Posted February 12, 2018 Share Posted February 12, 2018 Oh, I figured 'HCD' is just further evidence that it was an in-house prototype of the 'Home Computer Division'. Considering the other hacks to that PCB, I'm guessing it's likely the ROM is a normal production OS if they just wanted to fix up the drive to make it functionally the same as a production drive. Quote Link to comment Share on other sites More sharing options...
DavidMil Posted February 12, 2018 Author Share Posted February 12, 2018 My wife informed me that we have doctors appointments tomorrow so I figured I'd better do this tonight. So, here is the Dump of the Tandon ROM chip (2732G). David 1050 ROM Chip.BIN 3 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted February 12, 2018 Share Posted February 12, 2018 (edited) Well, if your EPROM hasn't suffered from bit loss, it's a new one to me. Comparing to dumps I've acquired of Rev J, K, L, and WST, your ROM is least different from Rev J, in four places: File1=your 1050 ROM Chip.BIN File2=1050-revJ.rom Compare error at OFFSET 0 file1 = FF 11111111 file2 = FB 11111011 Compare error at OFFSET 3EA file1 = EA 11101010 file2 = 46 01000110 Compare error at OFFSET 3EB file1 = EA 11101010 file2 = B6 10110110 Compare error at OFFSET FF9 file1 = 48 01001000 file2 = 4A 01001010 EPROM's erase to FF's (1's), so I would think that if it is suffering from long term bit loss, we'd see random 0's change to 1's. This fits offset 0, but not the other three offsets. Edited February 12, 2018 by Nezgar Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted February 12, 2018 Share Posted February 12, 2018 (edited) Oh. EA's are 650x NOP's - maybe disabled checksum for development? This post supports the double NOP disabling checksum, done in the WST ROM, and those bytes compare same with your ROM.... http://atariage.com/forums/topic/156462-1050-roms/?p=3581252 Comparing WSTR5 not support WD2797 no checksum.BIN and 1050 ROM Chip-from prototype board.BIN... Compare error at OFFSET 0 file1 = F3 file2 = FF Compare error at OFFSET 1 file1 = E7 file2 = F7 Compare error at OFFSET 2 file1 = CF file2 = EF Compare error at OFFSET 3 file1 = DB file2 = DF Compare error at OFFSET 4 file1 = 46 file2 = F6 Compare error at OFFSET 1D file1 = 28 file2 = 38 Compare error at OFFSET 27 file1 = 28 file2 = 38 Compare error at OFFSET 29 file1 = 73 file2 = 71 Compare error at OFFSET 3C file1 = 60 file2 = 5E Compare error at OFFSET 4D file1 = 4F file2 = 4D 10 mismatches - ending compare Edited February 12, 2018 by Nezgar 1 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted February 12, 2018 Share Posted February 12, 2018 Before I start a new thread to ask - does anyone have a scanned version of the original install documentation for the ICD US Doubler? I've only found OCR'd/retyped versions online. Surprising since there's scanned docs for many other ICD products. Or maybe original docs are rare since it was so heavily pirated... There is one on eBay right now, but it's just a photocopy, not the usual pink cover: https://www.ebay.com/itm/302439408036 Quote Link to comment Share on other sites More sharing options...
1050 Posted February 12, 2018 Share Posted February 12, 2018 Can't make heads or tails of exactly what you want, a color correct photocopy? OCR, typed is out for some mysterious reason too. ICD did put it in the SDCS manual, it's all there except the cover art. Don't recall seeing it as a standalone manual but why do you need one anyway? http://www.atarimania.com/documents/atari-8bit-spartados-construction-set-owners-manual.pdf Minor point, all of DavidMil's posted rom files start with FF when that byte is not really there. I think it might be his outdated burner/reader has a bug in it? It makes the first byte always FF. Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted February 12, 2018 Share Posted February 12, 2018 ICD did put it in the SDCS manual, it's all there except the cover art. Don't recall seeing it as a standalone manual but why do you need one anyway? http://www.atarimania.com/documents/atari-8bit-spartados-construction-set-owners-manual.pdf The purist in me thought it would be nice to include a printout with an upgraded 1050. Otherwise yeah, the content would be the same as the SDCS manual, but that eBay auction is evidence they did make a standalone manual at one point. 1 Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted February 13, 2018 Share Posted February 13, 2018 Logical thing is to let DavidMil know to re-post the roms with the pre-pended ff omitted... or snip it off your self and post them.. Quote Link to comment Share on other sites More sharing options...
1050 Posted February 13, 2018 Share Posted February 13, 2018 Well it's not a confirmed fact and it might be operator error as in he should be entering the read section via a different means perhaps. Don't know for sure, but I have stated that I had something else other than FF for first byte and Nezgar reports the same thing. Too odd, so I post a suspicion I'm having. I'm sure David's still about and might investigate some. Not prepended data either just altered to be FF for first byte and pretty consistent about that so far. I consider it a minor point still, at least it's being discussed. My PC burner for example will try to use the last file of record loaded until I take steps to load an empty instead which then forces it to read the actual data that is there. Cursor might be situated upon byte #0 and one should arrow up or otherwise take pains to not step on it. But I don't know his software, I just know mine. 1 Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted February 13, 2018 Share Posted February 13, 2018 exactly, we all see it, we know it's not correct. We personally don't need to know the reason. He should investigate to find a fix. The posted roms should be replaced because the average bear will just burn the rom and it can be a problem, as they won't more than likely know what to do with it. It might not even be in this thread, or on AtariAge by the time they possess them. I forget what I used to have to pad on one of the old burners. but it's something I remember having to do at one time in my life. 1 Quote Link to comment Share on other sites More sharing options...
DavidMil Posted February 14, 2018 Author Share Posted February 14, 2018 I will look into it. Also I can dump them with another burner to see what they look like. David 2 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted February 25, 2018 Share Posted February 25, 2018 The 3241 in the beginning can be changed to 7685 to make it a D5: - D8: USD. I was curious... I modified and burned a USD ROM with '8291' and it indeed works as either Drive 1, 2, 8, or 9. I confirmed Drive 9 works with SpartaDOS X, SpartaDOS 3.2g, RealDOS 3, and I presume SpartaDOS 3.3 (Precursor to RealDOS). Very neat. I wonder what other DOS's may work with a D9: on SIO. I also noticed these numbers are present in the beginning of the Stock 1050 ROM's too, so must be an easy edit there too. Didn't know this was a feature carried over from there. 3 Quote Link to comment Share on other sites More sharing options...
1050 Posted February 26, 2018 Share Posted February 26, 2018 D9: works on MyDOS but only as a ramdisk set up to be that number. You don't get it shown on the menu either, but it's there just the same. The ramdisk driver of MyDOS cheats the SIO such that there is never a call to SIO code for ramdisk work anyway. And this why VTOCFIX doesn't work on the ramdisk no matter what number it is. Nicely done there. Will put that one in the memory banks for sure. 1 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted March 21, 2018 Share Posted March 21, 2018 (edited) After correcting the 1st byte of DavidMil's "ICD.BIN" from FF to 1D I found it now compares 100% with the "UsDoubler_ok.bin" on pigwa - interesting this ROM has actually been found in the wild, dated October 1996 on pigwahttp://ftp.pigwa.net/stuff/collections/nir_dary_cds/ROMS/ROMS_HW/1050%20Upgrades/UsDoubler_ok.bin Not sure if that 1 byte is actually used for anything, or have any relation to the incompatible stepping previously observed. Too late to burn and test for tonight. Also interesting are the "Doubler_err.epr" and "Usdblr_err.rom" files on pigwa which compare 100% against each other, and also 100% against the common US Doubler ROM.. so they are not actually errored/corrupted at all...http://ftp.pigwa.net/stuff/collections/nir_dary_cds/ROMS/ROMS_HW/1050%20Upgrades/Doubler_err.eprhttp://ftp.pigwa.net/stuff/collections/nir_dary_cds/ROMS/ROMS_HW/1050%20Upgrades/USDOUBLE/Usdblr_err.rom So down to just 10 mismatches in the ROM now... Comparing usdblr.rom (Known good, common ROM) and ICD_1Dfix.BIN (Fixed FF to 1D from DavidMil)... Compare error at OFFSET 1A file1 = 13 file2 = D6 Compare error at OFFSET 1B file1 = F9 file2 = F8 Compare error at OFFSET 43 file1 = 2 file2 = E6 Compare error at OFFSET 44 file1 = F2 file2 = F1 Compare error at OFFSET 46 file1 = 30 file2 = 14 Compare error at OFFSET 49 file1 = D9 file2 = BD Compare error at OFFSET 4C file1 = E3 file2 = C7 Compare error at OFFSET 4E file1 = 2C file2 = 20 Compare error at OFFSET 4F file1 = 0 file2 = D Compare error at OFFSET 50 file1 = 4 file2 = F4 10 mismatches - ending compare Edited March 21, 2018 by Nezgar 1 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted March 23, 2018 Share Posted March 23, 2018 (edited) Success! burned the fixed ICD.BIN (aka UsDoubler_ok.bin on pigwa) and this ROM's seek times are about 2x faster than a standard 1050, the other USDoubler ROM I'm familiar with, or even the Happy 1050! Seeks perform very similarly to the WST stock ROM and SPEEDY. So it seems at least the 1st byte of this USDoubler ROM before the drive number assignment bytes is related to seek/stepper timings, and possibly those other 10 bytes as well. My previous tests with the first byte as 'FF' being a higher number than '1D' must have been setting the speed too fast. See it in action here with a Tandon mech: So the question remains.... if this was actually an official revision of ICD code, or the result of a 3rd party hacking/patching it. PS: You may notice the little screws i stuck into the back of the stepper slider... The ones to the right of the rail work well to 'silence' the noisy seeking in this particular Tandon mechanism. Edited March 23, 2018 by Nezgar 2 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted March 25, 2018 Share Posted March 25, 2018 In my further adventures of manipulating the 1050 Stock and USDoubler ROM drive number bytes, I have now confirmed that drive 10 through 15 work, at least in SpartaDOS X 4.48. They are usable as drives J: K: L: M: N: and O:. This wasn't a huge surprise to me since those drives show in AspeQt/RespeQt too, but neat to see a real drive supporting this. Because the nature of EPROM's is that you can still turn 1's to 0's after initial programming, some drive numbers can be changed to certain lower drive numbers without needing to erase whole the EPROM, so I made a table to see the possibilities. There might be some errors in this... Maybe handy for something/someone else in the future. 4 Quote Link to comment Share on other sites More sharing options...
xrbrevin Posted April 2, 2018 Share Posted April 2, 2018 Hi, Thanks for taking the time to do this research. I burned the "UsDoubler_ok.bin" to both my Tandon USD drives and they work great! The seek times are much better than the ROM I used previously All the best Nick 1 Quote Link to comment Share on other sites More sharing options...
tjlazer Posted April 2, 2018 Share Posted April 2, 2018 (edited) I have an official ICD US doubler ROM encased in a plastic container, are these the latest versions I wonder? I will see if I can dump it. Edited April 2, 2018 by tjlazer 1 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted April 2, 2018 Share Posted April 2, 2018 (edited) I have an official ICD US doubler ROM encased in a plastic container, are these the latest versions I wonder? I will see if I can dump it. Check which of the 2 jumper configurations you have above U10 on your 1050 mainboard, If you have JP2 & JP4 jumpered, you can simply remove the ICD ROM at U10, and swap it with a 2732 EPROM programmed with this replacement code. I suspect most of the original USDoubler ROM's were really EPROMs inside, or at least made pin-compatible. There is mention in the manual of being able to send in for a different 'U10' chip that works with the JP1/JP3 configuration (Mask ROM) for those that didn't want to solder. Edited April 2, 2018 by Nezgar 2 Quote Link to comment Share on other sites More sharing options...
BillC Posted April 3, 2018 Share Posted April 3, 2018 Check which of the 2 jumper configurations you have above U10 on your 1050 mainboard, If you have JP2 & JP4 jumpered, you can simply remove the ICD ROM at U10, and swap it with a 2732 EPROM programmed with this replacement code. I suspect most of the original USDoubler ROM's were really EPROMs inside, or at least made pin-compatible. There is mention in the manual of being able to send in for a different 'U10' chip that works with the JP1/JP3 configuration (Mask ROM) for those that didn't want to solder. The USDoubler ROM chips for the 'Mask ROM' jumper position are 2532 EPROMs, they are pin compatible with the original 2332 ROM chips. Atari seems to have made the 1050 drives flexible enough to take either, probably in case they needed to introduce a newer firmware before updated mask ROMs were available. They did similar on some verions of the 600XL PCB as well, having 2 jumpers which allow the BASIC chip to be either a 24-pin ROM or a 28-pin 2764 compatible EPROM. 2 Quote Link to comment Share on other sites More sharing options...
Kyle22 Posted April 3, 2018 Share Posted April 3, 2018 I have an official ICD US doubler ROM encased in a plastic container, are these the latest versions I wonder? I will see if I can dump it. Are you sure it's the ROM and not the stacked 6810's? The 'plastic container' you mention sounds like ICD's 'hybrid module' or whatever they call the stacked 6810's. Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted April 3, 2018 Share Posted April 3, 2018 Are you sure it's the ROM and not the stacked 6810's? The 'plastic container' you mention sounds like ICD's 'hybrid module' or whatever they call the stacked 6810's. Heh, yeah in the USD manual it's merely called "the new U8 (the larger module)" or "hybrid 24 pin module (U8)". That would stay, and only the U10 would be swapped with the new ROM. The manual is a bit funny that they try to keep the 2 modules mysterious by not just calling them RAM and ROM But I guess its also simplest to refer to them that way for installation purposes. Quote Link to comment Share on other sites More sharing options...
tjlazer Posted April 3, 2018 Share Posted April 3, 2018 Are you sure it's the ROM and not the stacked 6810's? The 'plastic container' you mention sounds like ICD's 'hybrid module' or whatever they call the stacked 6810's. That may be the case. Was there a ROM also provided? I think I only have this stacked ram module. I'll check tonight. Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted April 3, 2018 Share Posted April 3, 2018 That may be the case. Was there a ROM also provided? I think I only have this stacked ram module. I'll check tonight. Yes, the upgrade consists of 2 components: the ROM in the U10 socket, and the RAM module in the U8 socket. Quote Link to comment Share on other sites More sharing options...
tjlazer Posted April 4, 2018 Share Posted April 4, 2018 Found my kit. Need to install it now. Should I copy the ROM? 1 Quote Link to comment Share on other sites More sharing options...
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