SainT Posted March 23, 2017 Author Share Posted March 23, 2017 I intend to have debugging facilities, including connection to the debug header on the Jag PCB for NMI and memory read / write debug breakpoints. This will be controlled from the USB connection on the board. Ignore my post saint I replied to wrong guy.Ignore my post saint I replied to wrong guy. Yeah, it's still relevant though. Your comment seemed to be saying that the cart I'm working on didn't have any debugging capabilities, hence I assume the "shooting yourself in the foot" comment to do with selling a skunkboard. I just wanted to point out this wasnt the case, infact with the connection from the header (U32 I think?) on the Jag PCB it can be as functional as an Alpine board. This gives connection to IPL2 on the 68k as well as the FC1/2 outputs so its possible to use this as a debugging / monitor interrupt. Coupled with a USB connection to the onboard micro, this does infact allow a nice workable debugging solution from a PC. 5 Quote Link to comment Share on other sites More sharing options...
pirataga Posted March 23, 2017 Share Posted March 23, 2017 Thanks aminor00 for the reception and SainT, you're doing God's work with that flashcart, man, pun intended. I own 27 or 28 consoles (I mean, not 27 jaguars, I have only one of those), I love my collection and I'll be really happy to be able to play all or at least most atari jaguar games on my console 1 Quote Link to comment Share on other sites More sharing options...
EzdineG Posted March 24, 2017 Share Posted March 24, 2017 Saint, as a happy customer of your Lynx SD card I'd like to chime in and let you know you can count on a purchase for one of these too. Thanks for doing what you do. 1 Quote Link to comment Share on other sites More sharing options...
+Gemintronic Posted March 24, 2017 Share Posted March 24, 2017 No. I actually quoted the wrong person dammit. Was trying to quote gemini or whoever. Ignore my post saint I replied to wrong guy. Could just scroll up a bit to see my user name. Unless your memory allocation function overflowed and couldn't handle all 11 characters. Happens to me as well! Quote Link to comment Share on other sites More sharing options...
SainT Posted March 25, 2017 Author Share Posted March 25, 2017 Eurgh, getting very close to having something I can send to the PCB fab house now to actually start doing some physical testing. This is the most complex PCB I've routed (this is only about my 5th proper project, so not surprising I guess), and it does start to drive you slightly mental after a few days at it... 9 Quote Link to comment Share on other sites More sharing options...
pirataga Posted March 25, 2017 Share Posted March 25, 2017 My budget is very limited, but If possible, when the flashcart is finished, I plan to pay you a little extra for you to buy a 12 beer pack as an incentive, SainT 2 Quote Link to comment Share on other sites More sharing options...
Zerosquare Posted March 26, 2017 Share Posted March 26, 2017 (edited) it does start to drive you slightly mental after a few days at it... When you start rearranging brightly-colored lines over and over again in your dreams at night, you know it's time for a break. Are you there yet? Edited March 26, 2017 by Zerosquare 2 Quote Link to comment Share on other sites More sharing options...
AtariDean Posted March 26, 2017 Share Posted March 26, 2017 When you start rearranging brightly-colored lines over and over again in your dreams at night, you know it's time for a break. Are you there yet? [/quote When's the pre order list coming Saint Quote Link to comment Share on other sites More sharing options...
SainT Posted March 26, 2017 Author Share Posted March 26, 2017 I wasn't planning on starting any preorders until I'd got the cart functional, but given the amount of interest I may set something up before then, as it seems people are keen to get their names down as soon as possible. I'll announce here when it's open, anyhow. 8 Quote Link to comment Share on other sites More sharing options...
SainT Posted March 26, 2017 Author Share Posted March 26, 2017 When you start rearranging brightly-colored lines over and over again in your dreams at night, you know it's time for a break. Are you there yet? Lol, not far off! I do go to sleep thinking about routing, Microcontrollers and ic's a lot of the time... 2 Quote Link to comment Share on other sites More sharing options...
doctor_shred Posted March 26, 2017 Share Posted March 26, 2017 I'm certainly very interested in having one of these. Keep up the good work! Quote Link to comment Share on other sites More sharing options...
DEATH Posted March 27, 2017 Share Posted March 27, 2017 Hello, Will the cartridge support the "fastrom" mode (2 cycles)?(If it operates ... I think Zerosquare once said that this mode was bugged, but it did not say why) And the cartridge will be 16 or 32 bit (or ... 8 ? Quote Link to comment Share on other sites More sharing options...
SainT Posted March 28, 2017 Author Share Posted March 28, 2017 Hello, Will the cartridge support the "fastrom" mode (2 cycles)? (If it operates ... I think Zerosquare once said that this mode was bugged, but it did not say why) And the cartridge will be 16 or 32 bit (or ... 8 ? I've no idea on the quicker ROM access at the moment, I've not checked -- that's something that will come out of actual testing. It will support 32, 16 and 8 bit cart bus sizes. 3 Quote Link to comment Share on other sites More sharing options...
pirataga Posted March 28, 2017 Share Posted March 28, 2017 Will I be able to take pictures of my teeth with this flashcart? 1 Quote Link to comment Share on other sites More sharing options...
Hastor Posted March 28, 2017 Share Posted March 28, 2017 Will I be able to take pictures of my teeth with this flashcart? I saw this in my email without the pic and it took me like 15 seconds to remember reading about that thing hah. At first the message was confusing 1 Quote Link to comment Share on other sites More sharing options...
Jagosaurus Posted March 28, 2017 Share Posted March 28, 2017 Dental camera support is a must. Make it happen SainT! 2 Quote Link to comment Share on other sites More sharing options...
Zerosquare Posted March 28, 2017 Share Posted March 28, 2017 Will the cartridge support the "fastrom" mode (2 cycles)? (If it operates ... I think Zerosquare once said that this mode was bugged, but it did not say why) I don't have the details (that was something that was discovered by SCPCD a long time ago, and I don't think he documented it), but as I remember it, the 2-cycle mode has at least one non-obvious bug with no easy hardware workaround. I think it depended on which processor iniated the bus access, and maybe some other conditions as well. It will support 32, 16 and 8 bit cart bus sizes. Nice 32-bit bus width isn't absolutely required and makes the routing more complicated, but if you've got motivation... Quote Link to comment Share on other sites More sharing options...
SainT Posted March 28, 2017 Author Share Posted March 28, 2017 (edited) Nice 32-bit bus width isn't absolutely required and makes the routing more complicated, but if you've got motivation... Yep, routing is already done for that bit. I've taken a shared bus approach with a 32-bit general bus which is switchable between address and data -- this is then sliced by the FPGA. It *should* all work nicely as the external bus access in general is pretty slow. I'm very much looking forward to testing... Just have the extra debug connector to route with yet another level shifter... then I think that's it for this first pass. Edited March 28, 2017 by SainT 5 Quote Link to comment Share on other sites More sharing options...
Sbrann Posted March 28, 2017 Share Posted March 28, 2017 As a very happy owner of your Lynx cartridge and recent owner of a Jaguar (finally) this will be another purchase for me. 1 Quote Link to comment Share on other sites More sharing options...
Zerosquare Posted March 28, 2017 Share Posted March 28, 2017 I've taken a shared bus approach with a 32-bit general bus which is switchable between address and data -- this is then sliced by the FPGA.Clever Quote Link to comment Share on other sites More sharing options...
pirataga Posted March 31, 2017 Share Posted March 31, 2017 "It will support 32, 16 and 8 bit cart bus sizes." Just out of curiosity, what does this means? Quote Link to comment Share on other sites More sharing options...
Jagosaurus Posted March 31, 2017 Share Posted March 31, 2017 "It will support 32, 16 and 8 bit cart bus sizes." Just out of curiosity, what does this means? 8 bit bus size. 9 Quote Link to comment Share on other sites More sharing options...
pirataga Posted March 31, 2017 Share Posted March 31, 2017 I'm confused, I thought THIS was an 8-bit bus, I gotta study some more 1 Quote Link to comment Share on other sites More sharing options...
SainT Posted March 31, 2017 Author Share Posted March 31, 2017 "It will support 32, 16 and 8 bit cart bus sizes." Just out of curiosity, what does this means? The Jag has the ability to access either 32, 16 or 8 bits of data per access to the external bus (the data on the cartridge). A 32 bit cart can transfer data to the jag 4x quicker than an 8bit cart. I'm really not sure what games were what bus size, but you'd expect larger games to have more ROM's and therefore be connected in parallel to the data bus and therefore more likely to be 32bit, but I really haven't done any research on this! 2 Quote Link to comment Share on other sites More sharing options...
pirataga Posted March 31, 2017 Share Posted March 31, 2017 (edited) Oh, I see! By the way,sorry for all the jokes, and thanks for the reply Edited March 31, 2017 by pirataga 2 Quote Link to comment Share on other sites More sharing options...
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