+CyranoJ Posted August 6, 2019 Share Posted August 6, 2019 17 hours ago, rdemming said: I do not know what bank-switch layout Saint used Any of the 6x1MB banks at $800000-$D00000) can point to any of the 16 available banks in the SD "cart rom" - it is glorious 5 1 Quote Link to comment Share on other sites More sharing options...
zezba9000 Posted August 6, 2019 Share Posted August 6, 2019 1 hour ago, CyranoJ said: Any of the 6x1MB banks at $800000-$D00000) can point to any of the 16 available banks in the SD "cart rom" - it is glorious Well thats cool. How fast is accessing that vs main system memory? Quote Link to comment Share on other sites More sharing options...
+CyranoJ Posted August 6, 2019 Share Posted August 6, 2019 8 minutes ago, zezba9000 said: Well thats cool. How fast is accessing that vs main system memory? Same speed as rom Quote Link to comment Share on other sites More sharing options...
Cyprian Posted August 6, 2019 Share Posted August 6, 2019 5 hours ago, CyranoJ said: Same speed as rom the only difference is that RAM has 64bit access and cart 32bit Quote Link to comment Share on other sites More sharing options...
SCPCD Posted August 6, 2019 Share Posted August 6, 2019 and RAM is 2 cycle and ROM is 5 cycles min. Quote Link to comment Share on other sites More sharing options...
SainT Posted August 6, 2019 Author Share Posted August 6, 2019 1 hour ago, SCPCD said: and RAM is 2 cycle and ROM is 5 cycles min. ROM is always 10 cycle for JagSD use (ie. standard commercial game spec). 1 Quote Link to comment Share on other sites More sharing options...
swapd0 Posted August 6, 2019 Share Posted August 6, 2019 7 hours ago, SainT said: ROM is always 10 cycle for JagSD use (ie. standard commercial game spec). This is a hardware constraint or it can be lowered by software?, maybe it can be nice to have 1 cycle access time and put textures there instead of RAM. Quote Link to comment Share on other sites More sharing options...
Zerosquare Posted August 7, 2019 Share Posted August 7, 2019 1 cycle isn't possible ; the speeds supported by the hardware are 2, 5, 6, 8 and 10 cycles. And 2 cycles is partially broken. Support for 5 cycles would be nice to give a speed boost to JagSD-only games. 2 Quote Link to comment Share on other sites More sharing options...
swapd0 Posted August 7, 2019 Share Posted August 7, 2019 (edited) 3 hours ago, Zerosquare said: 1 cycle isn't possible ; the speeds supported by the hardware are 2, 5, 6, 8 and 10 cycles. And 2 cycles is partially broken. Support for 5 cycles would be nice to give a speed boost to JagSD-only games. OMG, do you mean that the Jaguar has hardware bugs? ? Edited August 7, 2019 by swapd0 1 Quote Link to comment Share on other sites More sharing options...
42bs Posted August 7, 2019 Share Posted August 7, 2019 6 minutes ago, swapd0 said: OMG, do you mean that the Jaguar has hardware bugs? ? Nope! 2 Quote Link to comment Share on other sites More sharing options...
SainT Posted August 7, 2019 Author Share Posted August 7, 2019 8 hours ago, Zerosquare said: 1 cycle isn't possible ; the speeds supported by the hardware are 2, 5, 6, 8 and 10 cycles. And 2 cycles is partially broken. Support for 5 cycles would be nice to give a speed boost to JagSD-only games. I don't believe it's possible, its pushing it a bit at 10. I'm using SDRAM, so there is some latency in random reads -- it's better suited for burst reads. Plus you have the refresh cycles to take into account for latency and the fact memory access is asynchronous, so there's no waiting for the cart ROM to return the correct value. You either get it there in time, or everything dies. 3 Quote Link to comment Share on other sites More sharing options...
DEATH Posted August 8, 2019 Share Posted August 8, 2019 12 hours ago, SainT said: I don't believe it's possible, its pushing it a bit at 10. I'm using SDRAM, so there is some latency in random reads -- it's better suited for burst reads. Plus you have the refresh cycles to take into account for latency and the fact memory access is asynchronous, so there's no waiting for the cart ROM to return the correct value. You either get it there in time, or everything dies. Oh, the JagSD does not support 5 cycles rom access ? You did not test it? Quote Link to comment Share on other sites More sharing options...
Zerosquare Posted August 8, 2019 Share Posted August 8, 2019 21 hours ago, SainT said: I don't believe it's possible, its pushing it a bit at 10. I'm using SDRAM, so there is some latency in random reads -- it's better suited for burst reads. Plus you have the refresh cycles to take into account for latency and the fact memory access is asynchronous, so there's no waiting for the cart ROM to return the correct value. You either get it there in time, or everything dies. That's unacceptable. I demand to get my money back! Wait... 1 Quote Link to comment Share on other sites More sharing options...
+CyranoJ Posted August 8, 2019 Share Posted August 8, 2019 9 hours ago, DEATH said: Oh, the JagSD does not support 5 cycles rom access ? You did not test it? Everything we have tested (and, believe me, that is a LOT) has worked. 4 Quote Link to comment Share on other sites More sharing options...
SainT Posted August 8, 2019 Author Share Posted August 8, 2019 7 minutes ago, CyranoJ said: Everything we have tested (and, believe me, that is a LOT) has worked. Yes, it's my old mantra of supporting the software which exists, not the software that doesn't. It really helps to cut down the workload! 7 1 Quote Link to comment Share on other sites More sharing options...
+xucaen Posted August 8, 2019 Share Posted August 8, 2019 11 hours ago, SainT said: Yes, it's my old mantra of supporting the software which exists, not the software that doesn't. It really helps to cut down the workload! It's like I was always told as a software developer - solve the problems you have, not the problems you don't have. 4 Quote Link to comment Share on other sites More sharing options...
phoenixdownita Posted August 9, 2019 Share Posted August 9, 2019 I think it is called YAGNI 2 Quote Link to comment Share on other sites More sharing options...
+CyranoJ Posted August 10, 2019 Share Posted August 10, 2019 A much enhanced version shall be waiting for you to test your shiney new SD cart with 320x200x4bpp + 21.9Khz 16 bit ADPCM audio Video shows upload speed over USB 12 1 1 Quote Link to comment Share on other sites More sharing options...
LianneJaguar64 Posted August 10, 2019 Share Posted August 10, 2019 Whoa, not reading through 97 pages... Can I get the cliffs notes version? ? Quote Link to comment Share on other sites More sharing options...
+madman Posted August 10, 2019 Share Posted August 10, 2019 15 minutes ago, LianneJaguar64 said: Whoa, not reading through 97 pages... Can I get the cliffs notes version? ? Sure. There's an upcoming Jaguar SD cartridge. 6 6 Quote Link to comment Share on other sites More sharing options...
flip Posted August 10, 2019 Share Posted August 10, 2019 3 hours ago, madman said: Sure. There's an upcoming Jaguar SD cartridge. And there's no pre-order list, nor will there be one. 2 Quote Link to comment Share on other sites More sharing options...
SainT Posted August 10, 2019 Author Share Posted August 10, 2019 11 minutes ago, flip said: And there's no pre-order list, nor will there be one. Well, not quite true! I’ll be opening orders when I have the first load ready to ship, then any orders which can’t be fulfilled by the initial stock will be pre-orders to be fulfilled. I’m trying my hardest to keep the backlog as small as possible and keep orders fresh with the JagSD. 7 Quote Link to comment Share on other sites More sharing options...
+Mitch Posted August 11, 2019 Share Posted August 11, 2019 So, any hints on when you will be ready to ship. Mitch Quote Link to comment Share on other sites More sharing options...
Gummy Bear Posted August 11, 2019 Share Posted August 11, 2019 4 Quote Link to comment Share on other sites More sharing options...
Atari030 Posted August 14, 2019 Share Posted August 14, 2019 On 8/10/2019 at 11:53 PM, CyranoJ said: A much enhanced version shall be waiting for you to test your shiney new SD cart with 320x200x4bpp + 21.9Khz 16 bit ADPCM audio Video shows upload speed over USB I have to quote that so I don't have to go back a page. Unleash the Jag. I don't think I've tracked a thread on Atariage that has got me so excited before. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.