21 May 2022, 22:01 | #1 |
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AA3000+ Accelerator
Hey folks. I have a A3660/50 but I’m seeking an accelerator that has accelerator RAM (for speed) and the A3660 does not. What should I be looking for?
I have a Hese built AA3000+. Thanks, Brielle |
22 May 2022, 01:17 | #2 |
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22 May 2022, 03:01 | #3 |
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There is an memory adapter in the works for the A3660. Haven't seen updates recently, though
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22 May 2022, 12:35 | #4 |
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I’ve got two of those A3660 memory boards being built up at the moment. Doubt they’ll work in an AA3000+ though (or 3000 or 4000T) due to scsi / no dma issue. So 4000D only.
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22 May 2022, 12:36 | #5 | |
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Quote:
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23 May 2022, 20:39 | #6 | |
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Quote:
Thanks everyone. As far as A4K vs A3K it’s hard to tell how much if any DMA is supported given it’s half an A4K |
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24 May 2022, 09:04 | #7 |
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24 May 2022, 21:40 | #8 |
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Wow I did not know that! Thanks.
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26 May 2022, 12:52 | #9 | |
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Damn it man....It's everything the A4K should have been when it was released. Onboard SCSI, DSP Sound, PCI, blah blah blah... I'd be leaning more towards Hese's AA3000+ being at least 1.5 x an A3000, maybe 2.0 Half indeed! |
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26 May 2022, 15:42 | #10 | |
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There were similar issues with the CDTV CD-ROM driver where it requested memory for DMA buffers but didn't specify it needed 24-bit DMA capable memory. It was possible to HEXEDIT the driver find the AllocMEM calls and add MEMF_24BITDMA to the call. |
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27 May 2022, 19:17 | #11 |
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You guys are awesome. Thank you.
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29 May 2022, 16:19 | #12 |
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30 May 2022, 08:17 | #13 | |
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I don't know enough about the super dmac to know whether it is possible to do PIO transfers with it. |
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30 May 2022, 10:34 | #14 | |
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That wasn't possible with the CDTV CD-ROM driver |
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31 May 2022, 14:43 | #15 |
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Who has more info on that bit?
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01 June 2022, 08:53 | #16 |
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01 June 2022, 13:14 | #17 | ||
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Quote:
Quote:
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01 June 2022, 15:39 | #18 |
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The proper mask settings. Of course.
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01 June 2022, 18:44 | #19 |
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The HDToolbox mask is IIRC 1-bit for every bit of a 32-bit memory space. So by setting only 24-bits you're guaranteeing that the OS filesystem will never make DMA buffers outside of Chip/Motherboard Fast/ZorroII Fast RAM.
0x00FFFFFC Last edited by alexh; 01 June 2022 at 18:50. |
03 June 2022, 00:01 | #20 |
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First, this thread is off topic here and should be moved into support.hardware. Hopefully, a GM will do that for us.
Second, I hate to rain on the parade here, but if your proposed mask solution would have worked for the X-Calibur, then don't you think someone would have reported this by now? http://amiga.resource.cx/exp/xcalibur The problem with mask is it only affects filesystem transfers. But what about SCSI direct transfers? In particular, reading the RDB from the drive, which of course needs to be done first in order to boot from the drive. Last edited by SpeedGeek; 01 August 2022 at 12:17. |
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