Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Discussion about old sound cards, MIDI devices and sound related accessories.

Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby shock__ » 2019-3-12 @ 19:34

MJay99 wrote:@shock__: If you need another slot filled, I am happy to join. The forum just doesn't allow me to PM you, yet.
Previous donors only.
Also unless something changes, all slots are full now.
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby matze79 » 2019-3-13 @ 10:14

ah too late :/
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby shock__ » 2019-3-13 @ 12:03

Just briefly and temporarily ... I've decided to go with a run of 15 instead of 10, therefore there are still 3 slots open.
PM me if you're still interested.
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby Anterag » 2019-3-14 @ 13:48

Amazing! Good job! Is the project still going?
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby shock__ » 2019-3-14 @ 15:57

Absolutely ... while I'm slowly getting the feeling that my pace for the project is a bit slow, it's going nicely from a technical standpoint :)

Just ordered some straight SIMM slots for testing.
Also: All slots for the RC run are taken.
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby matze79 » 2019-3-15 @ 12:15

Is there still a Footprint for SOIC/SOJ RAM ?
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby shock__ » 2019-3-15 @ 16:25

Of course :)
I can even include fitting 2x512k RAMs if you want (there's also support for 2x2MB, but my stock on those is quite low).
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby matze79 » 2019-3-16 @ 13:50

That would be nice!!

I still did not figure out why the ROM last time did not work..
they where flashed with right contents.
Maybe it had todo with the defective ultrasound chip ? :D
I will retry this time :)
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby 640K!enough » 2019-3-16 @ 18:12

I don't remember if we discussed this before; what were the symptoms of the ROM not working? What version of IWINIT did you have installed? Did you get any "Found ROM chip" messages when running iwinit -v?

Usually, as long as the ROM is reliable enough to read the header and verify the checksum, it will configure the registers for ROM support. It doesn't do any other validation of the ROM data, though you may get garbage/noise when trying to play MIDI files.
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby matze79 » 2019-3-16 @ 20:43

Simply no playback. except for digital sounds.

I don`t want to solder the dead bug back :) so i can not test output of iwinit
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby shock__ » 2019-3-24 @ 03:32

Just generated the gerbers ... I'll sleep over them for the night and then send them off to fabrication :)
I really hope the drills for the alternative SIMM slots are acceptable to them ... otherwise I might have to look into the generation of slots in eagle.
https://i.imgur.com/9VXixie.jpg

Changelog:
Code: Select all
Transition Prototype 02 -> RC 01

! Changed
+ Added
- Removed

! uncrammed C717, C718, C721, C725
+ added C14 (100nF) to CFILT according to datasheet
! added support for non-PnP mode (3 way pads for R11)
+ added support for straight 72pin SIMM connects (additional drills)
! cleaned up RA20/RA21 configuration (JP4 -> R12, JP5 -> R13A, R13B, R13C)
! integrated X3 into the footprint of U31 (as U31EX)
- removed X3
! renamed X1 and X2 to ISA8 and ISA16 to make their purpose clearer
! renamed JPx to Jx
! renamed gameport/audio connectors to X0-X3
! changed silkscreen explainations to reflect the new naming scheme
- removed support for SOJ sockets for U0/U1
+ Added header "ESP" for potential SPDIF daughterboard
Last edited by shock__ on 2019-3-24 @ 13:54, edited 1 time in total.
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby hard1k » 2019-3-24 @ 10:37

Can't wait :)
Please have a look at my wishlist (hosted at Amibay)
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby matze79 » 2019-3-24 @ 15:21

i also can`t await it :) good i have some parts already in stock :D
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby Rawit » 2019-3-24 @ 19:39

Beautiful, amazing job
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby Synoptic » 2019-3-25 @ 13:24

Looks good !
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby Sev80 » 2019-3-26 @ 00:15

I just got back from business travel and saw the prototype run. I'm probably too late, arent I?
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby shock__ » 2019-3-26 @ 00:51

Yup, I'm afraid so.

But worry not, the full run is planned for the near future and there'll be a considerable timespan before anyone might possibly end up on a catch-up run.
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby foey » 2019-3-26 @ 13:25

shock__ wrote:Yup, I'm afraid so.

But worry not, the full run is planned for the near future and there'll be a considerable timespan before anyone might possibly end up on a catch-up run.


Same - registering interest for the next run :)
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby root42 » 2019-3-26 @ 14:27

Same here. Would love a kit, since I like soldering, if possible.
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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Postby shock__ » 2019-3-26 @ 15:21

root42 wrote:Same here. Would love a kit, since I like soldering, if possible.
Just for future reference, there won't be kits from my side. You'll have to source parts yourself or someone from the community has to offer them (apart from the InterWave IC which comes presoldered with every board).

There are only very minor changes to the bill of materials from Prototype Run #2 (I think 1 additional 10k resistor + the optional ESP header) - I'll update the documentation in time before the PCBs get sent out.
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