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.

ah too late 😒

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.

Amazing! Good job! Is the project still going?

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.

Is there still a Footprint for SOIC/SOJ RAM ?

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).

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 ? 😁
I will retry this time 😀

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.

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

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:

1Transition Prototype 02 -> RC 01
2
3! Changed
4+ Added
5- Removed
6
7! uncrammed C717, C718, C721, C725
8+ added C14 (100nF) to CFILT according to datasheet
9! added support for non-PnP mode (3 way pads for R11)
10+ added support for straight 72pin SIMM connects (additional drills)
11! cleaned up RA20/RA21 configuration (JP4 -> R12, JP5 -> R13A, R13B, R13C)
12! integrated X3 into the footprint of U31 (as U31EX)
13- removed X3
14! renamed X1 and X2 to ISA8 and ISA16 to make their purpose clearer
15! renamed JPx to Jx
16! renamed gameport/audio connectors to X0-X3
17! changed silkscreen explainations to reflect the new naming scheme
18- removed support for SOJ sockets for U0/U1 
19+ Added header "ESP" for potential SPDIF daughterboard

Can't wait 😀

i also can`t await it 😀 good i have some parts already in stock 😁

Beautiful, amazing job

Looks good !

I just got back from business travel and saw the prototype run. I'm probably too late, arent I?

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.

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 😀

Same here. Would love a kit, since I like soldering, if possible.

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.