The AS4C4M4F1 chips are 4M x 4bit FPM chips, and the K4P160411C chips are 4M x 4bit FPM chips as well. The extra pins are for extra CAS lines; the former has 1 CAS line and the latter has 4 lines.
I read some articles about ECC and couldn't find why it requires 2 extra bits per 8 bits of data. For example, this one says 7 extra bits for 32 bits of data and 8 extra bits for 64 bits of data.

dionb wrote:

The Serpent Rider wrote:

Er no, the extra chip only tells you it uses some form of parity. For regular parity you need one bit extra for every 8 bits, for ECC you need two bits extra.

Doesn't look like simple parity - 28-pin chip.

Agreed, but it's that - and not the simple fact that it has one more chip - that potentially makes it ECC. And even then you see some weird parity and ECC setups out there, so I'd want to know what 28p chip that is before making any statements.

Just have a look at the vogonswiki entry on 72 pin SIMMs. I recently updated the page and there are pictures of Parity and ECC (EOS) on it. Some systems like IBM RS/6000 used 40 BIT wide modules to realize ECC by external logic. The shown modules are surely parity mdules and still a good catch, as some systems require them and they are usually hard to find in case you need some.

Well. The modules came out of a tele communication device. Or something like that. You know.... One of them rack mounted PCB's. So they must be of better quality or have some special features. I don't know. Just happy that I have two 32mb modules.

Ordered an AOpen MX3S, an imulse purchase.. Anyone know if it is a good board? The one I got is the non-T, i815E version that does not support Tualatin unfortunately, but a mATX S370 board with AGP and onboard video and audio sounded like a good thing to have.. I have other mATX S370 boards with video but they all lack either an AGP slot or onboard sound..

I've had several of those over the years. They can take CPUs from 300 MHz Celeron to 1 GHZ Pentium III. (I tried a 1.1 GHz Coppermine Celeron and it wasn't recognised.) Maximum RAM is 512 MB RAM. They make nice little late Windows 9x or early Windows XP machines. Integrated video and audio are poor however so you will have to install proper audio and video cards if you want to use it for gaming or watching video.

Errius wrote:

I've had several of those over the years. They can take CPUs from 300 MHz Celeron to 1 GHZ Pentium III. (I tried a 1.1 GHz Coppermine Celeron and it wasn't recognised.) Maximum RAM is 512 MB RAM. They make nice little late Windows 9x or early Windows XP machines. Integrated video and audio are poor however so you will have to install proper audio and video cards if you want to use it for gaming or watching video.

Does the onboard Audio have SB compatibility in pure DOS or Win 9x?

I've never used this board to run DOS programs so can't say. (I do remember many years ago trying to get pure DOS audio to work and giving up without success.) It doesn't have an SB-Link connector either.

Errius wrote:

I've never used this board to run DOS programs so can't say. (I do remember many years ago trying to get pure DOS audio to work and giving up without success.) It doesn't have an SB-Link connector either.

Interesting.. I've seen references to a Sound Blaster Emulation Enable/Disable BIOS option for this board. Dell GX240 also has the same AD1885 chipset and lists SB Emulation alongside AC97 codec. Unfortunately I can't verify this in the AD1885 datasheed. If there really is SB emulation this could be a fairly good board for me. Do you have any of these in a system you can check?

Yes, I have one set up running Windows 98. Let me pull it out of the cupboard.

Edit: OK I've got it set up running Windows 98 SE with onboard sound. Are there any specific games you'd like me to test?

Fantastic! Many, many thanks. *crosses fingers*..

Today I received:
ASUS A7N8X-E Deluxe with accessories in box, cpu and arctic cooling cooler, but need replace caps
ASUS A7N8X-E Deluxe without accessories, but with cpu, ram and good caps
Creative Sound Blaster Audigy 2 ZS
Sapphire Radeon 9800 PRO

Should be fine for Socket A project

Funny. My dad had the A7N8X version, and I corrupted the BIOS since I flashed the wrong version. That was a great board.

Errius wrote:

Yes, I have one set up running Windows 98. Let me pull it out of the cupboard.

Edit: OK I've got it set up running Windows 98 SE with onboard sound. Are there any specific games you'd like me to test?

Well..

Does the bios have option for sound blaster emulation? Does it appear as a device in Win98? Does sound and music in Doom and Duke3D work?

There's no SB option in the BIOS, but games appear to be working with SB/Pro/16 selected. I'm using the wdm.exe SoundMAX driver package in Windows 98 SE. I've tested the following DOS-only games:

Doom II and The Ultimate Doom - Sound is good using General MIDI (port 330) and Sound Blaster (220) options

Grand Theft Auto - Good using Sound Blaster option

Worms - Using Sound Blaster option, sound FX are OK but music stutters for unknown reasons. Music must be disabled or game is unplayable.

Terminal Velocity - Sound FX and music both good using Sound Blaster option

I bought an IBM Thinkpad 600X - it's the 650MHz speedstep model and amazingly the battery still works and it has the original restore CDs & manual 😀

I last owned one of these around 10 years ago when I ran XP on it and had an internal wireless module and an upgraded MMC-II module fitted to put the speed up to I think 700MHz - when I saw this one I couldn't resist - sadly when I got it, all of the rubberised coating had gone disgusting so I spent a while cleaning it off with IPA, which possibly damaged the screen, so one screen later, here we are.

This one will be running Windows 98, or maybe Windows 95, I have restore CDs for both - the sound drivers even have a software wavetable which sounds pretty good, something I had no idea of when I previously owned this

Dell Dimension XPS D333 on ebay and a Seagate Barracuda ST32550W

Grabbed a Samsung 214T for a whopping $25 (holy shit! I paid for a monitor??) Kind of an odd size at 21.4", but a 1600x1200 IPS panel with VGA, DVI, composite & S-video for less than the cost of an expensive lunch out? YESPLZ.

The guy I bought it from worked in a building right near where I work, so I met him there and immediately lugged it back to my office & ingested it into my ridiculous multi-head setup. There it is on the upper right:

To be honest, I'm mostly just doing this to annoy my co-workers right now, as 99% of my work is writing documentation at the moment. But yes, I do use all those displays when I have them. The Samsung will find its way to my home setup eventually (unless I luck into a Dell 2007fp first.)

xjas wrote:

To be honest, I'm mostly just doing this to annoy my co-workers right now, as 99% of my work is writing documentation at the moment. But yes, I do use all those displays when I have them. The Samsung will find its way to my home setup eventually (unless I luck into a Dell 2007fp first.)

I had three monitors until one died. I could happily use six.

Just found this for cheap.
A Wang Alliance 750CD desktop computer.
I think it should have a 386-sx25 CPU in it from what I could find.. but who knows what upgrades have been done.. could have a clip-on 486 upgrade for all I know.
Onboard video is WDC Paradise.

Seller's pics.

The one card is either a Sound Blaster 2.0 or a Sound Blaster Pro 2.

Anybody recognize the card with the single 1/8" jack? I seem to remember seeing a card like that before but can't remember what it was and had no luck searching.
I guess it could even be a simple CD-ROM controller card with an 1/8" output jack for CD audio.

Errius wrote:

There's no SB option in the BIOS, but games appear to be working with SB/Pro/16 selected. I'm using the wdm.exe SoundMAX driver […]
Show full quote

There's no SB option in the BIOS, but games appear to be working with SB/Pro/16 selected. I'm using the wdm.exe SoundMAX driver package in Windows 98 SE. I've tested the following DOS-only games:

Doom II and The Ultimate Doom - Sound is good using General MIDI (port 330) and Sound Blaster (220) options

Grand Theft Auto - Good using Sound Blaster option

Worms - Using Sound Blaster option, sound FX are OK but music stutters for unknown reasons. Music must be disabled or game is unplayable.

Terminal Velocity - Sound FX and music both good using Sound Blaster option

Thank you very much this is fantastic news.

cyclone3d wrote:

I guess it could even be a simple CD-ROM controller card with an 1/8" output jack for CD audio.

I know of CD Interface cards that had dual RCA outs for CD Audio, so this is very likely a variant.

Alternatively, it could be something like an FM radio card with internal routing to the sound card, with the jack being the antenna in.