Re: Converted registered SDRAM
Posted on 2024-04-12, 20:53
I'll add some 0201 resistors on future order... 😀
Re: Converted registered SDRAM
Posted on 2024-04-12, 04:11
Just adding some photos... Filename rsdram1.jpg File size 164.04 KiB Views 154 views Filename rsdram2.jpg File size 162.42 KiB Views 154 views Filename rsdram3.jpg File size 191.32 KiB Views 154 views
Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards
Posted on 2024-04-12, 01:10
Unfortunatelly I have my test setup disassembled and left at work, maybe during next week I could capture some scopes of working LDRQ. Or could Rasteri? I would expect some narrow low pulses ~1/10-1us with long period of 10-100ms during normal operation. In a test program it may be just a single low …
Dell DH1485E-S1 1,5kW power supply from disk array pinout?
Posted on 2024-04-11, 20:02
Hi, please anyone would know the pinout of this Dell PSU class? I couldn't find it yet. It seems to be used in disk arrays like SC7020, SC5020, SCV3020... Here's a photo of the connector: https://i.ebayimg.com/images/g/4OgAAOSw4xVkJ5RD/s-l1600.jpg After connecting power cord a green LED light on and …
Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards
Posted on 2024-04-11, 03:09
Proper PCB design tools like Altium has all necessary functions to make good DDR3, etc. routing (impedance calculator for defined PCB stackup, diff pair routing, signal length matching...) it's not too rocket science, just need to follow some high-speed signal routing guidelines that are freely …
Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards
Posted on 2024-04-10, 22:07
They don't need to reverse anything there are floating a lot of leaked MB schematics, e.g. hundreds from Gigabyte 😀 Yes, you can try to ask them first but in case of this low price it makes sense to desolder the PCH rather paying them more, as a bonus you'll have spare parts for repair 😀
Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards
Posted on 2024-04-10, 20:40
Who is the MB manufacturer? If there's even DMA-less SuperIO chip I doubt that some chinese designers would generously route LDRQ from PCH to nowhere for you... Do you have any chance to meet someone working with X-ray machine? It could give a fast answer whats under the ball 😀
Re: Converted registered SDRAM
Posted on 2024-04-10, 20:21
That sounds right. Rotating both 0-ohm resistors seems to pick 3 different settings, I think for clock phase, one of which will give you the best timings. Clock signal comes in on one link, through a via, I think to a loop on an internal layer, through a via to the other side of the stick, through …
Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards
Posted on 2024-04-10, 02:55
I don't have much experiences with modding modern AMI BIOS. My Gigabyte use old-style Award BIOS so the key tool I use is CBROM to add/remove/extract various modules. There was also MODBIN tool for modding SETUP entries but it's too old for newer Award BIOSes. I remeber I also had some "hot" moments …
Re: Converted registered SDRAM
Posted on 2024-04-09, 20:37
Yes the solder blob can be easily sucked with a litz wire and I'll be back in original state within a minute when needed 😀 UPDATE: there are 2 "T" structures, each on one side. Both contains 0-ohm resistor...
Re: Converted registered SDRAM
Posted on 2024-04-09, 15:42
In my case it looked rather like a capacitor? not sure now, later I take some photo and measure what the component is...
Re: Converted registered SDRAM
Posted on 2024-04-09, 15:01
I currently don't have any server MB that use registered SDRAM so I don't care much but I agree that it would be cleaner to solder some 0402 or 0201 tiny resistor instead of solder blob, maybe later, I just marked a note on a module sticker... BTW there's also PLL circuit in this modules and I seen …
Re: Converted registered SDRAM
Posted on 2024-04-09, 01:47
Thanks for this thread! I just digged out 2 huge registered DIMM modules IBM MT18LSDT6472G-133B1 (looks similar to those on 1st post) that was lying there spare for years without usage. So I did a simple mod by adding a solder blob just on the SMD invertor chip between input pin (REGE) and neighbour …
Re: DOS driver for RetroWave OPL3
Posted on 2024-04-07, 15:10
Hi, I just tested USBDDOS(P) driver (the latest release Releases 4 1.0 bugfix2 from Github) on my Gigabyte P67 (it has all USB via onboard intel EHCI) and it just hang the system, write no line of message. Only if I call it with /? it prints help info but even if I use some non-existing parameter …
Re: SBEMU: Sound Blaster emulation on AC97
Posted on 2024-04-07, 14:08
The new DPMI is built with openwatcom, which generates much more optimized code and in opensource maintenance. porting CWSDPMI to watcom is another option but still need critical modification. while I'm using the part of code from USBDDOS which has a local DPMI with core functions implemented, i.e. …
Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards
Posted on 2024-04-07, 13:02
AFAK modern boards cannot run without ME and if it was fully removed or corrupted this cause system shutdown. This is why someone created MEdisabler that remove/disable almost ME features but leave some criticals.that prevent the shutdown. But in normal case the BIOS modding tools.shouldn't touch …
Re: Yamaha YMF7x4 Guide
Posted on 2024-04-07, 03:34
Did you try my YMF7XX utility that can dump and set YMF registers? This way you can also set the mixer, it's just not clear what mixer register is for what input, need to try out. Probably various soundcard manuf. might rourted YMF inputs differently... I'm also preparing new version of YMF7XX that …
Re: SBEMU: Sound Blaster emulation on AC97
Posted on 2024-04-05, 04:21
Oh I understand, I'm also poor in reading huge ASM projects and rather write in C. The CWSDPMI is written in Borland C probably with some inline ASM code. SBEMU sound output level is just fine on SB Audigy but on VSBHDA is a magnitude or so lower. It was explained it's due to mixing code. BTW I see …
Re: SBEMU: Sound Blaster emulation on AC97
Posted on 2024-04-04, 22:51
Yes, I tried myself but didn't get in hands anything newer. Working laptop has mobile RTX2000 but it's UEFI only machine, no longer possible boot DOS on it. 🙁
Re: Yamaha YMF7x4 Guide
Posted on 2024-04-04, 22:47
If you have a CD-ROM with both outputs then both should send the audio signal when playing without any special setting, it should work out of the box. In the past I had Teac CD-RW with digital out connected to SB-Live CD digital input and it worked fine, SB mixer had separate volume control for …
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