Re: Acculogic RAMpAT! - Anybody with a working card here?
Posted on 2020-03-07, 10:16
There's a pretty good chance the battery in that Dallas module is dead and with lack of settings that can be retained it may malfunction like that.
Re: 486 CPU upgrade
Posted on 2020-03-07, 00:56
It doesn't seem this board has a voltage regulator (usually a 3 legged part attached to a heatsink) so 3V CPUs aren't supported. Dionb has presented options to explore.
Re: 486 CPU upgrade
Posted on 2020-03-06, 23:59
Take a photo of the entire board, if no voltage regulator is visible anywhere the board is likely 5V only.
Re: Micro ATX 486 - what's the degree of interest?
Posted on 2020-03-05, 19:32
FPGA based motherboards are in my todo list, hard part is the BIOS that I have actually slowly began working on.
Re: Let's make some memories (SIMMs)
Posted on 2020-03-05, 10:12
This should work fine. I recently made my own 4MB SIMMs too
Re: Any known issues running Windows XP 32 bit with 8 GB RAM installed?
Posted on 2020-03-04, 17:10
I run 8GB with PAE hack and a set of new drivers for some internally supported hardware classes and things work without problems on the target machine (Thinkpad X200t). I used to have issues with USB webcams and storage devices prior to finding a version of the PAE stuff with updated base drivers.
Re: PCI sound cards and Chipsets from various manufacturers...
Posted on 2020-03-02, 22:24
>Tiido, thanks for explanation IO range bridging limitations. But BTW AFAIK remmeber well it was you who successfully run some SB card via Fintek LPC2ISA bridge on some P41 or so like MB... I just want to give it a try, so prototype a quck and dirty prototype board with less effort and mimimum …
Re: Advice on making a stable VLB build
Posted on 2020-03-02, 21:40
That particular ARK Logic card puts a higher capacitance on the bus, slowing it town to a level you need to increase timings to reach stability. FIC made some VIA based boards with PCI, VLB and onboard IDE and other peripherals.
Re: Advice on making a stable VLB build
Posted on 2020-03-02, 21:03
AMD CPUs want 3.45V, intel ones 3.3V, Cyrix ones 3.6V, and many motherboards have 3.45V as their 3V rail for the CPU since it is within spec of all 3. Overclocking I have no explanation for, I just like 50MHz and big heatsinks 🤣
Re: PCI sound cards and Chipsets from various manufacturers...
Posted on 2020-03-02, 18:52
All chipsets I have seen allow to pass only 4x 256 port ranges aligned to 256 boundaries and care must be taken not to forward any IO range used by a PCI/AGP/PCI-E or some onboard device or they stop working so that means use use 3 ranges for 200...2FF for SB stuff, bits in 300...33F range for MPU, …
Re: PCI sound cards and Chipsets from various manufacturers...
Posted on 2020-03-02, 17:22
While LPC could be answer to all the problems, chipset limitations make it impossible to cover some hardware such as AWE and GUS cards since they need too wide range of IO that existing chipsets are unable to provide, hence PCI+parts of LPC being the only "will work with everything" solution. Like …
Re: PCI sound cards and Chipsets from various manufacturers...
Posted on 2020-03-01, 17:34
No, it wouldn't since it is about the IO access cycles rather than all the other stuff I need parts of LPC bus for. Fintek/Winbond holds the patents for these things, and earliest one will expire next year. PCI to ISA patents should all be expired by now too.
Re: Strange feedback issue from several, but not all, sound cards.
Posted on 2020-03-01, 12:30
This certainly seems to be a DC offset thing. A lot of cards when jumpered for line out bypass all the components on the signal path, including DC blocking capacitors and there's always a DC offset at (close to) half power supply voltage of a typical sound chip.
Re: Advice on making a stable VLB build
Posted on 2020-02-29, 12:48
Master slots only matter for bus mastering capable things which probably are only SCSI cards, certainly not any video or IDE based IO cards. Furthest away slots should be populated first to reduce signal reflections on the bus. I'm running an OPTi 895 based board at 50MHz with a VRAM based Mach32 + …
Re: 1024k L2 Cache- where can I find it?
Posted on 2020-02-27, 21:26
64 and 128KB chips are all 32 pin, 28pins tops at 32KB.
Re: Amd Am486 DX-40 with missing pin
Posted on 2020-02-27, 17:21
It miiiight be possible to solder the pin back to the stubs I see in the hole and then covering things in epoxy to get mechanical strength necessary. That pin is essential to operation and it won't be possible to run the CPU without it.
Re: Same Model Soundcard Revisions?
Posted on 2020-02-25, 10:40
The Yamaha things are all made by a variety of manufacturers, I have been collecting photos of the YMF71x based cards : http://www.tmeeco.eu/BitShit/YamahaCards/ Yamaha made cards have XRxxx markings on them, XR000 being SW20PC for example, XR394 is SW60PC sound card, XR712 being DB60XG …
Re: Why does the .wav on Windows 95 startup jitter on my PC?
Posted on 2020-02-23, 10:57
HDD DMA has fixed such a problem in all cases I have experienced this.
Re: Germicidial UV-C lamp for Retrobright
Posted on 2020-02-21, 06:48
I bought a cheap 6W germicidal lamp from china (which arrived in 1 week somehow lol) and it surely produces a lot of ozone. I have used it for its intended purpose only so far but I might try it in a box with a piss colored Dreamcast shell (taht changed color hidden away in a closet) to see what …
Re: What soundsolutions (speakers/soundbars etc.) are you using on your machines?
Posted on 2020-02-20, 14:02
http://www.tmeeco.eu/BitShit/PCschit/BattleStation.jpg (seems vogons won't let non-HTTPS sources to be used for images, and I will not be wasting my server CPU cycles on that) I have an EQ, small amp and pair of small speakers (compared to what's in the livingroom) for computer use. Speakers in the …
Page 28 of 92