I've been looking at a few CRTs from the 90s. The NEC Multisync 3D, compared with its predecessor, had a higher resolution due to a faster refresh rate and tighter dot pitch. https://crtdatabase.com/crts/nec/nec-jc-1404hma The "IBM 8514 monitor" aka IBM PS/2 monitor(s) have a comparable but not the …

Ah, yes, it was 4:3. It's a 2005 ViewSonic LCD. I wonder why the Diamond Stealth VRAM video card permitted options for the monitor on power up? Was there some reason to set the switch for monitor IBM 8514 on power up? Do you think most monitors back in the 90s used the same analog signal as the IBM …

I've noticed a dip switch on the Diamond Stealth VRAM where on the PCB one side of the switch has traces leading to the S3 911. The other side looks like a grounding pad. I have them all closed, thus shunting all the traces leading from the dip switch to the GPU. I have a list of the dip switch …

Thanks. I can see everyone who replied is very interested in graphics history. I recently decided to build a 486 because of how much support I knew I could get from the large community that has been the IBM PC clone industry. I now realize that there was a driver for the s3 chipset and Windows 3.1. …

When does the acceleration take place? In the Windows 3.x shell? What causes a 2D Accelerator chipset to respond to the Windows GUI? As far as I know these chipsets of the early 90s did not give games in DOS a boost in VGA mode performance. But Windows 3.x had no graphics chipset driver. Maybe a 2D …

I am referring to a page from my motherboard manual: To support LBA or LARGE mode, there are softwares located in the AWARD HD Service Routine“INT13H”. It may fail to access a HDD with LBA or LARGE modes selected if you are running under an Operating System that replaces the whole INT13H service …

It is likely that your disk may have no LBA support, so CHS only. So it will make problems on USB adapters. No wonder to me. Any idea why my model hard drive, the 425 MB Conner, shows RLL as the recording method on "Stason". Tried a search for specs by Stason for numerous other hard drives in that …

I just found this looking for info about enclosures here on vogons. https://www.vogons.org/viewtopic.php?f=61&t=75925 Similar situation. He had a 486 and needed to revive the OS. He wanted to try a USB / IDE enclosure. But someone explained that you can't use a CHS drive with a USB adapter. I am …

The Win95 boot floppy was made with an *.ima downloaded from REMOVED PC. It is OSRV2 and some files in the archive post date 1995. The hard drive is a Conor CFS425A. It is 425 MB and PATA-1. The computer I formatted this drive on is/was an Aptiva E-Series 580. It is a Win98 machine where I used the …

I think my newer windows 11 machine is unable to recognize the partition on an IDE hard disk I formatted with Windows 95, on a machine that's over 20 years old. It had EIDE and the disk was IDE. I used "format c: /s". Then after I got it formatted and bootable my older machine had succumbed to some …

I have not returned to this topic for awhile but in this time I've learned much from the replies here and on my own I've read about important working details of the ibm-pc hardware. To start off with, this thread is about a socket 5 mother board I got that didn't come with on board support for a …

Hello. I'm currently working with a socket 5 motherboard and pentium 100 MHz CPU. It is a soyo sy-033a and I have no clue how they planned on the user installing an OS. There isn't a ide disk or floppy connector on the motherboard. I have two "legacy" ISA slot IDE interfaces, but accessing a CD-ROM, …

I am waiting on a low insertion force PGA socket to arrive by mail. I believe the LIF will make probing tiny ZIF socket holes easier. When it does I plan to resume testing. But for now the ZIF socket has a burn mark at hole for CLK. I was using staples and a set of helping hands I got off Amaz*n . …

I attached a couple photos I made illustrating my understanding about tracing signal activity using an o'scope on processor CLK. Do you place a probe on the solder joint for the pin for CLK? Pin RESET is also shown. Similarly the EPROM picture shows E not and G not/VPP. These are Chip Enable and …

Hello, I have a motherboard that appears to be energized and stalling before POST - a blank screen, no beeps, and ISA based POST board shows flat line display/lit status LEDs. Using a programmer, the original BIOS EPROM appeared uncorrupted. Later, the original BIOS EPROM, using version info on it's …