Diagnostics for Windows - SP3623 (09-July-1997) and SP16160 (v3.02A 18-January-2001)

Diagnostics for DOS - SP16085 (v10.40A 07-December-2000)

Only known images of the 256KB cache module (courtesy of user stuvize, posted to Vogons circa 2015)

Part no. 002748 / 142821-001

(Question: does 003560 / 194380-001, listed in the quick reference guide, work with the XE560?)

I found this picture of 003560 that suggests it's NOT the right module for this computer:

And here’s my guy:

Currently tricked out with 136MB RAM, an AWE64 Gold, an Adaptec 1542CF connected to an Atlas 10k.4 which seemed to be the best balance of performance and temperature. I tried several ISA video cards (ET4000’s mainly) but none could compete with QVision on a local bus. The ODD is connected to the onboard IDE.

The processor looks upgradeable. Here is the cache module slot. Will I ever find one? 😜

I will take some shots of mine in next day or 2 but remembered finding this old article on the XE560 and some the other Pentium machines of the time

https://books.google.com/books?id=BjsEAAAAMBA … 20world&f=false

Some performance metrics regarding the video system, using Phil's benchmark tools, comparing the onboard video (Qvision 1280/i) against a Tseng ET4000 ISA. This is my fastest ISA video card until I can find a Cirrus Logic CD-GL5434 card. Based on this difference, I think the integrated video is by far the best possible option for anyone who owns this PC. Yay - one slot saved 😉

Open to advice on how to do inline textual tables on this forum, if anyone has ideas.

An update! I saw on eBay what was advertised as a 1MB upgrade for the QVision 1024/I, part number 139169-001. From what I was able to dig up, this seems to be an upgrade part for later Presario systems. However, looking at the posted pics, the connector looked a lot like the on-board connector for the XE560's QVision 1280 on-board so I decided to buy it. As it turns out, it works perfectly on the XE560 and the system now has the full 2MB frame buffer. No observable change to performance, but 1024x768x16bit color works fine in Windows 98, albeit VERY SLOW.

very nice to see you found one, sorry for the very late reply past few years have been alot of up and downs for me trying to get my life on track. I was able to find a Qvision card with the upgrade module on it last year for a great price something you can not say about many retro parts anymore

I found this thread because I got myself a machine like this, and mine does have both the super rare cahce module and the video ram upgrade. The cache module does look like the one posted earlier in this thread. The Compaq spare number is 142821-001 and it is (c) 92,93 Compaq.

//A

I am going to take out the module and do high res pictures of the front and back and upload them somewhere. Do we have a place to put images here?

iamanna wrote on 2022-02-19, 22:41:

I am going to take out the module and do high res pictures of the front and back and upload them

We put them here, together
https://www.ultimateretro.net/en/motherboards/1344

Swiego wrote on 2020-07-31, 17:05:

An update! I saw on eBay what was advertised as a 1MB upgrade for the QVision 1024/I, part number 139169-001. From what I was able to dig up, this seems to be an upgrade part for later Presario systems. However, looking at the posted pics, the connector looked a lot like the on-board connector for the XE560's QVision 1280 on-board so I decided to buy it. As it turns out, it works perfectly on the XE560 and the system now has the full 2MB frame buffer. No observable change to performance, but 1024x768x16bit color works fine in Windows 98, albeit VERY SLOW.

s-l1600-2.jpg
s-l1600.jpg

I have used Compaq Deskpro 4/66i with 1 MB QVision (I have the option unit of 512KB) it can give 5201 chr/ms at Landmark Video. I later have Compaq ProSignia 4/66 Model 1000 with QVision 1280/E card, (works on EISA bus) and it was performing 8260 chr/ms at landmark. I have a pal, at our University's Computer Programming Department at that time, he has a Siamese cat, and an IBM VL-bus based 4/66 computer with 1 MB Cirrus Logic. His machine was performing more than 10000 chr/ms. I become upset, why QVision fall behind of it so. QVision 2000 series were PCI, they might be much more faster! But, QVision 1024 and 1280 series were sadly not....

Note: I have replaced 16 MHz oscillator with a 17.35 MHz one, so 66 MHz DX2-66 runs at 72.347 MHz on the picture. A 17.5 MHz one is on sale from eBay Poland now as of 6-Jan-2023. https://www.ebay.com/itm/264953834574 (Check the size for compatibility, black box shaped oscillator is 14 mm x 9 mm) This one may also fit, I did this replacement about 20 years ago. But, do not try a 18 MHz or faster one, I tried a 17.85 MHz but did not boot!

I got this machine as well, without cache and vram.
No one mentioned it, but it has OPL3 on the MB!