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Re: HiColor DAC patch

Posted on 2009-11-20, 00:36

That demo has only two issues with my patch. One is kinda expected -- the emulation does not handle this type of geometry change properly atm so the screen width is incorrect. The other one is exactly the same issue of 32k vs 65k. The demo is definitely generating 16-bit image but the values sent to …

Re: HiColor DAC patch

Posted on 2009-11-19, 22:03

There are some issues with Doom 0.5 besides the DAC -- those illegal reads/writes are not related, at least, directly. The game does switch to 15-bit color mode but locks up immediately after that. Transgression 2 demo behaves oddly. It expects DAC at least very similar to the implemented but the …

HiColor DAC patch

Posted on 2009-11-19, 07:08

I've submitted a little patch to emulate HiColor DAC on Tseng ET4000, a.k.a. Sierra DAC. The emulated DAC is not exactly Sierra version, WHATVGA identifies it as an UMC clone but everything I could find works fine. So far, in addition to WHATVGA itself, there is an old animation tool called …

Re: Tseng 4000 in 1024x768

Posted on 2009-08-01, 21:30

There was a trick with 128K banks on ET3000 but I could not find any documentation for it beyond the reference to the high bits of bankswitch register as 128K bank toggle. SVGA documentation is surprisingly sparse. I used Ferraro's book and the text file that came with WHATVGA and neither of these …

Re: Talk about rare games....

Posted on 2009-08-01, 21:21

in Milliways
A few years ago Stanford University inherited large collection of video games. There was a piece of video in the news showing many boxes of stuff like PC versions of Pacman and Frogger... I was almost ready to stop the video and forget about it when they pulled another item out of the box and that …

Re: Lets talk size of games.

Posted on 2009-08-01, 21:09

in Milliways
IIRC, Baldur's Gate is an interesting case. The first release came on 5 CDs, then there was an expansion (Tales of the Swords Coast) that came on 2 CDs, and then there was a "complete" edition including both on 3 CDs. I think the development team reinvented compression somewhere along the way. Wing …

Re: Tseng 4000 in 1024x768

Posted on 2009-08-01, 20:57

Shed some light on the issue: I have a CAD application that suffers from the same problem at 1024x768. The problem also occurs on a real hardware ET4000. However, on a real hardware ET3000 it works. Not so using svga_et3000 in DOSBox, so there is an issue left. There were quite a few apps …

Re: Death Knights of Krynn Manual Cover

Posted on 2009-02-21, 10:45

in Milliways
Quick scan of current Ebay listings shows a few with color pictures: http://cgi.ebay.com/AD-D-Death-Knights-of-Krynn-IBM-PC-SSI-CIB-1991_W0QQitemZ370148165344QQcmdZViewItemQQptZLH_DefaultDomain_0 and http://cgi.ebay.com/Advanced-D-D-Death-Knights-of-Krynn-5-25-Disc-Version_ …

Re: Questbuster

Posted on 2009-02-01, 22:06

in Milliways
Half.com has eight of those listed atm and their prices are considerably better. Search for "questbusters" and "quest for clues". Most of those books are not particularly rare.

Re: Questbuster

Posted on 2009-01-26, 02:41

in Milliways
Not exactly a magazine, I think it was more like a newsletter. Many solutions were republished in books, eleven of them. There were five books with Questbusters name, and six in a similar series called Quest for Clues.

Re: "The Horde" CD, anyone has it?

Posted on 2008-03-09, 09:22

in PC Emulation
Coincidentally, got yet another disk with the same behavior, this time King's Quest V -- picked it at library sale. The last four sectors of the only data track are not readable, it is past all files. Quick search through the image... "MERIDIAN_DATA_CD_PUBLISHER" at offset 81D6. Well, three times is …

Re: copy protection

Posted on 2008-03-09, 09:18

in Milliways
And how would it be defective? 'cause a bad sector is a defect, technically :wink: It's amusing to see how two kinds of distributions existed in late 80s/early 90s -- in one case you would get a warning that disks are copy-protected, in the other the first page of the manual would instruct you to …

Re: copy protection

Posted on 2008-03-08, 20:19

in Milliways
How would it be against the law? That may be a joke but I think a good lawyer could actually make a case about "intentionally selling a defective product." That's what lawyers are good for 😉

Re: copy protection

Posted on 2008-03-07, 09:34

in Milliways
IIRC, there was some type of copy protection on C64 that actually killed quite a few drives. Truth to be told, 1541 was a particularly lousy design. Atari 800 drives moved reading head to track 0 before every attempt. I think at least some 5.25" PC drives did the same thing causing bad grinding. …

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