VSPEED 1.10 negative values fix \ VOGONS

VSPEED 1.10 negative values fix

Topic actions

First post, by Mov AX, 0xDEAD

Posted on 2026-08-17, 19:46

Mov AX, 0xDEAD Offline

Rank Newbie

Rank: Newbie
Posts: 52
Joined: 2024-09-08, 13:27

VSPEED 1.10 has overflow error on fast machines or under VM, it show values like "-200,00 million bytes per second".
Fixed version attached.

p.s. I don't know original webage, seems like it is part of FastVid package (https://www.mdgx.com/umb.htm#FAS)

Reply 1 of 2, by Riikcakirds

Posted on 2026-08-24, 21:01

Riikcakirds Offline

Rank Member

Rank: Member
Posts: 313
Joined: 2020-11-02, 18:18

Works well now on my faster graphics cards in Dos, I was getting -300 on a Radeon HD4750. What was the fix, increasing values from 16bit > 32bit ??

Reply 2 of 2, by Mov AX, 0xDEAD

Posted on 2026-08-30, 08:19

Mov AX, 0xDEAD Offline

Rank Newbie

Rank: Newbie
Posts: 52
Joined: 2024-09-08, 13:27

Riikcakirds wrote on 2026-08-24, 21:01:

What was the fix, increasing values from 16bit > 32bit ??

Changing integer multiplication (32 bit, overflow on fast CPU) to float point multiplication:
(int) x * (int) y * (int) z -> (double) x * (double) y * (double) z

Go to top of page Go to top of page

Back to Video