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Re: Retro Development

Posted on 2021-02-10, 01:47

in Milliways
Well, I guess you just started a thread. :laughing: These are some existing threads : https://www.vogons.org/viewtopic.php?f=61&t=78694 https://www.vogons.org/viewtopic.php?f=61&t=78833 https://www.vogons.org/viewtopic.php?f=5&t=68652 https://www.vogons.org/viewtopic.php?f=5&t=70485 https://www. …

Re: Collecting: Dutch PC warez-scene demo's

Posted on 2021-02-09, 04:19

in Milliways
Cracktro's, and specifically Dutch.... Hmmm, other than the ones you already mentioned, none come to mind. How many Dutch groups were there anyway (on PC)? However, non-Dutch, I do remember The Dream Team (Sweden? Not sure): https://www.pouet.net/groups.php?which=5988 Specially this one was used on …

Re: VESA mode programming from real mode

Posted on 2021-02-03, 21:04

Ouch, the clearing of the artwork window is expensive . Those routines do a few different things, setting and clearing some variables, but the main one being a call to my gfx_BoxFill() primitive, which paints a rectangle in a given colour. Maybe I missed this in the thread, but how do you deal with …

Re: VESA mode programming from real mode

Posted on 2021-02-02, 21:12

megatron-uk wrote on 2021-02-02, 16:48: I would dearly love to know where my long-lost CL-GD5428 got to in the last 6 years, as that would be another ISA card to test with. I've got the VLB version of that card but unfortunately not in a position to test as everything is stored away atm 🙁

Re: VESA mode programming from real mode

Posted on 2021-02-02, 09:43

megatron-uk wrote on 2021-02-02, 09:29: Ah, is the VGA DAC fixed as 6bit in Dosbox? I would imagine that it depends on the VESA BIOS used, which I assume would match the hardware it is trying to emulate. Yes, it would probably be good to test with real hardware and knowing what the specs of it are. …

Re: VESA mode programming from real mode

Posted on 2021-02-02, 00:49

The "capabilities" field of the VBE info seem to indicate the supported width of the DAC. The Capabilities field describes what general features are supported in the video environment. The bits are defined as follows: D0 = DAC is switchable 0 = DAC is fixed width, with 6-bits per primary color 1 = …

Re: VESA mode programming from real mode

Posted on 2021-01-31, 22:02

It seems to be working, in that it is copying the the entire contents of the buffer into the video window (in 64k chunks). I've clearly got something wrong somewhere, but I'm not unconvinced that I still have some integer conversion issues as per my other thread, which are causing the duplicated/ …

Re: VESA mode programming from real mode

Posted on 2021-01-31, 21:36

Okay, sure. I didn't see that last sentence on your previous post. If you're going for the __huge approach than you probably need to figure out how you can memcpy in 64kb chunks to video memory since the addressing of the __huge buffer has some special addressing techniques, unless Watcom has a …

Re: VESA mode programming from real mode

Posted on 2021-01-31, 20:49

Memory model doesn't refer to the "size" of memory. If refers to how the memory can/is accessed. So, in 16bit real mode you can only allocate up to 64Kb of memory (limit size of a segment because the "offset" part of the address is 16bit). In a small memory model (usually a com file) all code and …

Re: If we were to accept 15 years ago as retro....

Posted on 2021-01-29, 20:37

in Milliways
If I'm not mistaken, "retro" means something along the lines of "imitation". I.e. something that was popular in the past made a comeback. I guess fashion is the most obvious example. So, retro doesn't mean "old", it means it's new but mimicking something from the past. This would mean that in …

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