sorgelig / samcoupe_mist Goto Github PK

There's an imperfection in the NoAGA 4K demo/intro. I've verified that I don't see it in Simcoupé or in the Youtube video of the demo. I haven't tested it on my actual Sam for a number of reasons (I don't have a power supply and it hasn't been booted in 15 years, but it's on my list of projects...)

Here's the demo on Youtube:
https://www.youtube.com/watch?v=hPj8tfB4raY

And here's a disk image:
https://files.scene.org/get/parties/201 ... _noaga.zip

As for the glitch, which shows up between the 1m05s and 1m10s mark when the borders move inwards slightly for the first time.

Here's how the demo is supposed to look AFAIK via Sim Coupé:

https://miscellany.3pb.net/coupe/noaga-simcoupe.png

And here's how it looks on my MiST. Note the erroneous line of pixels down the screen a little way in from the right border:

https://miscellany.3pb.net/coupe/noaga-mist.jpg

This line of pixels vanishes the moment the borders starts moving in again.

I'm running the most recent (2018/09/11) core. I'm running RGB out to a 15khz monitor.

CPU Speed: Normal. ZX Mode Speed: Emulated (doesn't make a difference for the glitch, though). External RAM: on. (Required for the demo).

Not a major issue by any means, but seems worth reporting as this core has precise timings and is more or less perfect.

Matt Round's phenomenal T'n'T doesn't appear to work on the Sam Coupe core. Neither the full game nor the playable demo.

Reproduction steps:

1. Download Fred 54: http://www.worldofsam.org/node/707
2. Launch the T'n'T Demo.
3. Attempt to start a game -- sometimes the system will reset before you get to the title screen, sometimes it happens when you press fire to start.

While writing a demo for SAM I have noticed a difference between MIST core and SimCoupe/real hardware when the code is executed from the external RAM. I have prepared the small example code to show it:
https://www.dropbox.com/s/bh4nj29tdvtcp4z/overscan.zip?dl=0

Screen looks significantly different than it should.
When it runs in the internal RAM, there is no difference between MIST core and others.
Maybe the same problem causes an issue in NoAGA demo.

Hi,

There seems to be an issue with the latest 20170206 Core. The ROM does not seem to initialise correctly. Sometimes the Miles Gordon text does not appear. Resetting the Core it does appear, but sometimes it is not at the bottom of the screen, it can appear in the middle and the memory K seems to change. It is never 512K, I have seen 400K & 900K.

Nothing loads. If you press a controller button or keyboard button the ROM (coloured bars) screen just goes black.

I downloaded everything (ROM + Core) a number of times and have the same issues. The last 2 Cores work fine.

Thanks