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No, because I‘m using SwitchRes to define profiles for automatic resolution switching for certain games. I suppose then that I should do the resistor mod instead, since everthing works great at 40MHz

Hello there, while I was running the Soft475 extension, I noticed the following issues during usage: Any screen resolution change flips the clock back at 25 Mhz (the default jumper clock setting) When using 40 MHz and switching to a 640x480 resolution, the pixel clock (which is also generated...

I'm a bit stuck here, does anyone have the following document online somewhere? I have only seen excerpts of it, but I guess the full document would really help me here. :) Thanks!

Gee, thanks. Next time, I will do better, promised! ;)

What the core also has, but might be of no use for MAC users: * 64x64 Hardware sprite for mouse pointer * Full display co-processor to support Amiga-style draggable screens. In short: on any given vertical raster line, you can define "display slices" which have their own resolution and color depth.

Just to give you some pointers, here is my same graphics core running on the Amiga. It's using PCMCIA Interface of the Amiga 600/1200, but is COMPLETELY usable. Yes, even for MAC, if you run ShapeShifter. ;) But here, we are going to run this on original MAC hardware.

So, design finished, PCBs ordered. (Checkmark) NEXT! ;)

It's quite a challenge to acquire new skills, especially when you are basically working in an isolated environment without getting to meet your colleagues F2F. Has been quite a challenge for me as well, but in the meantime, I have gotten used to it. It's then "only" a matter of producing this...

Definetely, and it's also my preferred modus operandi, since I come from the semiconductor industry. So for me, FPGA is real hardware. ;) I'm considering to open source it - at least the PCB files and software. I'm doing this for fun, not for any commercial "gains" (which is impossible, given...

As with all my projects, they are FPGA based. Inside the FPGA, I'm using a full 64-bit datapath for everything, and a highly pipelined memory transaction arbiter, controller, display engine and BitBlt engine. Even without using the BitBlt engine, at least on Amiga, the design is fully usable...

Hello Mac community, since I have gotten my first actual Macintosh last month (LC475), I must admit that the "Mac Bug" has bitten me, which is why I have now also pushed the trigger on getting a Macintosh SE/30 yesterday. In order to have fun with it, I decided to port one of my other Amiga...

Nope, takes longer than ordering the PCBs and parts separately. The card itself is consciously designed so that any person with at least moderate soldering skills can build oneself. ;) Sure, I have actually the same opionion about PCBs as Steve: they also should be nice to look at. ;) (Yes, I...

So, next milestone reached, the PCBs arrived. ;) Still waiting for the parts though.

A bit, yes, but I need first to focus on the base functionalities to provide a firmware for my card. If a project like mine encourages people to attempt doing an open firmware implementation, or uboot for m68k (which i really find a great idea), then I would be glad to help here. My intention...

Success! The ROM is now starting in MESS, and my initial attempt at writing a DAFB video driver for MAC is working now. :) Now I need to get this baby running on my real LC475.

Sorry, didn't have much time yesterday. Thanks a lot, that will probably help me tremendously to implement a more organised method to probe the hardware. On the Amiga, I have to rely on the location and ID values of certain custom chips and memory addresses, but I realize that the MAC was...

So, the bootrom is now taking shape, and I can now successfully run it on real hardware, which in this case, is a tiny small Amiga 600 (and YES, it has a 68040 CPU ;) ) It will be probably a week or two until the parts for the card arrive, so in the meantime, I am actually thinking about how...

No problem, feedback is always welcome. :) What my boot rom is can be called a "BL0" loader. Modern SoCs have it often embedded in their mask rom on the silicon die, my card has it on-board to ensure that, no matter what extrinsic conditions apply, there is always a piece of code where you...

Thank you for your understanding. :) I actually know Claude personally, and he is a very nice and capable person, who does it with the same passion and motivation as us all. Speaking of.... The bootrom starts now to show a sign of life! :) I'm currently developing this on WinUAE Amiga...

Since the cpu socket needs to be elevated to re-route the power and some signal lines, it lies above the middle part of the SIMMs, so that won't also be a problem.