The Sinclair QL Forum

It shouldn't actually be too hard to port it to any other fpga board. Only a few things would have to be changed. Mainly the rom/tape upload which is currently done using the arm io controller would have to me replaced. Since most other FPGA boards contain flash memory it'd probably easiest to use t...

I notice you have USB ports on the MIST board, do you have a QL USB driver. I don't need to. There's an arm controller doing all the USB magic and also booting the FPGA and doing SD card, controlling the on-screen-display etc. To the FPGA keyboard and mice look like ps/2 devices and gamepads look l...

The CPU Core is a tg68k. I am running it as a 68000 equalling circa 14mhz. But I'll reduce that so it gets closer to the 7.5mhz. In my Atari St and in. The Amiga setup the same core runs in 68020 mode at roughly the speed of a 32mhz 68030. This is probably close to the limit of this particular core....

Binaries for the MIST owners will appear here:
https://github.com/mist-devel/mist-bina ... r/cores/ql

First results: https://youtu.be/tdZv0u2SDv0 This is the TG68k CPU core which is also used for the Minimig Amiga core and the MISTs Atari ST core. It's using microdrive images in QLAY format which are uploaded into some unused part of the 32MB SDRAM. It's currently using a HDL implementation of a ver...

Martin_Head wrote: 1. The QLAY .mdv image files (174,930 bytes).

This is the format have had a closer look at. And indeed, contains all the information. This is what i used in my tests as seen here:

https://youtu.be/tdZv0u2SDv0

Is the emulator this thread started with available in source code? This would help me compare the things my board does with some debug output I can hack into such an emulator.

I found this archve with four QL MDVs for the QLAY emulator.
http://web.inter.nl.net/hcc/A.Jaw.Venema/psion.zip

They are in the format Martin describes which seems to be the spectrum format ...

What Martin describes is exactly the format i see in the GamesCart.mdv i got from this thread http://www.qlforum.co.uk/viewtopic.php?f=19&t=749&start=10#p6870 This is no surprise as Martin is the one who made that file. And it's the file i am using for testing. From Tobias' explanations this...

40us would be 200kbit/s and 25kBytes/sec. If a tape loops in 7.5 sec then this equals 187500 raw bytes per type. A tape in reality holds ~220 sectors. So a full raw sector incl. headers and gaps would be ~850 bytes. A header is 14 bytes, a full sector is 610 bytes according to one of your previous p...