forum.defence-force.org

Ah,

Just saw the answers from Kenetth and DBUg... Very good points !!!

Nice test setup ! What is the chip you use on the bottom left above the ribbon cable (supposedly for address decoding) ? On the subject of your "BIOS" and dflat implementation hardly fitting in 16 kB... I suppose you could consider using *two* 16 kB EPROMs with additional address decoding with maybe...

Hi 6502Nerd, On second thougths, while it is of course nice to design a custom ROM for dflat, it would also be nice to allow the editor+tokenizer+runtime lib (ROM at present) to be loaded into RAM (like Forth implementations for the Oric) even though it would drastically reduce available space to pr...

Last interesting (?) thing: if I change the crystal oscillator for a 20 Mhz one, the ATMOS does not boot with the original 6502 CPU, supposed to support 2 Mhz (though its speed is only 1.66 Mhz with a 20 Mhz oscillator). However, with a WDC W65C02S8P-14, it boots and works flawlessly. Next time, I ...

Hi there, and welcome ! Thanks for telling us about your personal story with the Oric 1 and your experiments about building 6502 SBC, that's some endeavour! I'm really interested about your new dflat script-like language, love the name (although you're not the first one to do the pun - I tried to lo...

Hi, Another approach would be dictionary-based; instead of trying to find an approach to optimize (or compress) encoding of individual letters, you would use or or more bytes as indices into a lookup table of words. One approach I thought about would be inspired by the encoding of code points in Uni...

-> The HxC Floppy Emulator firmware can be installed quite easily on the "Cumana Reborn" drives : You just need an usb stick ! (Hundred of flashfloppy Gotek and clones was flashed with the HxC firmware this way until now.) Please note that the "Cumana Reborn" is just a cloned Gotek designed from my...

Hi @DBug, @Symoon and @iss Many thanks to the three of you for your replies, indeed it looks like there are two differnet HxC devices, and Symoon may be right about only the USB model supporting DSK. Now, I suppose I can just find out the HxC designer's address and send him an email to get answers t...

Is there a Cumana Reborn manual/read me/FAQ somewhere to see what more I do not know that is possible on it? Never looked for it actually as it from the box did what I needed it to do.... Not to my knowledge but again, as it is based on FlashFloppy you should go to the FlashFloppy Wiki documentatio...

Ah, thanks for these explanations ! Actually, digging a little deeper, I found out that by replacing "svn" by "tree/head" in the URL it worked: E.g: http://svn.defence-force.org/tree/head/users/chema/Blakes7/Sources/ works and redirects to the correct target URL. However, I will follow your directio...

Here is the info about the dsk formats: https://wiki.defence-force.org/doku.php?id=oric:hardware:dsk_disk_format Thank you very much for the link Chema, it is much clearer now !! However I doubt adding Oric DSK support is as straightforward as you think, otherwise Keir would have long done it I thi...

EDIT: good news about the possibility to update the FlashFloppy driver in the Cumana Reborn device: Piotr just gave me te procedure which is quite simple: copy update file to pendrive insert pendrive into powered off Cumana Reborn maintain encoder button pushed and power the device on then release ...

Thanks Chema for the info, so really, if we were to convert to HFE, we would have to: first decode the HFE file to translate it as a stream of raw data bytes then just use the 'old2mfm' utility to convert it to the new DSK format ? But what I fail to understand is you are speaking of file encoding, ...

Well xahmol, I was a bit biassed myself in pretending French is so simple, of course there are many exceptions, but for starters you don't have to bother with accentuation as in English, and second there are (I think) much fewer 'exceptions' to the basic rule that all basic blocks are always pronoun...

To be honest I know as little as you about the DSK format. But I was under the impression (from the discussion in the GitHub issue) there was an "old" format, and a "new" format. So I'm not sure if this is related to having a specific format for Jasmin and another one for Microdisc. I'm sure @DBug o...