forum.defence-force.org

If I am not mistaken, Pravetz already has a disk controller, however that's Apple ][ compatible controller. So, is it possible to use hxc floppy emulator with Pravetz without having extra disk controller? The Pravetz 8D is an exact copy of the Atmos, it does not have a built-in controller. The only...

I'm not familiar with the programming of these things, but some questions: Are we sure that the size of the files are multiple of 64 bytes? If I understand correctly, erase_program_verify_page, is the routine that writes data from a 64 bytes buffer to some particular address in 'rom' and then return...

Personnally, i've learned 6502 code with "Leventhal's 6502 programming" I've got later zak's books. There're both good. I have both :) The Leventhal's is a good source for already made programs/snippets of code, but I don't used it much as a reference. So basically in summary: - Leventhal...

It's my main 6502 reference.

Zaks books are very standardized, he wrote the same book for Z80 and bunch of other processors, so they all have the same structure with some information about boolean and logic, addressing modes, then instructions and some tables.

Fortunately the books are good

@barnsey123: That's actually not a bad idea.
Not sure how doable it is, but definitely not stupid.

So my current status is that I'm trying to track down a local PICKit2 that I can use to debug the firmware/bootloader issues - and as soon as I have this, and have been able to build a firmware/bootloader image, I can get stuck into debugging it. However this will take me a couple more days yet - t...

I'm not far of having a clean version of the FloppyBuilder we used in the Defence Force demos. Most of the code has been rewritten, the description file syntax is now totally different as wells as both the loader and exported floppy layout information. The biggest achievement so far is that in emula...

You can help debugging by using the printer output, that's practical do dump information to a text file for later review

While Cumulus is an excellent and compact solution, the physical Drive + HxC has the advantage of allowing things like ripping out old real floppies in a reliable way - something that readdsk on a pc is not always able to do anymore.

Looks cute

any idea of time line for production. And method of payment preferred. The production of the hardware has already started some time ago, the delivery will start after the units have been 'flashed' with a reliable boostrap firmware. Boris said he was fine with either bank transfer or Paypal for paym...

Hello everybody, the price for Cumulus is now known: 70 euros, including the red and black case. So the status from now one: - Boris is still busy soldering the units - the actual payment/expedition will start when he receives the fully debugged version of the bootloader. This bootloader is what goe...

I understand. The standard charset still gets copied when we enter hires but if I don't use the std chars I can use that memory for something else. Got it (just have to ensure i print attribute 9). You have two ways of doing it: - Write to the TEXT location of charsets, and switch to hires after (t...

By the way, if you are interested there's an easy way to get almost 1 kilobyte of free memory: Instead of using standard text, use alternate text, and overwrite the standard text with whatever you want :) Deffo interested but how would that work? I still have to load the new font data of size X. Pr...

Also, if you change SET OSDKADDR=$500 to say $400 in your osdk_config.bat, you get 256 more bytes available.