z88dk forums

The PROFI clone, "unrealspeccy" emulates it properly. profi.png It looks like 2 different CP/M versions were created, but the UDF disk image after booting seems totally dumb, I suspect the BDOS component is missing because it doesn't even understand a DIR command. Luckily also a good CP/M ...

A last note regarding the Elwro boot problems.
MAME has this exact same behaviour on the Scorpion emulation.
Considering that the same boot images work fine on RealSpectrum there's a good possibility that the problem is on the FDC emulation in MAME.

Those CP/M disks are even more different one each other than expected ! One of the biggest obstacle to support some rare format is the sector numbering. Here https://forums.debian.net/viewtopic.php?t=112244 --are mentioned 5 different methods supported by 22disk. Another less tricky but totally unco...

SP1 works on a fixed sprite size. The picture data is provided by the programmer, thus the flip/rotate routines I mentioned could be applied to such data to save space. I'm not very good with SP1 but a data manipulation routine should be easy to implement. EDIT: your idea is very interesting. Dealin...

It is in my wish/todo list to do something similar on the monochrome sprites. The ideal approach depends on your needs, it could be necessary to swap also the colour attributes, have an knowh number (or proportion) of bytes to flip, etc.. Supercode provides the routines to reflect the characters on ...

Couldn't go further on the Elwro 800 Junior. The MAME status is very close to a working condition, attempting to change the file format and the floppy type definition on MAME and insisting with "Retry" i could get a portion of the directory shown. Still the only way to currently test some ...

The ELWRO-800 Junior clones from poland. https://oldcrap.org/2017/11/10/elwro-800/ Very little is available online, but I think I understood there were two different disks formats around, version 4 was HD perhaps ? The MAME emulation is close to a working status, I got the only system files availabl...

I found a CP/M boot disk for the "Sonet Baltic++" soviet clone, or at least it is listed as if it was a CP/M system disk for the "BALTIK" (Балтик). https://zxbyte.ru/baltic_en.htm (scroll at the bottom for files) baltik_cpm_disk.zip includes baltik.kdi, which can be converted wit...

I know. The same disk format should work IIRC.
Sadly the current library doesn't fully fit.

+ Quorum ZX clone(s) ! https://sudonull.com/post/157918-CP-M-80-on-the-clone-of-the-Quorum-Spectrum In my information, the only way to use the resulting image files is to convert them into .FDI with SAMDISK. The intermediate format can be .DSK, .D88 or ,IMD. I chose ".DSK" because we had i...

I'm pulling the MicroART ATM Turbo model. It's good enough to produce, other than a raw TRD file, an IMD version which. when converted with SAMDISK into FDI, will work on UNREALSPECCY. MAME is not reading the disks but I'm not sure the problem is on the file format. EDIT: on the ATM Turbo no boot di...

This one should work for the ATM Turbo CP/M disks # ZX ATM Turbo diskdef atmturbo seclen 256 cylinders 80 sectrk 16 heads 2 blocksize 2048 maxdir 128 boottrk 2 os 2.2 end And this for the Quorum 128 # ZX Quorum 128 diskdef quorum seclen 1024 cylinders 80 sectrk 5 heads 2 blocksize 2048 maxdir 128 bo...

I'm currently looking at possible new CP/M disk formats and I ran into some of those disk images I was looking since forever. The number of attempts to add CP/M support to the ZX Spectrum is bigger than expected, but most of those systems are not emulated or the emulation level is too poor. Luckily ...

Black belt confirmed, Dom. You're getting so fast in fixing.. everything?

I agree, I was betting on the VDP transfers concurrently with you. . Having a real hardware to test on is always of great help, though. Do you think we can do some trial and error with Robert?

Yet another weird format, the 'Amust'. Having the boot tracks formatted differently was more common on the 8" floppy drives, but when it happened on different media formats everybody had its personal way to go. There's a good probability that keeping 5 big sectors on the first track (both the s...

We now have also a 40 tracks floppy mode for the microbee. It required different space for the boot records and a different starting position in the sector skew sequence which is odd (the skew factor is always 3). Moreover both the 40 and 80 tracks images need to keep the sectors shuffled over a seq...

> to avoid redoing everything in 2033 when I come back to re-finish them =D Don't bet on it ! :D Well, as Felipu said you can get most of the newlib benefits also in the classic library now. My personal taste goes to the classic library because I'm a mainac of portability. People wishing to squeeze ...

With the new "side2_sector_numbering" option I got a valid configuration for the GNAT disk format. At the moment it is a totally lost/forgotten system, but it passes the check with ALIENC.COM on an emulated microbee

I'm pulling in a new option, side2_sector_numbering, useful to deal with those disk formats requiring a progressive sector numbering between the two disk sides. The Kaypro 4/10 double side disk format is a perfect test case (https://forum.vcfed.org/index.php?threads/kaypro-10-reinstall-disks.55186/p...

Awesome ! Thankyou for supporting this !
I also wish to thank @HeronErin and all the people trying hard to raise our interest on the evolved TI83+ models.

you really should first clean the analogue section. mono tape recorder, heads (alignment..), etc. also the rubber belt could be fixed. I mentioned maketzx because it does the conversion on the fly, you immediately understand if it is loading or not. Then, probably the code you are willing to keep is...

The Don Maslin archive includes the files for the GNAT System 10 computers. I used them, partially unsuccessfully to test this new method of merging the results gathered from the IMDU convert log and the ones listed in my file (data obtained from ALIENC.COM). It's not enough to build a valid disk im...

what I did in the past was to dump the whole tapes via wmaketzx.
The tzx itself helps remembering what was in, if something important is broken you can focus on it later using the tzx file as an index.

While trying (once again unsuccessfully) to port a northstar emulator on Windows, I bumped into a couple of tools for the Microbee. They are were named "alien" because they were able to exchange files working on several disk formats, one of the two even addressed the MSDOS/Apricot, NorthSt...