z88dk forums

... I think the disk size is still wrong, the other results look strangely good

When the QUICKLOAD is not available, run mame with the "-debug" option, boot the CP/M disk (mout the disk image and press F5), then type in the bottom row in the debugger window: "load c:\files\dpb.com,100". alph_debugger.png You can then move in the emulator windows and save the...

MAME often allows a shortcut, after having loaded the CP/M system, to QUICKLOAD a .COM program in memory and run it directly.
So, even if you can't write in a disk image :

Tool is ready ;) https://github.com/z88dk/z88dk/blob/master/examples/cpm/dpb.c A bit of inspiration came from an ancient tool by Sydex, which is capable of listing the skew table, thus sometimes it could still be useful. I adapted it to z80asm, so it's now easy to build with zcc or z88dk-z80asm: ; T...

I noticed that both my cpmtools version and MAME are not always dealing with the disk image formats as expected, e.g. a specific model could work fine with RAW and D88 formats and fail with IMD, or vice versa.

BTW, here's my current progress, tested on the emulated Bondwell 14:

You should look around here: $2353 - [168] KEY The MS BASIC versions are usually close one each other. Here you are the commented version for the MSX. https://github.com/z88dk/techdocs/blob/fb0f764502f68487ee97c10d1511d4c9bfe8aec9/targets/msx/msxbasic.asm#L25373 The command syntax on the MSX include...

I decided to create an inspection program starting from dpb.com, it will be useful.

Yes. I'm comparing it with a working image containing only magic.com.
It looks almost identical, that's why I'm puzzled.

In the meantime I discovered a small difference in the allocation tables, now I changed from words to bytes, which you noticed as well.
Still no luck, though.

In theory you can use it as an initial feed to the SKOOLKIT disassembly suite.
I'm not sure it is easy to use on the PC6001, though. I think it has some sort of relocation mechanism in the rom, but I'm not 100% sure.

Try z88dk/support/basck/basck.c
It should be able to point out some of the ROM entries, if you use it to inspect the ROM files.

Some time ago I submitted a patch to the MAME project fixing the disk controllers on the basic Xerox820 model (SA400->SA400l drive models). The RAW format is not accepted yet, but IMD works fine. Now it is possible to work on the disk images with CPMTOOLS and, with a bit of work, run CP/M programs o...

I hope I solved the problem, look here: https://github.com/z88dk/z88dk/issues/2013 ..file size related problems are described at the bottom of the thread. I don't remember why I put in a blank space at the beginning, I vaguely remember it had to do with some target on MAME, but I may be wrong. In an...

you have several options to optimise like only real men do, assembler is only one of them =D Have a look at the opt files here and how they can be applied to clisp.c (instructions are inside it): https://github.com/z88dk/z88dk/tree/master/examples/clisp Also, do not underestimate the callee trick, s...

A generic "putsprite" could easily solve it, but I'd like to keep a faster monochrome version. I know it is less than ideal, but tiny portable games could run fast enough with tuned functions. e.g. On "microman.c" I used putsprite in "and" mode to clear the pictures bec...

Surprisingly there were many versions of ratfor, support tools, and libraries for the cp/m.
There was even a retrofit kit to support the translation from the ratfor functions to BDS C.
I've added a document file (fall 1981!) and a simple filter program.

BlueMSX includes the emulation of the sc3000. Could it be an alternative to mame?

The whole development took me very few hours in less than 2 weeks, in small spare time slots. The pictures from the startap menu are cliparts from NewsMaster, captured with the sprite editor. The title screen was converted with the wonderful BMP2SCR. Another interesting source for graphics is the ve...

I know, but being one of the authors of the portable graphics engine I wanted to squeeze and test it. The sprites I'm using are a 24 pixels wide, designed with the sprite editor. The collision detection is a mixed technique of position checks and multipoint() calls. It is obviously possible to get s...

I tried to use medium sized monochrome sprites in a game. The performances weren't good, but I could reach a reasonable speed by substituting the putsprite's "spr_and" option with clga(). clga(), aka cleararea(), can be faster but on many target it is provided by a *very slow* generic impl...

this latter case is understandable, in your asm inclusion you are outputting to port 127 (= $7F).
Probably changing the OUT instructions to port 64 it would switch to $40

Look at microman.c, -DJOYSTICK_DIALOG compile option.
A keyboard only game configuration screen is, in my opinion, part of the game personalization and gamer experience.
You are probably not willing to recycle someone else's look and feel for the final version of your games.

you probably need to copy (or move) the resulting lib file from z88dk/libsrc to z88/lib/clibs
To update it, the previous build must be removed from z88dk/libsrc

I recently tried to compile and run othello on the Sharp MZ targets but it hangs as soon as main() fires the first printf(). I tried to investigate the problem a little bit but no luck yet, and I'm replacing my laptop and I'll have to stop for a while. I tried to verify that IX is kept consistent in...

Thank you.. both !
@RobertK, it's great to see you getting confidence, we can't leave the whole work on Dominic for much longer

I just extended the Wiki page by adding a section describing a way to load and run z88dk programs in "MZ800 mode". In short, the BASIC interpreter includes a MONITOR which emulates the text mode and provides compatible console functions while running in graphics mode. I should be rather si...