Sinclair ZX80 / ZX81 / Z88 Forums

Yeah: EightyOne_compiled.JPG The issue above was a "self-made" one. A few weeks ago, I had installed the recent community version of the C++ Builder. And that had overwritten some of the settings of the version 5 used for the EightyOne. Plus, it has this TPrinter class which conflicts with the one u...

Thanks for keeping this emulator alive. The instructions are superb, step-by step and easy to follow. Just instead of burning a DVD I just mounted the .iso file with a right click (windows 10). I had version 1.23 up and running. Now trying to update to 1.29 I ran into the issue with the AnimTimer me...

Hello, having the idea such a function could be useful in own programs I reviewed the code (Kevin Hill 1983) in more detail to learn how this could be done. In principle the program seems to work. I am saying "in principle" as for one I am working with an emulator not knowing how representative this...

Hi, I am using FASM-ZX which is very tightly integrated with the EightyOne emulator. It allows you to mix assembler with Basic and start your emulator with a single button. :!: You simply use labels instead of address numbers (in assembler and Basic as well) so you can freely add and insert code as ...

thanks, I know understand how and why you "place place routines on the screen or even on the stack".

Thanks for confirming and also pointing out Bit 6. Just that I think I need to dive deeper in the display routines (and their relation to the hardware) to fully comprehend. But I will use this going forward as is definitely works as you described. :) In the game code example we started after cdflags...

Hello, while looking into the thread https://www.sinclairzxworld.com/viewtopic.php?p=41302#p41302 I was wondering how the initial start part works. After some hours of puzzling I can see now some basic code within certain sysvars. Some other sysvars get automatically set by the load procedure and a ...

Thanks for pointing to #292 and #297. My first approach looking at the documentation (Ian Logan) Logan_292.PNG made me first doubt because I read the '(MARGIN)' and '(CDFLAGS)' as simple references to the system vars as described in the original Sinclair handbook. But thanks to today's emulators I c...

Hello, I am late starter hoping this discussion did not die yet. First of all I have created a personal version: GAME1-012.asm Since I use using FASM-ZX, you may need to adept to your assembler of choice. game1-011_test2.png The weird character in the listing below is actually showing as a ZX81 grap...

Hello, becoming 60 early next year I have the luxury of being already in early retirement. My main hobby is currently my grand daughter who became 3 a few days ago. :) But since there is still plenty of time available I wanted to get back to my first computer love which was a ZX81. I got one borrowe...