Sinclair ZX80 / ZX81 / Z88 Forums

More disturbing I find the offset of the three addresses with 2048 byte which splits your memory block in small pieces.
Why don't you use other addresscoding with ONE block of maybe 8 or 16 addresses.

You obviously know what you're doing and don't need any advice but I have a few homebrew flash cartridges for various consoles that I use for programming and they tend to take USB and use one of those FTDI chips to turn it into serial directly on the board. So it's all USB in terms of cabling but t...

I know that, but this is used only/mainly for compatibility to old components. New developments for PC's should neither use parallel nor serial interface. This is quite old stuff and by the way to slow in general (not for ZX81 :P ) and no more state of the art. The only advantage is that these inter...

TommyGun is a good editor, especially for ZX Spectrum graphics - I used it on most my Spectrum games, and also to design the maps for my ZX81 games - but it doesn't include an assembler, so you'd still need to integrate it with Pasmo or TASM. Yes I tried yesterday. I think it's maybe not the best c...

Mastering Machine Code on Your ZX81 By Toni Baker http://www.users.waitrose.com/~thunor/mmcoyzx81/index.html Hmmm. What he's talking about old ROM and new ROM ? And different data structures ? This is new for me. :? Or does he mean ZX80 with old ROM ? http://www.users.waitrose.com/~thunor/mmcoyzx81...

bobs wrote:I don't believe there is any integrated ZX81 (or Spectrum) development tool.

Well, looks like we have a new project.
Maybe I also plan to integrate ZX81 BASIC to write with.
Would be a nice tool.

And integrate the loader for a real ZX81 load/save interface.

dr beep wrote:Since I am developping while on a traintrip I use a ZX Spectrum emulator (under Linux) or a ZX Spectrum emulator (under Windows) at home.
On the emulator I compile with Tornado.

I only export the binairy to EigtyOne and presto

And how do you write your code and how do you compile it ?

I'm not a Windows user so I can be of limited help only, but I can point you to http://www.microwave.gr/giannopk/zxcomputer/ZX80_O_or_P_to_WAV_converter_zx_p2wav_v0_04.zip for a Windows tool to convert from .P or .O to .WAV, which will get you to the sound card. Hi Thommy, that helped, thank you. 8-)

This was only a hint. It was not my intent to joke about you. :shock: Well timing is interesting stuff. If you have two latches with the same clock than you have something like a FIFO memory with about one byte capacity. On the second clock the second latch will get the data of the first latch if it...

I think modern LCD's can be run with 32kHz horizontal / 100Hz vertical scan rates.
That's why I hope to get a useful picture with double frequency (13 MHz instead of 6.5).