New release of EightyOne available

[PokeMon]

312 is correct for PAL TV norm - in fact it is 312.5 (625 lines per full picture with 2 frames).
So Sinclair used 624 lines which is accepted from all TVs I think.

[Andy Rea]

well i don't know how hard it would be but.... can one not just detect vsyncs and count t-states between them ?

Andy

[olofsen]

Should there be 65000 tstates in 20 ms (depending on /CLK), unless /BUSREQ is used? Still, it may be quite difficult to get this exactly right. Counting them (per 20 ms, or per frame) is indeed an idea, although the count will be used for the next frame. If the count is variable, the result will remain variable. Would the count be constant when using a tracker? Also an idea could be to first store the I/O to the AY with the tstate stamps, count the tstates occurred in the 20 ms for the output of the sound buffer, and map the tstate stamps to approximate times.

[Fruitcake]

Indeed. However, in file "zx81config.cpp" there is still a 312?

Yes you're right, I overlooked to change this. However In HW_.cpp, the constructor for THW calls OKClick() and in here I changed the code to use 310 lines instead of 312 if a ZX80/81:

Code: Select all

        machine.tperscanline=207;
        machine.scanlines=zx81.NTSC ? 262:310;
        machine.tperframe = machine.tperscanline * machine.scanlines;

So although the default value is incorrect, it is soon overwritten before the emulator has fully started up.

[jonesypeter]

Hi,

When I run 1.4 in Windows 10 64Bit, I get the following issues:

The loading screen appears with the keyboard, then I get a blank prompt window with just an 'OK' button.

After clicking OK I get another window which says access violation.

Peter

[Fruitcake]

I get a blank prompt window with just an 'OK' button.

Is there a title bar to the prompt? If so what is the text in it?

The loading screen appears with the keyboard

Does the progress bar shown in the splash screen fill up completely and then the splash screen disappear?


Have you upgraded from version 1.3 or direct from 1.2?

If 1.2, have you tried locating and deleting the eightyone.ini file and only then running the emulator?

[Fruitcake]

EightyOne version 1.5 is now available. The changes focus on enhancements to the debugging facilities, but there are a few minor bug fixes included also.

Download it from here.

[marste]

EightyOne version 1.5 is now available. The changes focus on enhancements to the debugging facilities, but there are a few minor bug fixes included also.

What are these debugging facilities enhancements? (I like EightyOne debugging )

[Fruitcake]

What are these debugging facilities enhancements? (I like EightyOne debugging )

Included in the download zip file is a 'Release history.txt' file that details the changes made in each version.

[Moggy]

Just a minor bug I seem to have found in v1.4 when I'm running in win7.

When using the H4th/TreeForth ROM if the "MEM ." command is invoked it reports remaining RAM as 31344 bytes whereas it should be 14976 bytes

Edit due to Andy pointing out how thick I am.