... a real Spectrum machine to test it properly.

test it, by running the ... the demo you choose to test:

[LIST]
128 BASIC" mode. Thus I ... slightly different timings on start up (the border effect ...

... series of 'draw' commands, with start position and length of a ... this data and draw the screen from it. But you could ... code on its own to test the data will do what ...

I test TAP loading from filebrowser(NMI) ... very short time and game start. If browser after press ENTER ... seconds pause after load each screen block and we can see ...

... ]
Green points mean the start of a new attribute grid ... a direct conversion to ZX-Screen via Javascript with generating a ... concept. My values for the test images had been xStart: 8 ... - but I repeat, the [B]test image is inaccurate and will ...

... to 16,16 area of screen, 256 bytes I think ... m sure but a quick test shows it works.
... store_attributes
ld hl,22528 ;start of attributes
ld de ... distanc to the next row start
add hl,bc ... from the buffer to the screen
ldi
ldi ...

... 't boot at all (scrambled screen, no FATware) and the CF ... can be unstable or not start after power-on (card active ... signal reset)

For test you can on system connector ...

... ? Because that was where my test-code was and it worked ... example if I want another start address). However, the "zmakebas" that ... default loader has loaded the screen and all the code banks ...

... /> [*]Fairlight 128K: Crashes after initial screen. [URL="http://alessandrogrussu.altervista.org ... graphics in presentation screen, locks up at game start. [URL="http://alessandrogrussu ... alessandrogrussu.altervista.org/bak/YAKF-128+2A.tzx"]Fixed version here ...

... yes, it's a memory test. From Geoff Wearmouth's ... RAM and this code will test
; it all till ... supplied top value. The entire screen turns black with
; ... ,DE ; carry when back at start.
INC HL ; and ...

... some limitations.

-- Start the guest system [B]in ... , you only needed to start in fail safe mode prior ... 't need you to start up in fail safe ... 636475]dxdiag will fail some test, because [B]only DirectX9 ... I can't run full screen, but the SDL version ...

... bitmap. I can also start my x axis (columns) ... suppose it depends on the screen resolution.

... entire affected rectangle to screen. I also like the ...

I will test a hybrid solution. Assume you ... is you get to test many solutions for the ...

... of bitmap. I can also start my x axis (columns) loop ... suppose it depends on the screen resolution.
[/quote]

test both approaches. ;)

[quote ... />
[quote]
I will test a hybrid solution. Assume you ...

... =Encarnado;640447]If the 128 BASIC 1985 version was ... ROM 0
* full screen string editor
* four ... 128 BASIC
* switch editing modes (48 style/full screen) ... use anything other than start at 10 with offset ... of the original Spanish 128 ROM is the best ...

... file.
And on a 128, there are 228T per line ... ROM itself that causes the start time to wander. If the ... up to 20T to the start of the interrupt routine. If ... won't come near the screen. You could try doing OUT ...

The boot state of a zx81 isn't a good test for the video.
Draw a line with lots of inverse spaces, as the problems come when black and white are mixed. Even better load a game like x-tricator with a mostly-black start screen. That'll test it. :)

... ://www.mojontwins.com/warehouse/test-checkered-128.tap[/url]
... />
;; First we fill screen 0 with the pattern and ...
;; First we fill screen 1 with the pattern and ... = 912

;; Show screen 1 for exactly 228x4 = 912 ...

... 48K BASIC.[/QUOTE]

Test this version:
[url]http ... ZX hangs after power-on, test if ZXROMSC is in log ... ,0 in 48basic, then ZX start with 128 menu ? Yet NMI button ...

[QUOTE=velesoft;644821]Test messenger with removed eprom and ... , it's impossible to boot. Screen full of moving colour patterns ... to boot from internal ROM (screen is first full of random ... , then the moving colour patterns start. RESET doesn't make the ...

... GAL[/B]

I test it on my first +2 ... pulse). Messenger after reset always start to 128 menu. NMI jump always ... to 48basic.

I test messenger also with my next ... #0321[/I]

I test all ZX128 and +2 rom ...

... machine enters to this screen which looks like corrupted ...
When in that screen, I can still press the ... back to that white screen where I can type ... work. The more I test, the more non working ... Starquake does not even not start, nothing happens when I ...

... up, give you a Blue Screen of Death (and if so ... still problems, then go to START > ALL PROGRAMS > ACCESSORIES ... there are still problems, then test the memory. To do this ...

... =jagman5994;646305]I let the test utility run for 3 hours ... did not change to the 128 se rom from fuse because ... /> Bill.[/QUOTE]

Then test you ZX ram: (If you ... test it on DIVIDE, not remove divide jumper, ignore message on screen ...

... was just a way to test it at first.

... de ; the difference between the start of
; the channels area ... a question mark
cp 128 ; instead.
jr c, ... /> ld (chrad), hl ; on the screen and calculate the address
screen
call pixel_add + 2 ;< ...

... corrupted lines running down the screen.

Second reason is ... also find that navigating the start area is a lot quicker ... have installed some apps to test them, I probably wont make ...