... not possible (im going from memory here) to read in port ... bits (as one controls the border colour) , as in the same ... something that asked which 128K screen to use, but that's ... the +D that asks which screen to use.

... then use a POKED-from-memory loader M/C routine which ... put the relevant data on screen (Block Type, Start address, Lenght ... ,86,5,201
20 BORDER 0:PAPER 0:INK 7 ...

... TZX and TAP.
The border is also emulated but is ... as background on the lower screen, this way it doesn't ... the bottom of the lower screen, and by holding L and ... can be loaded back into memory by simply tapping on the ...

... with memory since Big Nerd says that nothing changes on the screen ... when he powers up the Speccy. In case of dead memory ... and attributes, well, at least border. This is very likely power ... 9 and 16 of the memory, there should also be +5V ...

... and z80 format bugs, enabled memory contention emulation and added an ... the border change doesn't fit the sea line in the screen ... as it should. It's due to contended memory emulation ...

Each 3rd of the screen provides 2Kb of memory (and an additional 256 bytes if you include the attributes area).

Nice one Icabod, it never occurred to me though of the fact that the lower RAM isn't contended during the border trace!

... under paper (lower area of border), memory is not slowed down as ... memory is slow only when ULA acesses PAPER area of the screen ... (including left and right border).

... to +2A,+3, where contended memory is slow during the complete ...

... the display memory - you'll also have to do the border (and ... programs that use a 'full screen horizon' to look right) and ...

... occurs just before the top border is drawn. The exact cycle ... for 50Hz machines the top border is somewhere around 14300 cycles ... (this includes left and right border, horizontal flyback and the actual ... no updates to the screen area of the memory is done when ...

... of border will appear approximately the same place on the screen ... TOP part of the border (above the screen) by:

... your code in uncontended memory. Access to memory addresses 16384 to ... attribute buffers to draw the screen).

4) ...

... in Aquaplane, proper emulation of memory (and possibly IO) contention is ... it, the horizon drawn on border will be displayed about 20 ... drawn on screen.

You can read about memory contention [URL ...

... in Aquaplane, proper emulation of memory (and possibly IO) contention is ... it, the horizon drawn on border will be displayed about 20 ... drawn on screen.

You can read about memory contention [URL ...

... below the actual Spectrum screen (in the border areas)?

... unusal display file in the memory get converted to the ... be printed on the tv screen?

Regarding flickering, ...
[CODE]xor a ; black border[/CODE]

I have ...

... the very top of the screen? And during some short ... below the actual Spectrum screen (in the border areas)?[/QUOTE]
< ... br /> Yes, and basically yes. The screen ... unusal display file in the memory get converted to the top ...

... br /> BAQTBL(2) // two memory queues

/*****************END ...
sp1_UpdateNow(); // draw screen now

for ... RB type (right border). RB draw ...

... doesn't look like a memory error to me. I'd ... 0x02 to memory), and the ULA is showing a steady border of ... lines start appearing on the screen and the machine hangs).
screen shots, it's been bad ...

... 0x02 to memory), and the ULA is showing a steady border of ... lines start appearing on the screen and the machine hangs).
screen shots, it's been bad ...

... obtained from the messed up screen of a borked spectrum? ... it go black paper/white border, and dark red vertical ... the black paper and white border, it's more than ... stack being written to display memory.

If ... you have bad upper memory. You'll also get ...

... order to save on memory) and this change ... draw this stuff to screen. The [b]d_DrawPlotIntoBuff()[/ ... 72, 1); // OR plot border into buffer
memopi(buff ... if none)
uchar *screen; // +8 address in display ...

... Contention End, Border finish, 1st and 2nd pixels output to screen, second ... display byte fetched from memory.
14342 ... 4th pixels output to screen
14343 Memory contention end, 5th and ...

... br /> Interestingly, ulatest3 shows the memory fetches occurring from 14339 to ... get a screen of coloured squares, a magenta border with ... fetched that location from memory. Basically the FAQ is ... IO contention is different from memory contention[/I] ......" Now ...

... display the sprite on screen because of how the ... "SP1_DRAW_OR1" and "SP1_DRAW_OR1RB" (right border) -- all three draw functions we ... struct players between memory address "p" and memory address "g_players" ... colour already existing on screen before the sprite's ...

... gameplay colors. I think BORDER 3 would look better.
border). This is the only ... able to see the BORDER, so they can avoid ... to the centre of the screen, which was the original ... optimizations and ideas to "memory test". Thanks again, DP

... /> However, I don't think Memory is exciting enough that players ... would just fit on the screen.[/QUOTE]

I'm ... of numbers to flip (the BORDER color indicates the player's ...

... /> However, I don't think Memory is exciting enough that players ... different colours and position on screen would distinguish between the identifying ... of numbers to flip (the BORDER color indicates the player's ...

... improvement:-

"2 Player Memory"
[url]http://www.mediafire ... is RED

The BORDER colour indicates the current player ... then they remain on the screen in that colour. This gives ... the positional numbers down the screen by 1 row, and to ...

... circles and fills on screen reading from some memory location. How do ... pattern filler code and related screen address manipulators. The buffers ... usage. The amount of memory required is proportional to the ... black bytes on the fill border are what's in the ...

... It gave a black screen (paper and border) with two vertical ... I thought it was a memory problem, since i tried ... So i removed all memory chips and installed chip beses ... i still get the same screen.

I ... it could be a memory controller chip so there ...

... />
; Set Border Colour
;
; Stores border colour in variable ... newer version of the block memory allocator ("balloc") in the ... in each character on the screen.

SPDirtyChars ... the entire screen (or area of the screen that splib2 ...