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What's going on during a reset?Always wanted to know this. Why does the screen fill with garbage then white lines on black then just a totally black screen? What is happening?
... known "good" address is stored in HL, and that becomes ... when it hits the attributes area (22528 to 23295) the ... moves into the display area (16384 to 22527), ... value "2" is 00000010 in binary, and that gets repeated ... There's more done in the interim, of course, ... -
ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…
... removed and a standalone app in its place. When I hit ... specified by the NMIADD system variable, not pull up a file ... ]
NMI handler is stored in the file /SYS/NMI.SYS ... -
80x24 mode (Timex required)Hopefully Martijn will be adding this to the archive soon, but until then grab it here: [url]https://dl.dropbox.com/u/15659782/BASIC80.zip[/url] Th…
... paged in to put text on it, and the normal screen area ... Basic they're not stored in the top 16K of RAM ... to print the text slower in 64 column mode than ... BASIC80 does in 80 column mode. 85 ... screen size is 480x192. In SE BASIC the draw commands ... -
80x24 mode (Timex required)Hopefully Martijn will be adding this to the archive soon, but until then grab it here: [url]https://dl.dropbox.com/u/15659782/BASIC80.zip[/url] Th…
... in to put text on it, and the normal screen area ... Basic they're not stored in the top 16K of ... screen size is 480x192. In SE BASIC the draw ... channel uses ROM charset, in 85 column channel uses another ... You can PLOT and draw in BASIC64 in all screen, but can ... -
Diagnosing a strange software fault in a 48kHi, A friend gave me a 48k, which I am very keen to restore. The spectrum 48k was my first computer over 20 years ago and I owe my ability to code t…
... we can test higher ram in 16K mode by shorting pins ... 48k mode is a value stored in the system variables that tells ... of what value is stored in the system variable.
So yes ... -
Police Patrol II loading screen is wrong[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027244[/url] the loading screen is actually an in-game screenshot.
... program expects the first byte in each row to contain a ... game and have a space in the type code. The program ... three options on each screen, stored in variables J,K,L. If ... Constable?" screen and POKE 32363 (variable J) with a valid location ... -
Police Patrol II loading screen is wrong[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027244[/url] the loading screen is actually an in-game screenshot.
... expects the first byte in each row to contain ... game and have a space in the type code. The ... three options on each screen, stored in variables J,K,L. ... ?" screen and POKE 32363 (variable J) with a valid location ... that would be useful in order to play the whole ... -
Needing a Timex 1000 ULAHello all! A friend of mine needs a Timex 1000 ULA. Anyone willing to sell one or who could point me at a place where he could buy some at a fair co…
... of the screen. Also stored in a system variable called MARGIN (address 16424 ... -
BIFROST* for graphic artists - part 1Using multicolor requires 2 very different skills: [I]programming[/I] and [I]graphic design[/I]. I already wrote several tutorials about the former …
... specific tiles can be stored in compressed format. Whenever the ... perhaps even somewhere else in memory). If stored in disk, they just ... into a small temporary area before uncompressed. If it ... disable BIFROST*, paint playing area attributes as black (to disguise ... -
pathfindingworking on pathfinding in the game. here is Russian description of Lee's algorithm: [url]http://algolist.manual.ru/games/wavealg.php[/url] "if-then"…
... will require an additional memory area of 24*32*2=1536 ... some time to update this area whenever a position is added ... . Therefore the total temporary area for A* in a 24x32 map (including ... &postcount=44"]#44[/URL] in variable terrain, using a single source ... -
pathfindingworking on pathfinding in the game. here is Russian description of Lee's algorithm: [url]http://algolist.manual.ru/games/wavealg.php[/url] "if-then"…
... the focus of this thread in a more productive direction...
70 DIM d(22,32): LET d ... -
Machine code assistance please #1Dear all, Learning the ropes here, so please excuse these odd questions which may seem simplistic to you learned lot. This routine is placed at 33…
... it, pasted the same code in location 40000 and it's ... print the 16-bit value stored in 16-bit register BC. Or ... x=USR 30000, then BASIC variable x will hold the value ... 40000, and set a breakpoint in ZXSpin debugger at address 40000 ... -
Spike: 48k onlyDoes anyone know what's going on with Spike? [URL=http://s1142.photobucket.com/user/daveyboyhughes/media/spike_zps232a1745.gif.html][IMG]http://i114…
... loader/actual game data is stored in an encrypted form, with some ... content from a specific ROM area-- the problem being that it ... isn't, in fact, the same across various ... -
Spike: 48k onlyDoes anyone know what's going on with Spike? [URL=http://s1142.photobucket.com/user/daveyboyhughes/media/spike_zps232a1745.gif.html][IMG]http://i114…
... loader/actual game data is stored in an encrypted form, with some ... content from a specific ROM area-- the problem being that it ... isn't, in fact, the same across various ... -
IF1bis StabilityI just thought I would start a different thread relating to the IF1bis, and leave the copyrighters to it elsewhere...:-P I've had mine for a few mon…
... ), despite being fully in order after assembly, stored in an ESD-safe bag ... />
One should also keep in mind that edge connectors are ... sufficient for their typical application area (PC expansion cards), while with ... -
ZX-Paintbrush 2.3 publishedDear readers, Today, I published version 2.3 of ZX-Paintbrush. Inspirated by kgmcneil, I decided to follow his ideas and implemented a switchable p…
... 8x2 and 8x4 support in ZX-Paintbrush. In particular, I'm ... this 8x2 multicolor project[/URL] in about a month. Also ... enough.[/QUOTE]
In theory, it should be no ... the horizontal resolution is stored in a common variable 'attributeheight' which is ... -
Getting aquainted with the IF1bisToday, fifteen days after dispatch, the IF1bis arrived at my door. In perfect order. No customs, no TVA and no handling fee involved. The arrival of …
... printing neatly ends up in files found in 'my documents'.
... oldfashioned 'redirect' command must be stored in a file with a fixed ... name and a fixed position (in the familiar C:/tmp/ ... has changed in the 1bis workspace or in the channels/variables area. < ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> inc hl ; next position in variable name
ld a, ... /> pop bc ; unstack new area length
pop de ; ... unstack new area pointer
pop hl ; ... add new string to variables area
pop bc ; ... -
IF EXIST?In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not. There are any way to check it out from BA…
... of a directory is variable (and may be quite ... B = Number of completed entries in buffer, 0...n.
... the machine stack resides in this area (unless
the ... /> (right).
In BASIC (using DOS)
(after ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> bit 7, h ; statement in editing area?
jr z, line_new ; jump ... /> ld hl, -2 ; line in editing area
ld (ppc), hl ; ... :
call look_vars ; variable exists?
; THE 'VARIABLE IN ASSIGNMENT' SUBROUTINE
Spin Emulator +D BugHi there, I think, I found a bug in SPIN Emulator. If I select +D Disk emulation and insert a disc into Drive 2, CAT 2 gave me the wrong number of fr…
... =Stefan;733786]Poking the system variable based on the disk inserted ... not the +D system file stored in Spin?
If the system ... file is already loades (as in Spin, no cheating with this ...Graphics questionHello. I was wondering, does anybody here know of a method to display a large (as in, the better part of the screen) bitmap/raster image using ZX Sp…
... -23607) to any address in memory and use 96 font ... as it is written in Assembler and so very ... :
[code] 10 DIM a$(96): FOR n=1 ... />
Characters must be stored in the RAM starting from 32768 ... . In this case, 21 lines ...Z80 Asm EditorHi, I think this goes in here but if not then the mods can move it.... :) I have been knocking up a multi-tabbed, customizable docking editor for w…
... the assembled program is split/stored in memory (e.g. based on ... /> Coupla ideas:
Highlight an area and it will tell you ... where bytes are stored.
Let the user type in alternate things ... output be shown? In the editor or in a console window? Does ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... I also do not believe in "variable" frame duration, because this ... for the display available in the corresponding latches regardless ... which byte is actually currently stored in the REG.DISP, if ... returns the screen/attribute values in some way ([URL="http ...Read Data from memoryHi there. Not been on this scene for a long time. Does anyone know how to do a routine to read data from memory(peek..etc) rather than using lines of…
... BASIC Compiler:
[CODE]
dim a as uinteger
In Sinclair BASIC your code can ... this:
[CODE]
10 dim a(10)
20 for ... ,7,8,9,10 is stored in memory from address 55000 to ...Read Data from memoryHi there. Not been on this scene for a long time. Does anyone know how to do a routine to read data from memory(peek..etc) rather than using lines of…
... BASIC Compiler:
[CODE]
dim a as uinteger
In Sinclair BASIC your code can ... this:
[CODE]
10 dim a(10)
20 for ... ,7,8,9,10 is stored in memory from address 55000 to ... take a look at that in my game...Sorting BusinessThis is a little bit different from the usual game-related fare but I know there are a few people here who like this sort of thing. This is about so…
... the only changes being different variable names. To bother to change ... the variable names, they must have known ... 5000 numbers, so that differences in the sequence would only have ... of items that can be stored in memory. In that case I may ...UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... a system variable that points to where the UDGs are stored in memory ... . You can define more banks of UDGs in memory ... character set somewhere in RAM, then change the system variable to point ...
