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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…
... _flags) ; signal lower screen
set 4, (iy + _flags2) ; ... ptr_done ; jump if no change
push de ; ... incorrect code
scf ; set carry flag
ret ... ; single
or b ; character?
jr nz, report_f ; ... -
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…
... /> rst get_char ; get character
call str_alter ; change stream?
jr c ... cursor
exx ; alternate register set
ld hl, p_flag ; ... ; decrease statement counter
scf ; set carry flag
ret ; end ... -
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…
... test_0_or_1 ; get variable
set 7, (iy + _flags2) ; ... br /> exx ; alternate register set
ld hl, 0x2758 ... hl, (mem_4_1) ; address next character
ret ; return
... ld de, (mem_2_2) ; change in length of current line ... -
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…
... a, (hl) ; get current character
cp ctrl_enter ; test ... :
set 3, (iy + _vdu_flag) ; signal possible mode change
... -
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... , and except for the surrounding character border in blue in my ... routine [B]NIRVANAfill[/B] to set their [B]bicolor[/B] attributes ... enemy, you just need to change the corresponding sprite to a ... or enemy, you need to change the corresponding sprite position, and ... -
Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
... ;736403]
You just change gr_window to change the look of your ... /> In a game, I would set up a state machine for ... file, line 47. You can set a sprite's graphic directly ... a struct_sp1_Rect that indicates the character coordinates it occupies on screen ... -
Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
... and can be customized to change the memory map.
character (24 bytes). If you have ... that preserves the main register set. The second is an asm ... -
Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
... utoa and have committed a patch but I missed the nightly ... build the zx library yourself, change line 8 of [URL="http ... /> ; de = char *buffer
; carry set to write leading zeroes
P47 Thunderbolt Colour/Attribute hacking?I've seen someone (can't remember who now, sorry) hacking into monochrome games such as After The War and Outrun Europa and adding/changing the colou…
... ; as the colours don't change there can't be any ... INK colour. The attributes are set in the routine at $7ED2 ... finishes at $82A0, so a patch could be put in there ... straining on the eyes (eg. change the red & yellow on ...How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…
... />
2 bytes to set the ink colour
[16 ... /> Then 1 byte for the character itself
[32 = space]< ... using the code 16 to set the ink colour, how ... would I set the other control codes 17 ... for the paper colour and change the length of the ...ZX Spectrum code examplesThe shortage of sites with decent code examples seems to be few. The links to alot of sites that used to host them are disappearing into the ether. …
... and seeing 8 pixels being set or cleared. Each address in ... and seeing the colours change in a whole character location. The value ... you poke in will change the character colours based on this ... which are represented by the set bits in that byte.
Programming again with the ZX SpectrumI am going to take a blast at programming for the Spectrum again. Its bee a long time since I have done this. I need to refresh my memory and maybe l…
... stuck in. On a PC, set yourself up with a text ... change the border colour from machine code, and write your own character ...Tile routinesHi all, Please does anyone have any examples of tile routines in pure asm to set up maptile screens. I would like to try and understand them and ti…
... (column +1) one character space and repeats. If ... by one and column is set back to zero.
... is:
- change the routine under print_block so ... - then move right 2 character spaces, instead of one space ... You just need to change the column and row ...Spectrum screen layoutSeeing the thread on displacement I was wondering why the spectrum had the stupid screen split into three sections and the addresses for each section…
... layout would then have to change so that the Z80 A0 ... use and understand. For instance, character columns could appear in the ... consider the Z80's instruction set. It also has the disadvantage ... and the Z80's instruction set and DRAM refresh behaviour. The ...Fast and easy read/write of attributes?What are the fastest or easiest ways to check the attributes of tiles on the screen, in BASIC? It seems to be a great way of storing object info. …
... ?
Is it possible to change the Paper colour for a ... /> If you set OVER 1; and print an empty character you can ... update just the attributes. If you set either ...Fast and easy read/write of attributes?What are the fastest or easiest ways to check the attributes of tiles on the screen, in BASIC? It seems to be a great way of storing object info. …
... single change would be to change the INK colour of a character square ... -calculate it.
To change the PAPER is more fiddly ... INK 8, BRIGHT 8, a set PAPER colour and printing a ...Dock's ZX Maze gameI'm hoping to finish a simple maze game in ZX Spectrum BASIC this week, as part of the Ludumdare Retro challenge. I used to dabble in speccy basic on…
[QUOTE=Dock;774114]Experimenting more has lead me to realise the limitations in my own code, so I'm going to try to keep it as simple as possible. Next step is to get the game responding to certain tiles as collectables or switches.[/QUOTE]
...Dock's ZX Maze gameI'm hoping to finish a simple maze game in ZX Spectrum BASIC this week, as part of the Ludumdare Retro challenge. I used to dabble in speccy basic on…
[QUOTE=Battle Bunny;774142]Here's some extracts from a program which I've been working on recently, which illustrate some methods to consider. An exhaustive commentary follows ...
[code]
35 LET j1= 0: LET j2=-1: LET s=1: RETURN
...Latin-1 font for FZXI'm currently creating some [URL="http://en.wikipedia.org/wiki/Latin-1"]Latin-1[/URL] (ISO 8859-1) characters to be added into [URL="http://www.world…
... a good idea to change the Spectranet character generator to the FZX ... install a desired font and set a code-page (for UTF ...Change PAPER and BORDER colours from machine codeHow do you go about changing PAPER and BORDER colours from machine code? I've forgotten the system variables for border and paper.
... address of each character row. The first character is at ... the vertical position of your character, doubling it, and ... of the character you want in L, set H to ... is that we undo that change to DE (at least ... screen memory, within a character space, each byte is ...analysing program variable usageIf I wanted to count the number of times each variable is referenced while a program is running (not the number of times each variable is referenced …
... relies on being able to patch the ROM. It's ... BASIC program to be analysed, change the "CALL $2C8D" at ... br /> dec hl
set 7,(hl) ;mark last letter ... name[color=blue]
set 5,a ;*;lower case letters ...Command and Conquer type game?Hey all One of my all time favourite games although not spectrum based, is the Command and Conquer series. I'm sure many of you are famailiar with…
... demo will simply interpret every character position with dark PAPER (i ... can simply reset the maze, set new goal positions, then run ... so. This is a simple change really, I just didn't ...ZX-Paintbrush 2.5 publishedDear readers, as there were many updates since the last version, I want to bring this to public, so that I hopefully can return back to ZX-Assembler…
... The alignment of the character grid with the raster ... ( 8x8 ), then select and character block from the screen, CTRL_C ... on the right to set the raster size to ... be interferences. I will change this as follows:
... the raster size is set to 8x8, the rectangular ...Detecting flash mode inversionsIs is possible to detect with certainty when flashing characters change from normal to inverted and vice-versa?
... to change slightly depending upon how many characters were set to ... ]
[code]; flash a character-based rectangle
; PRINT ... will be -1 after segment change, else 0
inc ... avoid double increment after segment change
ld d,a< ...Snowfall effectHow do you go about creating a snowfall effect like the one in Yeti? Now don't laugh, I'm currently printing 32 UDG's of dots OVER the top of my gam…
... +1),top_of_screen ;carry not set, we've reached the ... +2) ;for visual variation, change snowball bit, probably not necessary ... , then the bit to set for the snowball. Values ... /> ld a,l ; 8 character squares per segment.
rlca ...Speccy Vs Amstrad CPC Vs C64I hope no one minds me posting this here as well as in the announcements section. I'll delete it if there is a problem. It's childish fun but can I …
... pixels of data - an entire character width with only a colour ... there's another colour change (and another set of 6 'blank' ... pixels).
It can change the ... , since any colour change uses an entire 6x8 character space.
< ...Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…
... which means you enter one character at a time and cannot ... /> ioctl(fd, IOCTL_ITERM_TIE, output_terminal);
- change the output terminal to which ... (fd, IOCTL_OTERM_RESET_SCROLL); // set scroll_limit to window height, maybe change this to accept ...FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... mask. Wherever the mask has set bits, the corresponding attribute bits ... :- I will probably have to change it. What is happening now ... and insert spaces between each character to do a justification?[/B ...FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... run faster if you simply change all attributes in a square ... full width of the individual character regardless of whether there are ... a solid colour. If you set up a mask such that ...FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... prefer using (a minimal set of) escape codes, and ... does AT, AT relative, TAB, change colour, etc.
character amounts.
... sequences in the new set of low level code ... available as minimal a set of things that people ...
