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Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... the main screen at least row-by-row as the UDGs are drawn ... give a full 16-bit address of each UDG, allowing for ... -
Understanding DRAMI think I am going slightly mad. My hardware knowledge has got more rusty than it should have done, and I am going to have to turn to the experts to…
... bits. They are addressed by address lines A0-A6 which ... allow us to address 128 rows and 128 ... This time, we have address lines A0-A7 which allow ... us to address 256 rows and 256 ... This will either be the row address, or permanent high/ permanent ... -
High score table routineI wrote this general purpose high score table routine. It stores 5 scores and displays them alongside the player names, which are 8 characters long. …
... br /> ; with some code by Jonathan Cauldwell
; ------------------------------------
address pointed at by HL
row's address
... />
PRINTNUM: ; routine by J. Cauldwell
... -
Anybody fancy coding this?blah de blah de blah Please ignore, poting error.
... when you select a memory address, say, 16384, all eight 4116 ... these chips can be detected by the routine in the start ... (this could be caused by faulty row/column address selection in the chip ... logic has failed, the memory address being influenced when you set ... -
Anybody fancy coding this?blah de blah de blah Please ignore, poting error.
... (this could be caused by faulty row/column address selection in the chip ... logic has failed, the memory address being influenced when you set ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... row by writing bytes to the display address and adding one to the address ... one pixel row by writing bytes to the buffer address, adding one ... the destination address for the next pixel row. I think ... a new destination address for the next pixel row.
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... s map is a 5 row by 9 column array of ... br /> uchar *screen; // +8 address in display file where this ... . The pointer (address) "g_puchar" is incremented by one byte to point ... the byte from the original address in "g_puchar" before adding ...Jetpac LoadingI have Jetpac on tape for my 48k and can't get it to load. Here's what I'm doing...Press L to get load screen then "jetpac" and Enter while pressing…
... rather odd thing to do by accident...[/QUOTE]
Heh ... should I say select the row by writing to 0xfd with OUT ... switching pages depending on the row address in A.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…
... /> push hl ; save the screen address for later...
; ****************
rrca ; multiply row by 32.
rrca
rrca< ... byte.
ld l,a ; address of screen position in de ...Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... the multiplexers that give the row/column address bits from the CPU ... the CPU in reset state (by shorting the reset pin to ...New NIRVANA+ feature: wide tiles!The size of each bicolor tile in [b]NIRVANA+[/b] is 2x2 characters (16x16 pixels), like this: [img]http://i60.tinypic.com/mw358y.png[/img] [i]* M…
... but hey. For each row, draw most frequently used ... I need for each row and insert it into ... which then renders that row of every tile on the ... 8-pixel offset by moving the start address, you get closer ... to render each row.
By all means give ...Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…
... walk the screen column by column and row by row, blanking and restoring each ... right... */
for ( row=0; row < 24; row++ )
{
for ... screen address of the character.*/
char_address = zx_cxy2saddr(col, row);
Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…
... again on the next pixel row, by which time you could have ... is the ULA hogs the address bus for 6 out of ... draw part of the next row of colour data just behind ... appears to change over one row.How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... (ix+3), 0 ; and the row to 18
airloop ; ld ...
; NEED TO DO THE ROW CHECK BEFORE CALLING text_out
cp 24 ;check row < 24 before calling text_out ... checkerboard pattern at column 31, row 23
ld a,5 ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... /> ld l, b
; multiply row by 32
add hl, hl ... /> ld l, b
; multiply row by 32
add hl, hl ... /> ld l, b
; multiply row by 32
add hl, hl ... -coord
; push the table row address
push hl
; look ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... ][/url]
Got annoyed by Spin giving me grief today ... a table lookup for the row address
; DOES NOT check for ... -coord
; push the table row address
push hl
; look ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... /> ld l, b
; multiply row by 32
add hl, hl ... /> ld l, b
; multiply row by 32
add hl, hl ... /> ld l, b
; multiply row by 32
add hl, hl ... -coord
; push the table row address
push hl
; look ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... l, b
; multiply row by 32
add hl, hl ... />
; B -> row
; C -> column
; multiply row by 32
add hl, ... l, b
; multiply row by 32
add hl, ... l, b
; multiply row by 32
add hl, ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... hl, de ; hl = screen address of top row of char
ld ... of, it is incremented by 8 by the end of the routine ... table to get the screen row starting address and the old one ... get the starting address of each character cell row instead. So they ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... hl, de ; hl = screen address of top row of char
ld ... of, it is incremented by 8 by the end of the routine ... table to get the screen row starting address and the old one ... get the starting address of each character cell row instead. So they ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... /> ld l, b
; multiply row by 32
add hl, hl ... /> ld l, b
; multiply row by 32
add hl, hl ... /> ld l, b
; multiply row by 32
add hl, hl ... -coord
; push the table row address
push hl
; look ...4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…
... the left) of the flickering row. This makes me think the ... of the presentation of the row /column address or of the ULA ...SpecBAS really needs a manual!That Word doc that I converted to an RTF for you Dunny and ASH-II, is still somewhat sparse. I spent bloody hours PLOT/DRAWing a landscape to steer m…
... string, such as that created by WINDOW GRAB), the transparent ... When creating a graphic bank by specifying the width and height ... memory represents the bitmap surface, row by row, top-left to bottom- ... drawn line appear 'solid' by not letting the cursor/sprite ...StonkersEverybody on this forum knows that "it's definitely not Stonkers" joke, which can be found in almost every topic. My question is: why "Stonkers" was…
[quote]
On 2006-02-23 15:47, PopoCop wrote:
Exactly! :)
[/quote]
Maybe he genuinely said it in two replies in a row by accident and decided to make it into a running gag.StonkersEverybody on this forum knows that "it's definitely not Stonkers" joke, which can be found in almost every topic. My question is: why "Stonkers" was…
... in two replies in a row by accident and decided to make ...How do I get noticed on search enginesHaving just launched my own feeble website to support my own feeble business... [url="http://www.newromneymowers.co.uk"]www.newromneymowers.co.uk[/u…
... ]
which mentions you by address but does not link to ... to them.
Stick your address on the website.
Get ...New - BASin r13a is available for downloadHi all, Here's the latest BASin. Mostly just bugfixes, but also now has the upgraded UDG editor which can now edit multiple UDGs on one editing gri…
... , or 24 pixels by 21 pixels. Sprites are stored row by row - in this ... example, 3 bytes for the top row, three ... ? Interleaved bytes? ie, row of 3 sprite bytes, row of 3 mask ... bytes etc, or 1 sprite byte followed by ...Stranded 2.5.Following it's appearance in Shed issue 3, the first demo of Stranded 2.5 is now available at... [URL="http://www.bobs-stuff.co.uk/S25_1127.tzx"]htt…
... levels in it in a row by using the challenge mode. That ...Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…
... ). Currently it reads the codes row by row and displays the graphics accordingly ...
