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MIA: Sir GawainAs previously announced, here's the release of Sir Gawain, a Microhobby type-in program. Included in the archive is the .TZX with the generated bina…
Maybe it is a good idea to include scans of the original type-in? It looks like toe width of the Attribute data is too small by one byte. -
ANNOUNCE: JSW64: Flash Manic MinerI am delighted to announce the gamma-release of [b][i]JSW64: Flash Manic Miner[/i][/b], which is available as a free download from [url]http://geocit…
... amoebatrons were originally the Bug-Byte logo, so I changed ... no changes between the Bug-Byte and Software Projects editions of ... fourth item has a colour-attribute of 255, which terminates the ... mower thresher of the Bug-Byte edition to the impossible triangle ... -
Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... attribute file) is tested in the above version and then every byte ... -
Machine code and Basic system variablesSpectrum system variables (I mean 48KB model) are essential for Basic. But what if I started my machine code program and it's never going to return t…
... effectively use every byte of memory after the Attribute File (23296 - 65535 ... -
MultichromeIt turns out that multichrome, and other screen modes, are emulated in Fuse and Eightyone via ZX Spectrum SE emulation (which is similar to the TC214…
... . However, both screens have per byte attributes, rather than the usual ... it's using an 8x1 attribute mode with two screens?
Would welcome ideas for my large map game...I have been working on an engine to allow scrolling around a large map. For now, it allows 1 char movement around a 64x64 map made up of 4x4 char t…
... /> Byte 1, Byte 2, Byte 3, Byte 4
Byte 5, Byte 6, ....
...
Byte 29,Byte ... 30,Byte ... haven't really done full attribute sprites before, so I'm ...Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …
... defined attributes). Each attribute relates to the equivalent byte of the UDG.Tips on optimizing some newbie assembly routinesI'm starting to learn some assembly language. The best way to learn is to actually code something you are going to use, so I'm creating a very simple…
... them as the first byte of data of all ... characters, then the second byte of all 256 characters, ... H with the high-byte of the address and ... add an attribute for each character as a ninth byte, instead ... register set to maintain an attribute screen pointer (note EXX ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... . There are always two byte fetches to draw 8 pixels ... /> 1) In spectrum mode, the attribute area address is redundantly generated ... 32x192 colour resolution. The attribute area is now the same ... -res mode, the second byte fetched is also treated as ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... CLUT? Maybe right after the attribute space?[/QUOTE]
... timed to make two byte fetches prior to drawing ... you'd need another byte fetch in that same ... ) to fetch the third byte, not due to techincal ... (note the change in byte fetch order) while at ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... is timed to make two byte fetches prior to drawing ... area and one from the attribute area. If you want ... you'd need another byte fetch in that same ... cycle) to fetch the third byte, not due to techincal ... block (note the change in byte fetch order) while at ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... 32x192 mode uses the second byte as attribute as in the usual ... mapping pixel addresses redundantly to attribute addresses (so each 8 vertical ... pixels map to the same attribute address) we map each pixel ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... thing is, even in 8x1 attribute mode, there's really not ... , 0x3b ; set low I/O byte
xor a ; first register ...Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…
... /> 53 ; d1ff - d1ff SP1.LIB attribute buffer
54 ; d1f7 - d1fe ... map suggests placing the 257-byte im2 vector table at address ... (0xd000, 0xd1, 257); // initialize 257-byte im2 vector table with all ...Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …
... of Word bytes, the first byte of each representing the start ... , and each Word byte itself represents a environmental attribute... So, in our ...The Making Of Manic Miner"Matthew Smith talks us through every level of his classic platformer Sat at the very desk where it was written, Matthew Smith watches Miner Willy l…
... data
6E03: last byte of level data
B800: Back attribute buffer, has attributes for bottom ...
BA00: Collision map, not attribute based like original game
* Non-attribute based collision, so can do ...Please test my Manic Miner remake!Thanks to everyone who downloaded my sneak preview of Manic Miner Turbo. Thanks especially to na_th_an who is the only person so far to give feedback…
... /> ld a, (de) ; get the attribute value
ld c, a ... /> ld bc, 32*8*24 ; byte count
ldir ; block copy ... need to XOR the high byte with #e0 to map from ...Help fix this keyboard read program?This code runs in an interrupt routine with DI. What would be the simplest way of making it so it doesn't auto repeat a keypress? [code]keys: ld a…
... , which holds the low byte of 22 attribute addresses. I save b ...Easy way to print text in machine code?Please? It sounds so simple, but I've never done it. At the moment I'm grabbing the start address for each letter then printing them out one at a t…
... of third to upper byte, because one thirds ... /> rrca ;fact that lower byte is same
rrca ... ;DE now keeps adress of attribute
ld ... a, (text_attr) ;get attribute
ld (de), a ;and ...Image to ZX Spec 1.1 Now Freely Available!Image to ZX Spec 1.1 Now Freely Available! [IMG]http://mirror.viperfang.net/silentdevelopments/images/ent-preview1.1.zx.png[/IMG][IMG]http://mirror.…
... pick up any slack (notably byte manipulation in export can be ... palette then at step 3 (attribute choice) I can divide the ...tricks to simplify codingWhen i started with programming in assembler i had very simple approach to do things. Just shifting bytes around, doing simple tests and so... Later …
... /> uchar attr_mask; // +6 attribute mask logically ANDed with underlying ... attribute, default = 0xff for ... for 2-byte graphical definition else 1-byte, bits 2 ... graphic into an 8-byte buffer where the ...New member here. And a spider! :)Hello everyone. My name is Sekrets. I'm quite a lonely individual, searching for a digital home where I might find fellow speccy enthusiasts to adopt…
... , zx_pxy2aaddr (pixel x,y to attribute address) takes a pixel coordinate ... returns the address of the attribute square the pixel lies in ... indicated. The return value (an attribute address) is in HL.
byte, write the sprite data there ...'Hello World' in ASM ?Can someone show how to make the classic 'Hello World' print with ASM code ? I cant figure at this moment how to insert and handle strings with the s…
... the screen. The less-significant byte is the number of character ... gives the bottom third. (The attribute table is at 88-90 ... in ROM crosses a 256-byte boundary.
inc l ...Merlin has risen from the grave!Those of you following the Merlin saga [thread=29902]over here[/thread] might be slightly interested to know that the program is now available in the…
... ' attribute data but it's platform attr. data (word[address],byte[ink],byte ...Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
... screen data and one byte for an attribute.
What you ... first drawn to the 8-byte character buffer at SP1V_PIXELBUFFER. Then ...Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... you want. Some examples change attribute data in the screen area ... +1, that causes the same byte to be copied over & ... block with that byte. Together with that 1st byte you put, a ...TIMEX 2048: anybody can convert GIGASCREEN?Hi. Timex 2048 has stable GigaScreen (no flickering at all). I know there are several big TC2048 fans on the Forum. Could anybody write a viewe…
I remember there was a 8x1 multicolor mod for Spectrum 48K, but I cannot find the link anymore. It was rewiring of ULA to get Attributes from 24576 and get one Attribute for each screen byte.TIMEX 2048: anybody can convert GIGASCREEN?Hi. Timex 2048 has stable GigaScreen (no flickering at all). I know there are several big TC2048 fans on the Forum. Could anybody write a viewe…
Machine code issue...Hi Folks, My trials with MCODE continue and I am stuck. I wrote the following program in BASIC to simply POKE an attribute byte in to a "box" on th…
... paint a rectangle with an attribute is pretty solid.
< ... as uByte, height as uByte, attribute as ubyte)
asm
Byte
ld a,l ; We ... ; Add it to the Low byte
ld l,a ; ...Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…
... SPR_xpos equ 0 ; BYTE
SPR_ypos equ 1 ; BYTE
SPR_def ... ------------
ld hl,22528 ; Attribute address
ld bc,768 ... br /> inc hl ; Next attribute location
dec ... ld a,(de) ; Read pixel BYTE
inc de ; Must ...
