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The 20th comp.sys.sinclair Crap Games Competition thread!Hi all, [SIZE="7"][B][CENTER]ANNOUNCEMENT![/CENTER][/B][/SIZE] The comp.sys.sinclair Crap Games Competition 2015 is now well and truly OPEN! [url]…
... how much bordertime (I don't use T-States!) it takes BASIC to ... deal with. I certainly couldn't do any better. One day ... -
draw single pixel in the borderI have problems with drawing in the border. I can get it to draw a line ,but it always becomes a line and not a single pixel. <br><br>rept 3580 <br…
... travels in how ever many T-states OUT takes. If the Z80 ... line, but alas it isn't so you can ... -
Fuse tests - INC BC causes contention delayHi all, In the FUSE test suite it has the following for the output of opCode 0x3 (INC BC): 0 MC 0000 4 MR 0000 03 4 MC 0001 …
... each of the last two t-states. Paradoxically this happens because there ... -
Basic SAVE and ZX Printer supportIs there a list of emulators that support any of these two features (basic SAVE and print to printer port)? Is there a emulator comparison some wh…
... following structure:
- PULS 2168 t-states
- DATA bytes: "fillscr" CODE ... 32768,156
- PULS 2168 t-sttes
- DATA 1264 bits ... 4 times, but BASIC, doesn't seem to ever finish loading ... -
maths help 'JSW'JET SET WILLY uses a lookup table to play the opening tune (Moonlight Sonata) this is the table [code] 34299 DEFB 81,60,51,81,60,51,81,60,51,81,…
... pitch he wanted - I can't see any way to go ... -versa unless you start counting T-states for each possible note. To ... the number of t-states in that routine with the t-states used in ... -
Game development guidesHello all, I want to get into game development for the ZX Spectrum and would like to know where I can find some helpful guides. I've looked around t…
... ; save 3 bytes and 10 T-states
[/code]
The ... -
Game development guidesHello all, I want to get into game development for the ZX Spectrum and would like to know where I can find some helpful guides. I've looked around t…
... DJNZ takes (usually) 13 states, and the outer loop ... n + 14 * (n / 256) T-states)
Another mistake is ... "This only takes 28 T-states for if. A small ... takes 31 T-states, not 28, saving just 2 T-states and ... 2 bytes (and no T-states) if the initial one ... -
Game development guidesHello all, I want to get into game development for the ZX Spectrum and would like to know where I can find some helpful guides. I've looked around t…
... mistakes: DJNZ takes (usually) 13 states, and the outer loop is ... (13 * n + 14 * (n / 256) T-states)[/quote]
Actually it ... (13 * n + 9 * (n / 256) T-states), approximately. Every 256 iterations, the ... -
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…
... , NIRVANA_fillC, NIRVANA_readC) are now 3 T-states faster each. The addresses of ... download this engine update, don't forget to also download the ... -
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…
3 bytes, 3 t-states does not sound a lot, but with the time critical routines in Nirvana it is a matter of the colours working or not. Well done indeed for improving them. -
Advices for double buffering ?Hi, I'm currently coding graphics routines for a forthcoming game, I use a double buffer (the dummy screen is at $e000, the code at $8000) to pro…
If your screen update doesn't take longer than 1-2 ... screen area at around 15K T-states, so e.g. you ... begin. In fact it doesn't really matter where [i]exactly ... so that the beam doesn't catch up with you ... about 90-93K T-states, a frame is about 70K T-states so by ... -
Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…
... always enabled, otherwise it won't work properly.
Actually ... so much control about execution T-states, so this problem is more ... -
Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…
... install script didn't work, so I don't have that defined ... so much control about execution T-states, so this problem is more ... -
Small Machine Code Routines Which Maybe UsefulAs part of creating Flynn's Adventure in Bombland I created a lot of little routines to do all sorts of things. A lot of these I created based on inp…
Here's a T state delay routine, might come ...
; Usage: HL=delay, T states; HL > 123
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... measuring where in the frame (t-states) the #FF routine triggers, then ... . This happens at approx ~14500 T-states into a spectrum frame.
T-states, ie if it is entered ... exit at approx 14,500 T-States. It checks for the floating ...New multicolor engine BIFROST*2[img]http://s15.postimg.org/rfue0jb3v/BIFROST2.png[/img] [b]BIFROST*2 ENGINE[/b] is now available! Download it here: https://www.dropbox.com/sh…
... beeper effects in under 10K T's[/quote]
OK ... so, multicolor engines leave 20K T-states free or less (depending on ... many multicolor rows). Spending 10K T-states on beeps is probably too ...Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…
... bytes for a few less t-states, is it really worth it ...Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…
... really exploiting the full 224 T-states available on a line; certainly ... , where there'd be 20 T-states spare.Manic Miner ported to Atari 800XLYep, they finally ported it :) http://atariage.com/forums/topic/252067-manic-miner-released/
... cartridge to use BASIC) weren't too impressive graphically, from what ... hardware registers, the display isn't memory mapped.
... the fact that there aren't any hardware interrupts to ... its all down to counting t-states.
Which makes ...Manic Miner ported to Atari 800XLYep, they finally ported it :) http://atariage.com/forums/topic/252067-manic-miner-released/
... the fact that there aren't any hardware interrupts to tell ... its all down to counting t-states.[/quote]
Interesting. It ...P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…
... ready available resources, don't exist per se, but can be inferred ... of game, but I don't.
TIP: If someone ...P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…
... instructions, which amounts to 16T states per each screen byte (8 pixels ... faster, which amounts to 13T states per each screen byte, and with ... it might go to 12T states per byte, not sure if it ...P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…
...
3. In about 69888 T states (frame duration on a 48K ... /> 224 is the number of T states in a single-pixel horizontal ... 20 * 8 * 224 is the T state 'duration' of the active ...ZX Dandanator! Mini - Cartridge system for SpectrumsHi All, I'd like to present a little HW I've developed during the last three months. It's aimed at providing a console-like usage experience for a…
... />
CMDLOOP: ; Add extra 110 t-states for ~50us pulse cycle (109 ... all data lines, this doesn't make sense.
I ...Reading sequential key pressesI am thinking about writing a quick game and have an idea that requires me to read alternate key presses. I’m thinking along the lines of Daley Thomp…
... ="joefish;868228"]Another thing - don't wait for a key to ... what I need. I don't think it can be sped ... anyone can shave a few t-states from the key reading / flag ...IXL and IXHI don't know much about undocumented instructions but I get the impression that [b]LD A,IXH[/b] or [b]LD A,IXL[/b] (B, C, D, E also fine, HL not) are…
... HL instruction plus 4 more T-states. That's because they're ... HL instruction plus another 12 T-states. As well as the prefix ...Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…
... storage. Everything you don't currently need in the CPU ... /> Learn how to count T-States and some common optimizations on ... on the Z80, don't use IX and IY ... / instructions take 19 to 23 T-States!
Use HL, BC ... LD A,(HL) is 7 T-States
LD A,(IX+o ...
