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maximum addressable RAM for a Z80 using bank switching?What is the maximum addressable RAM for a Z80 using bank switching? The Enterprise64 home computer could address up to 4MB, is this the limit for a …
... 74LS170 register (4x4 bits) mapped to a spare I/O port ... , and used this to map a 128K SRAM. I ... spectrum, adding a RAMCS line to a spare line on the expansion bus ... . I wrote a RAM disc program for it, and it worked ... -
New game: Pitfall III wrath of KingcrockI'm releasing this new 'divertissement' made by Gabriele with AGD on behalf of him. The game is a platform affair where you should pick up the four p…
... quite a few goes to see more than two ... screen I occasionally seemed to get slightly trapped in ... facing) when I wanted to go out of the screen ... is short I wanted it to be difficult
Really ... sort of excercises to learn how to program and to see what can ... -
The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... it with some other line to determine whether to trap certain addresses, dependent ... schematics hard to follow.) In any case, though, the line from pin ... 't always tie in with how the Spectrum and DISCiPLE software ... , I just can't see how they can be right, even ... -
The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... reading the last sentence how I want to read it - and face ... the latter - how the heck is this supposed to work on a ... Spectrum for a 128K PROGRAM to be saved to disk. Every time
program will appear to be frozen again. If ... -
Just a curiosity of mixing synth with samplesThis is really a proof of concept, I made for the idea of playing simultaneously two ZX Spectrum computers, where one is playing chiptune music and t…
... not my case. I tried to program some tracks on Vortex Tracker ... st trackers are probably easier to start off with..the very ... ..
pattern length.. how many lines of code you ... tune = pattern list. just "gosub" to the patterns
instruments ... -
The Official Crap Games Competition 2013 Thread!Just to announce that the 2013 CGC is OPEN! [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/cgctitle2_zps77591934.jpg[/IMG] And for th…
... 't yet written a single line of code, just dreaming up ... I can't be bothered to program it.
I need ... to shake this lethargy as didn' ... -
Font hack that was used in a lot of early gamesThere was a little hack for changing the fonts on a spectrum and I remember it being used in a couple of old games on the 48k, it was a sort of ye od…
... 693367]Setting the linenumber to 0 will not ... length of the first line to an invalid value will ... but that will prevent the program running correctly at all. It ... a line 0 will prevent an auto-RUN program from ... a program will auto-RUN OK but attempting to MERGE ... -
Designing an icon-driven adventure: looking for adviceHi fellas, after the release of Funky Fungus, I am currently contemplating the possibility of designing an icon-driven adventure with location graph…
... some new functions, in comparison to ordinary Sinclair BASIC[/QUOTE]
program code be only one long ... etc. like an ordinary BASIC program?[/QUOTE]
You can ... files. It just depends on how you prefer to organize your work. -
Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…
... — I don't know how I managed to miss that out! I ... active. Its 'chip enable' (/CE) line is only ever high if ... 't the sole input to the /CE line of the 'ULA ROM ... and 6, respectively) seem to be connected to the 'main part' of ... -
Problem with DIY Kempston Joystick InterfaceHello, Decided to try out Yarek's Kempston joystick interface: [img]http://8bit.yarek.pl/hardware/zx.joystick/kjschem.gif[/img] Having a few issues.…
... :) Thanks for taking the time to adjust the schematic and especially ... size :)
How hard would it be to implement a switch ... numbers and then decodes them to the corresponding numbers on the ... Cursor.
Would I need to program some sort of 'OR' or ... -
Identifying the authors of classical beeper tunesDear all, I am currently working on a small demo, a compilation of some classic beeper tracks from ZX Spectrum games dated between 1985 and 1992. Alt…
... used the two voices to create a thicker synthy ... appreciate you taking your time to explain this. Actually, ... was a kid learning to program in the 1990s, I ... beeper routines and learing how they achieve so much ... people with an opportunity to listen and wonder at ... -
inline z80 with sdccI cant get it to work at all: #include <string.h> char test[10]; void main(void) { strcpy(test,"testing"); _asm ld a,32 _endasm; } this produc…
... memory.
How do you dereference a void ... know how many bytes to read. In the program you ... must first cast the void* to something ... -- p++ -- adds two to the memory address p. Incrementing ... compiler does not know how big those things ... -
Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…
... abusing stack commands in order to manipulate the screen, say ... know how it is. You keep trying to bend the ... "dirtier" solution compared to using a ROM routine ... Any major update to ROM is likely to break both ... 's a fairly thin line to walk, all things considered ... -
Loading basic from basic?Hi Guys, Could you please help me. I want to create a menu on my plus 3 disks. If I use the line below I just get "c nonsense in basic" if inkey$…
I never thought that someone would NOT add LINE to the BASIC that is loaded!
You want to start the program, so LINE is default added to the program. -
New game: The curse of OddvilleDon't get too excited! :p Just wanted to share this because the coding of it is driving me mad, or rather the game designer is. The curse of Oddvil…
... file from the data to port to the Speccy?
... t have a clue how new computers work ... than just to me). I only know how to program Z80 asm ... over the "playing screens" to restore object locations.
to decompress them to the "playing screens ... -
New game: The curse of OddvilleDon't get too excited! :p Just wanted to share this because the coding of it is driving me mad, or rather the game designer is. The curse of Oddvil…
... t have a clue how new computers work (though ... than just to me). I only know how to program Z80 asm, ... /> It should allow you to implement the CGD editor entirely ... a PC, without having to worry about memory limitations ... It would just need to generate a ZX-Spectrum ... -
Things we all hate.Right, we couldn't agree on a video game, a TV program, or even a food we all liked. So to have one last stab at agreement, here's a thread to find o…
... on similar lines,with regard to the silly amount I'll ... person in question dropped the line about "people starving in africa ... , I didn't see how it related to people mindlessly damaging property ... bad taste.. but it's how the ad is constructed word ... -
Math problemI'm trying to solve/model a science problem, and I thought a simple BASIC program might help me, but I struggle to write it. Goal: Given a length of…
... array. Then the easiest way to program a sort (not necessarily the ... (unless that would reduce n to 0) and test again. ... [/B] manages to be non-intuitive and to perform badly at ... Assembly implementations. And here's how to implement it efficiently in Sinclair ... -
Math problemI'm trying to solve/model a science problem, and I thought a simple BASIC program might help me, but I struggle to write it. Goal: Given a length of…
... beginner to program. You do have to think a bit about how a ... , the actual algorithm is trivial to program.
Skimming ... lot more complex to program as you have to remember what ... beginner would have to make notes to program that as an algorithm ... -
Spec dev in the eighties and ninetiesWhat different ways were there of making speccy games? There is the 'worst' way which is typing in hex commands in Basic unreadable, easy to make m…
... was some device which attached to the edge connector and wrote ... that it used the BUSREQ line to disable the Z80 whilst the ... now, I can't see how that would work without other ... -
Serious SpectrumHas anyone here used their Spectrum for anything other than gaming and programming back in the eighties? I see all these business and productivity ap…
... to do something like that on the Sinclair.
The First program ... in strings: one line per participant in ... a program (that was even obliged to use) ... took a year to program to come to the same level. ... SINCLAIRDATA is still related to my processing results.< ... -
The making of R-Type on the speccy book, free downloadBob Pape, the guy who wrote R-Type on the speccy has made his book, "IT'S BEHIND YOU: the making of a computer game", available for free download: [u…
... who know I used to program games I mention R ... say is he needs to talk to some other people. ... aliens would have been tough to make.[/QUOTE]
how about using software sprites ... were good enough coders to overcome the problem, but ... -
128 BASIC-compatible way of loading BASIC as code?On a 48K Speccy (or from 48 BASIC or USR 0 mode on a 128K machine), one can do a silly trick like this: [code];; load a 4000 byte BASIC program ld i…
... ld hl,40 ; BASIC line to resume from
ld ... a,1 ; statement in line
ld (23620),a ... jump to STMT-R-1 to resume at line 40[/code ... today I have learned how to turboload BASIC programs and ... -
iOS7 ReleasedGood news, we can all download Apples newest software today! :) Am trying to download and install for the iPhone & iPad, but Apples servers are rathe…
Its funny to read how Apple has copied Android on ... to Google.
And now some years down the line, to listen to ... people about how Apple copied Android ... very disappointing in appearance and to share even a photo/ ... -
iOS7 ReleasedGood news, we can all download Apples newest software today! :) Am trying to download and install for the iPhone & iPad, but Apples servers are rathe…
... URL] In addition to its ability to make and receive cellular ... white background, allowing it to be registered as an input ... Apple board and headed straight to Google.[/QUOTE]Rubbish
... years down the line, to listen to people about how Apple copied Android ... -
Correction of +2 hardware errorsThis is a collection of various pieces of information picked up from various places, including a lot from this forum. I have edited it and reworded i…
... is a simple way to remove the noise. Insert a (small REED ... insert an additional resistor of 100 ohm in series to the white line ... capacitor of 100pF from this line to ground. In two cases I ... -
Basic sourceAre there any utilities available that will extract Basic source to a text file, or insert it from a text file into any of the common formats lie z80…
... [*]At the prompt "Length? (0 to Resume) " enter the exact byte ... syntax error in a line the program will switch to the BASIC editor ... and display the line with ... error, ENTER, EDIT (to switch back to the upper screen), RUN ... -
Basic sourceAre there any utilities available that will extract Basic source to a text file, or insert it from a text file into any of the common formats lie z80…
... syntax error in a line the program will switch to the BASIC editor ... and display the line with ... error, ENTER, EDIT (to switch back to the upper screen), RUN ... something but stopped with a line of random characters and ...
