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Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …
... ;555891]This aint a TRICK, is it? This is NEW SOFTWARE ...[/QUOTE ... a few months back. For example:
* Using VAL "number ... A replacement for INPUT feels like a "trick" to me as it is a ... subroutine and not a ... -
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... CHOOSE ANOTHER
; STREAM NUMBER]
; ... 0x15c4 ; address of the INPUT # routine
defb ... ; The column value is a 6 bits value ( ... -
Inlay Project DiscussionAll, It's time this project was actually started in anger. The aim of this thread is to find out what every wants from it and the standards that sh…
... maintainer search, I can provide a number of inlays should you need ... /> I think the current concensus is 600dpi for preservation, with other ... the main stumbling block now is the actual gubbins that ... e. how do we vet/validate submissions? Do we have ftp ... -
probably a stupid question about RST16I'm using the 'hello world' code borrowed from [url=http://equant-retrochallenge.blogspot.com/2008/07/zx-spectrum-assembly-programming-under.html]her…
...
If xx or yy is 0 and you use 0 ... routine might then use input of a subsequent call as xx ... you use to terminate strings, is not allowed to be [ ... zero in an AT is to use a number which sets the position ... to zero but isn't a ... -
which zx-spectrum games uses 1bit sound samples?hi! I'm looking for zx-spectrum games using 1bit sound samples. Compairing with msx, which has far less games available than zx-spectrum, there are f…
... -bit using a standard ZX Spectrum through its Mic input, it would ... be very easy to knock up a short ... .
All that is needed is a loop which reads two bits ... twice as much space is needed for a given number of samples, I ... -
My second game: RetroinvadersHello, here is my second game. Graphics from adastan and music from Gasman and Gibbs. KgMcneil has got helped to developed it and has tested it. …
... thing I could complain about is not so good English ... ]
I'm a perfectionist at heart, but probably ... This necessitated working and reworking a number of lines. We freely dispensed ... for your input (all of you),
It is much appreciated ... -
z88dk stdio fopenI'm trying to write a fcntl library, based on the p3.lib one. Looking at fopen(), it calls freopen_z88() which turns the mode string into mode and f…
... the FILE* level where input is blocked on lines and ... a number of bytes controlled by the driver; the actual number is variable and is ... br /> 195, DRIVER ; this is a 'jp DRIVER' instruction
... [/code]
This is a rough idea.
Errors ... -
Alkatraz protection systemI recently became interested in the Alkatraz protection system, a very widely used tape protection (a infoseek search returns more than one hundred r…
... appear to get the right number of .bin files still ... br /> An empty bin file is generated if (at some point ...
The pilot length is the real number of waves, so it ... test, as the WAV input is not a real tape.
< ... but I think this is probably a bit over my ... -
Light gun compatibility with C64 and SMS.Hello all, I'm looking at light gun stuff on my old systems and wondered about how compatible the guns were across systems. I have the magnum Sincl…
... light sensitive diode in a gun casing, tiny bit ... a number of methods to gauge what the light gun is ... a white area for one frame and reading the input ... later systems) work in a more complex way. Whenever ... of two methods, either a simple calibrated joystick (in ... -
z88dk sticky?I've just tried to PM Alcoholics Anonymous and couldn't because "Alcoholics Anonymous has exceeded their stored private messages quota and cannot acc…
... startup there are a fixed number that can be ... s requirement of minimum number of simultaneously open files. ... for input, including left, right, up (up a line number of ... input driver's input queue. Pull corresponds to polled keypresses. Each keyboard is a ... -
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…
... 25ns between a high to low transition at the input and the ... 32kx8 SRAM ICs. The former is a high speed part that I ... /> I have tested with quite a number of Spectrums and believe this ... the transistor circuit above. This is a surface mount device that can ... -
Decimals!Quick couple of (probably very silly) questions, folks... If I have an input command in a program asking "How many potatoes do you want to buy from …
... If I have an input command in a program asking "How ... this week, Grubsy?", is there any way I ... the floating point number.
To round a number you need ... on ANY nearest n-dividable number:
First ... divide the number by n, then round and ... -
AY-3-8912 emulationI am trying to improve the emulation of the AY-3-8912 in FBZX wii. I studied the code of some emulators and read some documents. I would like to be…
... Number Generator of the 8910 is a 17-bit shift */
/* register. The input ... to the shift register is ...
/* The following is a fast way to compute bit17 ... -
ISO-Copy - Individual Software revisitedHi folks In another thread about Supertape: [url]http://www.worldofspectrum.org/forums/showthread.php?t=36203[/url] ... we touched on ISO-Copy by th…
... . Please note that 233 is an odd number, and we *know* pulses ... work over the input file, converts it to a square wave file ... , for the sake. As a consequence, it is a frequent issue CSW adding ... , in status bar: 14 is the number of samples this selection takes ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... set
; validate radix
call ... *s
; is number negative?
bit 7 ... /> alpha:
add a,'A'-10
ret
[/code ... items from the stack. Here is a (contrived) example:
... -
Work out attribute location in MCHow do I go about writing a MC routine which calculates the attribute address from a set of PRINT co-ordinates. I know you in basic you multiply the…
Lookup table way is fast, but requires a number of changes to be ... effective. Here is an example - now input ... for larger table - first half is at 256-bytes boundary, next ... half is also aligned to the next ... -
Sending key presses to the spectrumfor a project I want to send automated keyboard presses to the ZX via a micro-controller. Is it possible to send these through the expansion slot? …
... bit output will be the input to your microcontroller (normal digital ... input, no need for pullups). ... input is the row number (0 to 7).
Better yet, use a ... that decodes IORQ+A0+RD (a 74LS32 is enough for this) to ... -
40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... /> ld bc, report_j ; address of input routine (REPORT J)
ld ... b ; high byte of the input routine
inc hl ; ... offset data
; the total number of bytes occupied,
; held ... 13 ; If the current character is a return
jr nz, ... -
RECOM pin compatible DC-DC 7805 regulator replacementsFinally got myself sorted out now. If you want to purchase chips send me an email to [email]alistair@alistairsserver.no-ip.org[/email] with your payp…
... pictures, there are a number of variations in the ... /> Some appear to have a input protection diode (to prevent ... accidentally connected with an incorrect input polarity).
input is quoted as 40V), ... 35V (so max input is 35V if you dare ... -
Random number from a rangeHow can I generate in assembly a random number from a range, let's say 0-21 or 0-57? There are generators which make it 0-255. By using bit masks I…
... ) way. This example is for 0-21:
[code] ;input: a = your initial ... /> Brill. This is a new technique for me (a = 31 - a using xor 31 ... a random number in the specified range, the weighting (probability) of each number is ... -
Random number from a rangeHow can I generate in assembly a random number from a range, let's say 0-21 or 0-57? There are generators which make it 0-255. By using bit masks I…
... Brill. This is a new technique for me (a = 31 - a using xor ... a random number in the specified range, the weighting (probability) of each number is ... I see it, it is literally a 'range limiter' that doesn ... a sense, so, either way the full range of input values is ... -
WibbleBibble's Basic threadHi in an attempt to keep my questions from spamming the forum. I think its better to put them all in one place. Thanks everyone so far, I feel I am …
... org/wikipedia/commons/thumb/a/a7/Snakes_and_Ladders.jpg/638px ... below is for the orignal game. its not a fully ... the moment (a player would only be a input statement to ... I found had a blanced number of snakes and ... get it to work there is a bug.
... -
WibbleBibble's Basic threadHi in an attempt to keep my questions from spamming the forum. I think its better to put them all in one place. Thanks everyone so far, I feel I am …
... is the small issue of someone playing the game past the number ... future. There implementable (is that a word?) There would ... the atari is just amazing. It realy is a fantastic computer. ... screen printing mechanics (done)
input controls (part done)
... -
EmuzWinHi folks I'm using EmuZWin and it's started running games super quick (not all games but some) I've tried messing around with speed settings but eve…
... for that)...
EmuZWin is a good choice for running anything ... t happen over night... EmuZWin is a product of its time... ... of EmuZWin and remember sending a number of emails to request various ... t written in a vacuum - he had user input, and gave ... -
Revisiting Spectrum CPU clock regenerationWarning: This post will be a bit nerdy :-) Some time ago, I experimented with phase locked loop circuits as a possible way to regenerate the Spectru…
... real hardware - so simulation is a great timesaver!) it was ... can take as an input (19MHz), so D ... chip on the breadboard is a Schmitt trigger inverter. What ... A more complete test will be to count the number ... of cycles since the interrupt, and see if this is ... -
ZX Spectrum + 2 128K - Video Issue?Hi All, I have just picked up a secondhand +2 and am having a problem with it. :( When I power the unit on and hook it up to my TV with the RF cable…
... for a number of reasons.
It is possible that there is a ... can find any "external input" settings in the TV ... menus. Set to RGB input mode.
if you ... the RAM chips. This is a common problem and can ... are fixable. Less likely, is a faulty ULA (if the ULA ... -
ZX Spectrum + 2 128K - Video Issue?Hi All, I have just picked up a secondhand +2 and am having a problem with it. :( When I power the unit on and hook it up to my TV with the RF cable…
... a number of reasons.
It is possible that there is a ... can find any "external input" settings in the TV ... menus. Set to RGB input mode.
if you ... /> The SCART input on both TVs is working fine with ... Although I know there is a lot of satisfaction when ... -
Altera CPLD vs Xylinx FPGAI will dig into the world of FPGA's, mainly to find something that can replace one or more GALs for my current and new projects. And it's never bad t…
... slices, each slice having a small number of CLBs. FPGAs usually ... if memory serves) has a 4 input lookup table in each ... 6 has a 6 input lookup table - so a Spartan 6 ... logic in a microcontroller. A microcontroller is essentially a small system-on-a-chip. ... -
9V switching cheap chinese suppliesI used some 9V supplies from China (eBay) to get some ZX Spectrums working. One of the solutions I used these small 1.5A switching supplies for, was…
... ve tested and dismantled quite a few very cheap supplies. ... dangerously inadequate separation between the input and output.
... transformer. I've seen a number that use basic enamelled wire ... such situations, but it is prescribed in detail and I ...
