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Return to basic from sna created by Z80 compilerHow can I go back to basic when running sna created using Z80 Assembler ([url] http://www.worldofspectrum.org/utilities.html#crossass [/url])? For e…
... 'L' register must point to a byte containing $38, the calculator literal ... used.
[*]There must be a consistent set of BASIC system ... are other ways of structuring a successful return to BASIC (eg ... . to return a result as a string), which exceed the ... -
Games featuring... relevant bugsThere was a recent improvement to the WoS database in order to classify [URL="http://www.worldofspectrum.org/forums/showthread.php?t=34261"]Games fea…
on chain reaction 128K the only difference a byte compare gave between the fixed music version and the original was 33956,33 and sure enough poking that gave the music in all it's AY-ness. -
SkoolKit 4.4<div><font face="Arial, Verdana"><span style="font-size: 13.3333330154419px; line-height: normal;">Hey, first SkoolKit release announcement since the…
One thing I was always wondering about was how best to portray something like:
LD A,1
...In the control file...where the 1 is a stored byte that gets changed, like a byte in a DEFB statement. -
Multiplying. Again.Is there a faster way of hl=a*32 than doing add hl,hl 6 times?<div><br></div><div>I get the feeling that working with 8 bit registers for most of it …
... 11thowsabout
xor a ;4t clear carry and A
ld ... rld ;18t multiply by 16, A holds
ld l,(hl ... asked because it's multiplying a byte in memory. So if ... start with LD (nn),A that adds 13t, bringing ... .
EDIT 2, XOR A not needed! So that's ... -
Trial version of CharAde graphics engine for Sinclair BASICA trial version of my <span style="font-weight: bold;">CharAde</span> graphics engine for Sinclair BASIC is now available. It consists of a block of …
... that you could draw a level for a game, and just ...
Anyway, I'm being a bit thick here when it ... made up of characters, with a byte per character, but you're ... e.g. 255, to indicate a 'don't print me' character ... within a block. I'd also ... -
ZX-Modules updatesDear readers, depending on a common change on the file list (establishing the meta block feature), I've updated many of my ZX-Modules applications. …
... /> Of course. Just working on a 'find bytes' dialog for the ... . Thanks God I already made a byte sequence editor for ZX-Assembler ... -
Hungarian notation for asm - Yes or No ?There is thing called hungarian notation - https://en.wikipedia.org/wiki/Hungarian_notation Basically it is all about using prefixed indetifier to i…
... something is supposed to be a byte, word or char in ... of making things readable at a glance without having to ... hover the mouse over a variable in a fully fledged IDE ... and wait for a tooltip to tell you.< ... more when operating in a world where you don' ... -
ZX-Assembler version 0.8 (beta) releasedDear readers, yesterday I've published ZX-Assembler in its first version 0.8. It offers you some interesting features, even if I know there are …
... />
What about a DF (or DEFF, or FLOAT ... creates these nice 5-byte floating point numbers you ... putting your code into a byte block and after creation ... be nice to have a ZX-Assembler pseudo opcode ... which produces a ZX-Basic line, with ... -
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…
... can SAVE to a tape image from BASIC ... redirecting printer output to a file? Nah, that ... Printer is just a data stream, or a byte stream. So ... anything that goes to printer, can go to a ... matrix printers, there are a few control characters ( ... -
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…
... emulators can SAVE to a tape image from BASIC ... redirecting printer output to a file? Nah, that ... is just a data stream, or a byte stream. So ... anything that goes to printer, can go to a ... matrix printers, there are a few control characters ( ... -
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…
... /> Printer is just a data stream, or a byte stream. So anything that ... goes to printer, can go to a ... most matrix printers, there are a few control characters (0-31 ... to the printer (draw a dot, advance over a dot, carriage return ... -
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…
... 829332"]Printer is just a data stream, or a byte stream. So anything ... that goes to printer, can go to a ... /> ...
[/quote]
You're a very funny guy. Before you ... hardware communicated with it at a low level.
... -
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…
... 829332"]Printer is just a data stream, or a byte stream. So anything ... that goes to printer, can go to a ... /> ...
[/quote]
You're a very funny guy. Before you ... hardware communicated with it at a low level.
... -
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…
... /> Printer is just a data stream, or a byte stream. So anything that ... goes to printer, can go to a ... most matrix printers, there are a few control characters (0-31 ... to the printer (draw a dot, advance over a dot, carriage return ... -
ZX-Assembler version 0.8 (beta) releasedDear readers, yesterday I've published ZX-Assembler in its first version 0.8. It offers you some interesting features, even if I know there are …
... people want but for me, a byte sequence 33,0,128 (ld ... -
ZX-Assembler version 0.8 (beta) releasedDear readers, yesterday I've published ZX-Assembler in its first version 0.8. It offers you some interesting features, even if I know there are …
... map tool.
Instead of a byte array with 8192 bytes for ... for data, I need a 16384 byte buffer with 65536 double-bits ... containing a value 0..2, where ... those maps to recognize changes), a map is auto-compressed, so ... -
Execution map file support in different emulatorsAs I'm now seeking about execution map files, the different emulators support, I want to start a new discussion here. Today, I tried to create a mem…
... that instructions. Think about ld a,(hl). You should have to ... out whether a byte = 0 means (not ever used), while a byte with bit ... between a not used byte and a real data accessed Byte (and a code byte of ... -
Peeking the contents on screen? How?You will have to forgive me for growing up on the C64, but I know I can peek the location of a character (1024 is top left from memory) and the peek …
... data. ATTR is just fetching a byte from the screen memory. -
Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…
... ]
Any chance of a POP/PUSH code snippet please ... are decreasing the addresses before a byte is copied therefore it will ... -
Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…
... />
Any chance of a POP/PUSH code snippet please ... the fastest possible implementation. A shorter alternative is also possible ... the next step and implement a circular buffer as others ... are decreasing the addresses before a byte is copied therefore it ... -
64k speccydoes anyone have instructions on how to use the extra 16k found in some spectrums?
... being asked, the 48k byte RAM machines use either ... eight bits to make a byte. The type of DRAM ... one bit wide, hence for a byte, you need eight.
... (logic chips) to implement a bank switching arrangement. This ... the past, to create a 80k ZX Spectrum. The ... -
64k speccydoes anyone have instructions on how to use the extra 16k found in some spectrums?
... changes to the machine (basically a "dead cockroach style" IC ... the Spectranet can read a ROM image off the ... or you could modify a DivIDE firmware to be able ... SRAM, and then you could flip a switch so that [i] ... SAM Coupé which is a hard message to get across ... -
r-type in development for the sam coupehttp://cookingcircle.co.uk/ we need z80 coders graphics artists and audio this is the amstrad cpc 6128 version: https://www.youtube.com/watc…
A byte variable screen pointer would be ... with one byte. On a SAM this will give you a two pixel ... screen pointer with 128. On a SAM this will give you ... -
r-type in development for the sam coupehttp://cookingcircle.co.uk/ we need z80 coders graphics artists and audio this is the amstrad cpc 6128 version: https://www.youtube.com/watc…
[quote="Stefan;835677"]A byte variable screen pointer would be ... for this? I find this a bit puzzling, TBH, as Mode ... -
Why were there no SN76489-based sound interfaces for the Speccy?I’ve been wondering for a while now why there were no SN76489-based sound interfaces for the Spectrum. Does anyone here have an explanation? There…
... thousands of transistors and a high clock rate to ... takes 32 cycles to write a byte to this part. To ... the cheapest. It places a 74ls374 buffer between the cpu ... an OUT to write the byte to the 74ls374 and ... the SN to load the byte. With that arrangement you ... -
Why were there no SN76489-based sound interfaces for the Speccy?I’ve been wondering for a while now why there were no SN76489-based sound interfaces for the Spectrum. Does anyone here have an explanation? There…
... of thousands of transistors and a high clock rate to ... using nothing but a 6502, some RAM and a 6522. No ... takes 32 cycles to write a byte to this part. To ... using more gates than a simpler interface to the ... so maybe it had a price advantage in comparison ... -
New Game: The Order of MazesI'm pleased to announce my first full game release since Flynn's Adventure in Bombland 4 years ago. It is called The Order of Mazes and you can downl…
... needs 1024bytes to store a maze. It could store ... the extra bits in a byte for other things like ... marking if you've visited a location. The most expensive ... all previous positions on a stack so you can ... backtrack through them once reaching a dead-end. Worst case ... -
New Game: The Order of MazesI'm pleased to announce my first full game release since Flynn's Adventure in Bombland 4 years ago. It is called The Order of Mazes and you can downl…
... needs 1024bytes to store a maze. It could store ... the extra bits in a byte for other things like ... marking if you've visited a location. The most expensive ... all previous positions on a stack so you can ... backtrack through them once reaching a dead-end. Worst case ... -
The Infeasible GameMy new game will be available early next year. One or two little bits to sort and then I need to play test all the levels. For now, here is a short v…
... does look like I left a byte of data in Level 2 ...

