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Knight Lore disassemblyHi, Not quite sure if this belongs here or in "Games" but figured it's more likely that developers would be interested. I've just released the …
... br />
By the way, in this subroutine:
[ ... br /> RAM:B5F9 DB FE in a, (0xFE) ; read status ... reason for the 'out' instruction since it's not required ... put onto address bus in the 'in' instruction). Moreover it messes up ... -
Knight Lore disassemblyHi, Not quite sure if this belongs here or in "Games" but figured it's more likely that developers would be interested. I've just released the …
... no reason for the 'out' instruction since it's not required ... are put onto address bus in the 'in' instruction). Moreover it messes up ... similar to this is found in a number of Ultimate's ... port HSB to #FD first in order to read it, stemming ... -
Upload pagesHi I found a game today in my collection that isn't on WOS, and wanted to notify WOS of it, but the page to give game information doesn't work. I …
Oh, BTW, I've send all inlay scans and typed in Instruction to Blam, Santa and Bazam to Gilby, as he contacted me about it. I suppose no need to send them to Mort aswell? -
Reading Spectrum+ keyboard versus rubber keyI've started trying to learn Spectrum machine code after a 30 year break. I've encountered something that's puzzling me and I'm hoping that someone c…
... an AND 0x1F after the IN instruction, or alternatively you can use ... bits that correspond to keys in the returned value.
Understanding tape edgesI've never done any tape reading code. But I've read about these "edges" on multiple occasions. Trouble is I don't understand what they heck they are…
... about the physical/electronic aspects, in which case, you might want ... the ULA has a similar (in concept) circuitry inside.
IN instruction. That’s pretty much it ...Strange Fault on 128 +2 GreyHi I've got 2 128 +2 Grey Spectrums and I thought they were both in good working order but it seems not but I have no idea what is wrong with one …
... ULA from my good spectrum in order to test by swapping ... safe to swap ULAs around in the 128k machines.
IN instruction to either read the keyboard ...How are LAST-K and FLAGS set on a Real Spectrum?Hi, I'm writing a Spectrum emulator and I've got Horace and the Spiders working (with the wrong colours and no sound) but when I boot into ROM non…
... need to have coded your IN instruction correctly as the ROM uses ... IN to reset the bits.
< ...ProTracker manual/instruction in English?Hello. A friend of mine would like to start making AY music on ZX Spectrum. In this purpose he'd like to have a ProTracker's instruction/guide/manu…
Hello.
A friend of mine would like to start making AY music on ZX Spectrum.
In this purpose he'd like to have a ProTracker's instruction/guide/manual.
In English language.
Is there anything like it, on the Net?CODE instruction in array$ PRINTSo I'm still plugging away at BASIC and have found a line of code (another!) that's really puzzling me. The line is as follows: PRINT A$(P+Q TO P…
...
The A$ values (in memory, decimal) are:
478 ... 481 plus the length in 478 (which is 8 ... , there's a CODE instruction in there and I don't ... misundertanding how the CODE instruction works or I've ... the values are stored in memory. Can someone please ...OCEAN IN COPYRIGHT THEFT SHOCKER![url="http://www.redkeyreddoor.com/index.php?p=46"]http://www.redkeyreddoor.com/index.php?p=46[/url] The guy who did the coverart for some of the Oc…
... book panels used in the "Where time stood still" instruction booklet straight ...There's a bug in my Speccy, Dear Liza, Dear Liza...Hi guys, Just me being annoying again - Can anyone out there in 'Internetland' help me with ideas about what could be causing a bug in my Speccy em…
... might have been in the LDDR assembly language instruction, as the ... example, I'm writing in C++ and in that language "if ( ... try and spot where their instruction pathways differ! Sadly though, ... ' next ;) )
Thanks in advance
Speccy
Game flyers and instruction sheetsI'm in the middle of a massive scanning drive, the end result of which is loads of flyer sheets and instruction sheets for various games. Some of th…
I'm in the middle of a massive ... loads of flyer sheets and instruction sheets for various games.
LERM Transpack 2 Instruction ManualSorry I hope I have posted this on the right forum. Can anybody help I have an original LERM Transpack Tape but I have lost the Instruction Manual o…
... but I have lost the Instruction Manual over the years, can ... the systems that I had in the late 80s.Bizarre stuff in Interface 1's shadow ROMAccording to the Complete Shadow ROM disassembly, the function that exits back to the BASIC interpreter after interpreting IF1 commands is this: [co…
... BREAK is pressed
05D1 IN A,(+FE) during runtime.
05D8 IN A,(+FE)
05DA RRA ... going to get overwritten by IN A, (0xFE) - why are ... is not a valid Z80 instruction. You can only BIT a ... and say what's REALLY in the RST 18 routine? The ...Breakpoints in debuggers in emulatorsA breakpoint, according to Wikipedia ( [url]http://en.wikipedia.org/wiki/Breakpoint[/url] ), is an intentional stopping or pausing place in a program…
... or pausing place in a program, put in place for debugging ... breakpoint at a given location in memory and your Spectrum ... and goes into debugging when instruction in this location is executed. It ... it possible to set watchpoints in any Spectrum emulators? And ...Break points in SpectaculatorHello!!! How do I make the break points to work? I found a POKE for "The Muncher 128K" (using my ZX Life Shield WIP utility) but it is only the cou…
... it to see when an instruction would change the counter.
in the debugger but it never tells me that an instruction ...Letter errors in Spanish instructionsSometimes when I want to play Spanish game, I try to read an instruction first. As I don't speak Spanish I try to use Google Translate with Spanish t…
... , I try to read an instruction first. As I don't ... instructions have some bad letters in the text.
E ...Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... assembly language instruction for 'return to calling program' (in our case ... in blue. This is Spin's colour code for an instruction ... in Appendix A of the Spectrum Manual.
Some instruction ... br /> Some instruction bytes need a further instruction byte to ...unusable KEMPSTON JOYSTICK in gamesSome ZX games use bad routine for read kempston joystick port. For example game BLOOD VALLEY read kempston joy from port #DF ( BIN 11011111 ). This s…
... games ?
- detect in ZX emulator instructions for reading ... show debugger on each instruction for reading joystick port< ... value #1F. In this routine can be erased instruction IN A,(DF)... ... A",ENTER and rewrite instruction IN A,(DF) to IN A,(1F)
LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…
... program will have the LDIR instruction in non-contended memory, and ... (HL) and destination (DE) addresses in contended memory.
... the duration of a LDIR instruction (normally 21T) means that ... scroll the full screen in situ (either in 48K, or double ...Shadow ROM partial decoding not implemented in emulatorsOr at least, not implemented in Spectaculator, and it seems that not in Fuse too. [URL="http://www.speccy.org/foro/viewtopic.php?f=8&t=408&start=53"…
Or at least, not implemented in Spectaculator, and it seems ... 0700h in the shadow ROM. This location contains a simple RET instruction ... shadow ROM. As the RET instruction ends its execution, the ROM ... .jpg[/img]
In fact, this shows that the ...QL in bits from car boot saleI was at the car boot sale today, and I bought the following for ?40: * Spectrum+ * Tape recorder * An external Microdrive (no Interface 1 unfortuna…
... a bottom case (physically hacksawed in half)
* Another half ... a keyboard, physically hacksawed in half
* Two internal ... works... would just plugging it in to a telly and seeing ... />
It also comes with instruction manuals on how to add ...The short blocks loaded in Jet Pac(Hope this have not been previously discussed. If so, my apologies) Is there any reason why Jet Pac loads three short blocks after the main block? I…
... assembling the NMI code in ROM and in fact, they patched it ... put a single M/C instruction. In fact, the value poked here ... opcode of the JP (HL) instruction, which is called from the ...Is there a DD40 instruction?On this page: [URL="http://mdfs.net/Software/Z80/Exerciser/Spectrum/zexall.src"]Z80 instruction set exerciser for Spectrum[/URL] I noticed the belo…
... /Exerciser/Spectrum/zexall.src"]Z80 instruction set exerciser for Spectrum[/URL ... 'ld ,.......'[/CODE]
but in the The Undocumented Z80 Documented ... it a bug in ZeXall or is the instruction missed from Sean ...Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... bc, 0 ;get D bits in BC
exo_gettingbits:
... and inserting a "dec ixl" instruction before "djnz exo_initbits" one.
in the code)
... bc, 0 ;get D bits in BC
exo_gettingbits:
Timing in loading routinesJust for curiosity I have done some experiments with SAVE command in accurate emulators, and then analyzing the generated WAV and I have obtained lit…
... some experiments with SAVE command in accurate emulators, and then ... two instruction with contention, OUT (FE),A that affects only in ... pilot tone, and the same instruction plus LD ... SAVE routine. The OUT instruction is 16x times more frequent ...Machine code/Assembly language back in the dayHello. Back in the 80s when I was a kid, I didn't learn Z-80 machine code, but I was always curious about it. Just recently I decided to explore Z-…
... who were learning coding back in the 80s though.
... Spectrum crashes. A single missing instruction and the Speccy goes into ... code, which is still waiting in the assembler window. However, writing ... would probably have given up in despair.
So ...quoting ";" in ZXSpin assemblerIs there any trick to getting semi-colons in strings in the ZXSpin assembler? If I try to do this I get a "garbage following instruction" error, as t…
... trick to getting semi-colons in strings in the ZXSpin assembler? If ... I get a "garbage following instruction" error, as the semi-colon ... marker even when it's in a defm string. To get ... up the string and put in a "$3b" whenever a semi ...Which peripheral listened on port $9f from back in 1984 (Chuckie Egg related)Hi Apologies if this is in the wrong section, please feel free to move it to the correct one if so. I've been looking through the Chuckie Egg c…
...
Apologies if this is in the wrong section, please feel ... an OUT ($9F),A instruction in the middle of the interrupt ... .
The OUT instruction itself is at $9ce0. Pretty ... The MIDI specification was published in August 1983, according to the ...
