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SjASMPlus cross compiler of Z80 assembly languageHi! I want to present you cross-compiler of Z80 assembly language: [B]SjASMPlus[/B]. [SIZE="4"]Features:[/SIZE] [LIST] [*]Z80/R800 documented and un…
... for a Spectrum, but a Z80 system I'm cooking up ... between with some value? My initial memory loader just takes bytes ... -
ZXSpin 0.61 Available nowHi all! Well, after a lengthy few testing cycles, I'm taking the plunge and uploading the latest version of ZXSpin, to replace the rather aged old 0…
... /> And while I consider the Z80 Exerciser to be an interesting ... arithmetic instructions involving the index registers).
[QUOTE=Dunny]until ... -
Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …
... parameters on the stack into registers before executing a CALL ... small C variations on the Z80, 8 or 16-bit return ... />
(Incidentally, using the index registers to access stack parameters is ... the stack and load up registers with parameter values. Also ... -
Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …
... ]
(Incidentally, using the index registers to access stack parameters is ... the stack and load up registers with parameter values.[/QUOTE]
Z80 asm I've been paying ... to do with the index registers seem to generally be desperately ... -
Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …
... to do with the index registers seem to generally be ... try to avoid using index registers. Most people initially think of ... the undocumented treatment that the z80 applies to them, namely you ... leave a lot of spare registers to do anything else, particularly ... -
Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …
... the plague. Instructions using these registers - while useful sometimes - have a ... opinion when using the undocumented z80 opcodes to split them in ... a few more 8 bit registers to work with, although again ... -
Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …
... only (actually, it's tri-state, but you'll only care ... />
If you have a Z80 processor controlling a device with ... the device, then allow the Z80 to fetch it in two ... exception to this with the Z80 when *writing* to a device ... -
Aggravating problem with screensI've rewritten my Sam C runtime emulator code ( well almost ) to allow me to use my own routines for blitting sprites onto the screen, storing tiles …
... present paged in for the z80? [/QUOTE]
Correct.
Z80's 64K window. It's ... />
There are two other registers LMPR and HMPR (Low Memory ... what is paged into the Z80's 64k. -
Aggravating problem with screensI've rewritten my Sam C runtime emulator code ( well almost ) to allow me to use my own routines for blitting sprites onto the screen, storing tiles …
... to the VMPR/HMPR/LMPR registers.... either OUT in assembler, or ... page out the code the Z80's running and crash!) -
Boxes and Boxes of Books!!![URL="http://zxgoldenyears.com/images/books.jpg"]Yaaaay!!! I got books. I got books. I got books.[/URL] Do you got books? Andrew (Sorry... a …
... be difficult to sell your initial print run. A history of ... about the history of the .z80 format etc. -
NEW games for you chaps (and girls too) ;-)Okie, did some .TAP versions of NEW original games that were only released on TRDOS disk format. Some of you might have seen some (one or two are eve…
... should trigger.
The initial loader is as follows:
registers are set as follows:
initial part of the loader (up ... -
I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…
... into ULA_. (because data from Z80 is valid during whole
Z80 probes data bus during T3 (fourth) state. So stopping ... during
T2 state in this case ... from T2 forward, but the z80 only samples at the end ... -
I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…
... ,
Spectrum Ula watch the state of A14 & A15 (without ... be low together, so the Z80 is halted during T2.
The 150 pound home computerWe missing out on this still ... I think. I know the PC market has wrecked all chance for any alternatives to ever have a hope but ... what if. :lol:…
... . In the new mode, individual registers are still 8 bit but ... z80 was sort-of-16-bit because it could pair up registers ... flag behaviour, and many normal z80 instructions have been optimized to ... anymore. But everyone loves the z80 I guess.
[quote ...The 150 pound home computerWe missing out on this still ... I think. I know the PC market has wrecked all chance for any alternatives to ever have a hope but ... what if. :lol:…
... it behaves like a z80 but not identically* and ... the new mode, individual registers are still 8 bit ... z80 was sort-of-16-bit because it could pair up registers ... behaviour, and many normal z80 instructions have been optimized ... times faster than a Z80 at the same MHz ...The 150 pound home computerWe missing out on this still ... I think. I know the PC market has wrecked all chance for any alternatives to ever have a hope but ... what if. :lol:…
... them as regular 8-bit registers -- have been documented and ... to be a "compatible z80" but an improved z80, so there will ... behaviour correct and getting the z80 timing versus raster position correct ... speed between the ez80 and z80 changes with the sequence of ...Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…
... I/O with the Z80 without any supporting glue ... 4x speed of the z80 (1 z80 cycle = 4 Atmega ... you'd have maybe 2 z80 cycles = 8 Atmega cycles ... output pixels every 0.5 z80 cycles = 2 Atmega cycles. ... />
Edit: although a state machine and lookup tables can ...Adding AY music to your plogramI'd like to add some nice tune to my program written in machine code. I am not new to assembler programming but with music programming I have no expe…
... of producing sound while the Z80 does other things, but that ... of the 13 or so registers to set by writing to ...Where to start?Hi all, I wanna start coding something for the speccy. I have good experience at C/C++ and some other languages. I have coded asm on pc too, and ma…
... , from having started on the Z80, when I found out that ... for dealing with so few registers on the 6502 was to ...Where to start?Hi all, I wanna start coding something for the speccy. I have good experience at C/C++ and some other languages. I have coded asm on pc too, and ma…
... having lots and lots of registers to play with :-) In my ... I was particularly good at Z80 asm either - I wrote a ...Question For The Emulator AuthorsWhy do $ED $44, $ED $4C, $ED $54, $ED $5C, $ED $64, $ED $6C, $ED $74, $ED $7C all disassemble to opcode NEG and $ED $45, $ED $55, $ED $5D, $ED $65, …
... know much about how the Z80 (or other CISC processors) "decode ... openeing and closing routes between registers, ALU, address and data buses ...Whats an .SLT file?I found a website with a load of them on. Spectaculator gives no icon in windows explorer for them.
... snapshot formats available (SNA and Z80).
LLT is a ... (do-nothing) on a real z80. The emulator intercepts this and ... next level data according to registers set up, similar to a ...Help required using DivIDE / SE BASICHi, Like others of you, I have pre-ordered a [b]DivIDE Plus[/b] from rwap services but I am trying to get to grips with some of the firmware that ha…
... />
In response to the initial question, ResiDOS doesn't use ... , eg:
%snapload "snapshot.z80"
%rom "GWBasic"
%zx81 ...NMI : especially PitersHello Piters, here the link to your NMI-button. [url]http://members.tripod.com/~piters/nmibutto.htm[/url] I don't understand your reason to place …
... the CPU is doing. The Z80 manual unfortunately doesn't say ... handler has finished executing. The state of IFF1 (the maskable interrupt ... itself) and possibly an unexpected state of IFF1.
You ...NMI : especially PitersHello Piters, here the link to your NMI-button. [url]http://members.tripod.com/~piters/nmibutto.htm[/url] I don't understand your reason to place …
... used to store the previous state of IFF1. So:
NMI
IFF1 is cleared, state is stored in IFF2[/QUOTE ... doesn't vary between different Z80 versions!
SiMy little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…
... of the other general purpose registers can also be helpful.
z80 instruction set so they have ...Need advice choosing one of these optionsA few spanish friends are willing to help me build and program the ethernet interface for the Speccy. Here are the possibilities. Any advice would be…
... also considering using a Z80 at 8MHz to run ... the Speccy a second Z80 processor, but the trouble ... a Z80 to access, although a couple of shift registers could ... the ENC29J60 and a Z80 would enable the use ... allow those experienced with Z80 assembly to make extra ...Just for fun...Loading from unusual audio sourcesHas anyone ever tried messing around with, say, Spectaculator's "Load from audio source" option and seeing what you can do? For instance, I just set…
... storing TZX or Spectrum snapshots (Z80) as a (for want a ... could "save" a TAP or Z80 as a bitmap, possibly as ... />
Maybe a BIN file (z80 snapshot) would be easier than ... 48K block of memory + some registers etc. (totalling approx 383300 bits ...Speccy emulator on a Nintendo DS, with M3 cartridgeAny recommendations for a good Speccy emulator on a Nintendo DS (using a M3 cartridge)?
There is new version ready. This one adds fast loading of TAP and TZX files and save state support via Z80 snapshots. Hope this makes it an appropriate contribution to today's anniversary.
Enjoy.
PatrikSpeccy emulator on a Nintendo DS, with M3 cartridgeAny recommendations for a good Speccy emulator on a Nintendo DS (using a M3 cartridge)?
... TZX files and save state support via Z80 snapshots. Hope this makes ...
