-
Interface rom - Need help to dump itHi, I have temporarily an interface that is similar to a multiface. It has an NMI button and displays a menu where states can be saved and pokes ent…
... normally do is clear enough memory (CLEAR 32767 should do) and ... a different address (such as 32768[I][/I]). Then you can ... a form that can be read more easily. I just hope ... -
Interface rom - Need help to dump itHi, I have temporarily an interface that is similar to a multiface. It has an NMI button and displays a menu where states can be saved and pokes ent…
... normally do is clear enough memory (CLEAR 32767 should do) and ... a different address (such as 32768[I][/I]). Then you can ... a form that can be read more easily. I just hope ... -
Rom dumping a Mirage MicrodriverI need to dump the rom of my Mirage Microdriver for Zub and don't know what to do...any help?
... of just contains some extra memory to do its stuff ... be paged into the lower 16K at any one time (copy ... return pages the Microdriver's memory back in and restores the ... you try to read from a non-existent memory chip, you'll ... stack overwrites the screen memory). -
Rom dumping a Mirage MicrodriverI need to dump the rom of my Mirage Microdriver for Zub and don't know what to do...any help?
... [*]Writing to memory
[*]Reading from memory
[*]Execution from memory[/LIST]
16K at any one time ( ... you try to read from a non-existent memory chip, you' ... the stack overwrites the screen memory).[/QUOTE]
Yeah ... -
Starting on machine code - BASIC first?Howdy. If I wanted to start learning machine code for the speccy, from scratch, would you recommend I learn BASIC first or is it entirely possible to…
... just use ordinary decimal for memory addresses? Of your two examples ... find hex is easier to read in listings when your numbers ... what memory page it is located in (on a Spectrum, which 16k ... is very very hard to read) if you're going to ... -
How could you hear if loading BASIC or MC?When loading a Spectrum program from tape you could usually hear from the sound if it is a BASIC or is some machine code program *. My question is, w…
... memory. For an example, try
[code]SAVE "j" CODE 32768,2048 ... [/code] on a freshly booted (non-16K) machine for ... -
The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
... MSB, W5100 LSB, W5100 data read/write). The address MSB/LSB ... like the paging register being read/write rather than write only ... trapping addresses in the lower 16K while ethernet code is being ... 'm planning to use flash memory for the ROM with 4K ... -
CSSCGC 2008 has now officially begunFor coming last in the 2007 crap game compo, I have the honour and privilege of hosting CSSCGC 2008! I have now put up the CSSCGC 2008 website at …
... , but not too lazy to read things directly in front of ... for how the ZX81 graphics memory works? I feel a port ... write for the 16K ZX81.
Less memory than 4K implies ... with a size of 32x24. Read the sysvar D-FILE to ... -
help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... />
Also, RAM in the 16k-32k area is contended which ... programs are assembled beginning at 32768, at least until you run ... row. Popping moves up in memory so a single sequence of ... ) because pushing moves down in memory. So we push in the ... -
help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... first address you want to read from with a pop.< ... first address you want to read from and the sp address ... the z80 gets access to memory and i/o ports when ... accessed above 32k and below 16k on a 48k spectrum. ... The 16k-32k area however is shared ... -
Emulators on the ZX SpectrumHaving released a Spectrum 16K emulator for Spectrum 48/128 machines as part of CCG2008, I was wondering if anybody knows of any emulators which actu…
... /> If this fits in a 16K Rom Paul Farrow is interested ... /writing memory the device shortcuts A15 to high making the read from ... -
MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…
... example of write
;memory block to port
;------------------------------< ... />
;source adress (memory)
SOURCE equ 32768
;target ... DMA sequence
;3T read + 3T write
... -
MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…
;DMA transfer example of read
;memory block from port
;------------------------------
;target adress (memory)
TARGET equ 32768
;length ...
;PORT B=incremented memory
WR2 defb %00010000
128K Guru requiredThe answer eludeth me, and I seeketh a higher knowledge! I'm in the process of putting together a very simplistic emulation testbench of my laptop s…
... ROM still.
The memory test sets all locations to ... black paper.
The memory test on the 128K machines ... the rest of the 16K chunk to zero with ... For each of the eight 16K chunks, the test uses a ... .
You can read a disassembly here
128K Guru requiredThe answer eludeth me, and I seeketh a higher knowledge! I'm in the process of putting together a very simplistic emulation testbench of my laptop s…
... ROM still.
The memory test sets all locations to ... black paper.
The memory test on the 128K machines ... the rest of the 16K chunk to zero with ... For each of the eight 16K chunks, the test uses a ... .
You can read a disassembly here
A 64K Spectrum?? Is this real?I have seen avertised on Ebay today two boxed ZX Spetrum Rubber Keys. One 16K and the other a 64K upgraded model?? Is this for real??? [url]http://…
... 64k RAM? (With the first 16k as the fixed ROM of ... [i]memory[/i], of which 48K is RAM and 16K is ROM ... still Randomly Accessible despite being Read Only.)
I don ...ZX Spectrum (16K) sound/beepHi all, I think I'm in right place now, I've tried to find an answer how to generate two channel sound using ZX Spectrum 16K. Only think I've found …
... 29000 it can run on 16K Spectrum. It will sound ... Sinclair.
;
org 32768
DI ; Disable interrupts.
read a new envelope.
... br /> IN A,(254) ; Read keyboard.
CPL ; Complement result ...A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…
... corrupting a huge area of memory above the code with the ... code:-
[code]
ORG 32768
NUMSTARS EQU 300 ...
LD A,(HL) ; read star byte into a
Do you really want to play a new cool, interesting, but rather hard game?Just thinking about it... For example, someone will create a game. BIG game. BIG BIG game, with multiple loading scheme, numerous rewind blablabla (o…
... avoid contended memory - that leaves you with the 32K above 32768 to ... use during the game loop. Of that memory you ... can only page memory into the final 16K of that memory (based at ... interrupt/music routines in contended memory then they will be ...Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... if the machine is 16K or 48K and then ... memory with 0xFF and 0x00 in an alternating pattern, and then read ... to fill memory from a known seed, then read RAM back ... br /> To do an effective memory test you really need to ... two passes, the lower 16K for the 4116 RAM, ...z88dk Help neededI'm starting my tests with z88dk from a very simple example from a tutorial in speccy.org. It works fine but when I make the smallest modification t…
... statement sets the malloc memory space to empty. The ... sbrk() call adds memory from 40000 to 49999 ... compiled at 32768, which leaves you 40000 - 32768 = 7232 ... to determine how much dynamic memory is actually needed.
read in order and are ...Who Are You Guys..... ???I'm curious to learn about the guys (and no doubt gals) who keep this forum alive. Were you all Spectrum-heads from the start? Did any of you come la…
... />
Got my first Spectrum (16K issue 2) around Christmas 1982 ... , memory paging unit, etc. Again, nothing fancy ? I tended to read more ...Simple text compressionI just checked one idea about text compression. Do not take it as recomendation but rather as info which can you save some time when you are solving …
... br /> ;
.org 32768
.MODULE MainApplication
; This function sets the read cursor to a given string ... br /> ; Save Cursor back to memory
LD (CursorPos), HL< ...Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …
Because the POP operations read from uncontended memory. It's only the PUSH ... that go into the lower 16K of RAM, so:
[CODE ...z80 format: ED ED xx yyI've just been studying the documentation for the z80 file format: [url]http://www.worldofspectrum.org/faq/reference/z80format.htm[/url] I have a d…
... (c) for c in f.read()]
f.close()
... br /> sys.stderr.write("ERROR: Memory size is %i\n" % ... 4))
_write_data(f, ram[32768:49152])
_write_data(f, (255 ... zxlib
header, memory = zxlib.get_snapshot('some.z80')
Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…
... when you want to read/write large memory areas to a file ... didn't attempt to read/write across any 16K boundary, and also ... to be in the top 16K range.
If you ...Spectrum Diagnostics Board - 25th Anniversary projectWell, I said I'd try and get something online about this by today, and I have indeed done so. This web page still needs finishing off (in particular,…
... 128K memory tester. You need to load them at address 32768. Once ... and several ROMs) at address 32768. And how much space is ... know how to do that), 16K or even 48K. I think ... the diag board are always 16K, so that might answer my ...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…
... address spaces -- one where memory lies and one where peripherals ... "LD A,(HL)" -- read 8 bits from the memory address held in ... a memory mapped display device. THe ULA actually owns the 16k ... This means peripherals are always memory-mapped, the downside of ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... run 50% faster and the 16k DRAMs holding display data would ... addresses. Ie- two bytes are read using three address strobes rather ... introduce inconvenient holes in the memory map. At that time RAM ... been done is split the 16k video ram into two 8k ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... run 50% faster and the 16k DRAMs holding display data would ... addresses. Ie- two bytes are read using three address strobes rather ... introduce inconvenient holes in the memory map. At that time RAM ... been done is split the 16k video ram into two 8k ...
