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Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... was to do with Multiface 3 snapshots being incompatible ... were both related to page 7 being resident for ... already posted the finished Z80 for the Spectrum end, ... br /> Return the full Z80 register map (can be ... version of .SNA and .Z80 snapshots.
Upload the ... -
Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…
... playing them? Would a Multiface help you, not sure ... .
The Multiface 3 is able to snapshot ... seconds on the title page only to have to ... CODE
40 RANDOMIZE USR 16384
[/code]
CYBER1: 16384 6912
CYBER2: 24064 ... -
Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…
...
; --------------------------------------------------------------------------
; Z80 code to restore repeated memory ... just sits on the title page doing nothing. I am ... +SNA_listlen+eax]
sub edi,16384
mov [ ... -
Programming flash eprom on DIVIDE+Can you test it on DIVIDE PLUS ? [url]http://velesoft.speccy.cz/other/flasher-divide-plus.zip[/url] (This flash utility is WINSTON's flasher for dia…
... /> 2 input "set ram page(0-31) for install rom ... ";a$ : load a$ code 32768,16384
4 randomize usr 32000 ... software reset
Next block in TAP is code file ... via OUT 23,64+ram page with your rom. Warning: ... you install BSROM to ram page 24 then you can ... -
New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…
... from start to finish, the Z80 was developed using PDS/2 ... ]
; --------------------------------------------------------------------------
; Compact Z80 to restore +3/2a ROM ...
ld bc,16384 ; Memory page size
ld l,c ... -
Sprites masterclassHi All, You guys are probably tired of explaining sprites but I'd like to clarify a few things if possible. I've sorted the vertical aspect of scro…
... if you can read Z80 then you'll find ... important this is on a page boundary (256 mirrored bytes ... br /> ;
START ld hl,16384
ld de,16385
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... read the descriptions of .Z80 and .SNA files formats, ... i.e. location at address 16384?
2. ... />
3. .Z80 header contains the value of ... /> 5. Compressed block of data in .Z80 files. I read the ... are available in .SNA or .Z80 formats?
...writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... i.e. location at address 16384?[/QUOTE]
This first instruction ... />
[QUOTE]
3. .Z80 header contains the value of ... br /> 5. Compressed block of data in .Z80 files.[/QUOTE]
... t remember the specifics of Z80 compression without looking at ...writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... ultra-short implementation of
.z80 loading routine, my last step ... block):
[CODE]
if(compressed)
{
int i=16384 ... ,block_position=30; // start of RAM and compressed block
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... wrote to is less than 16384, simply discard the new value ... and a 8k block named "fakeROM". When a block is ROM, his ... emulation of interfaces as the Multiface (changes the 16k Spectrum ROM ...Paging memoryI've been thinking about a possibility of paging blocks of memory to and from disk. Imagine dividing usable 32KB of Speccys RAM (why do they call it …
... of those disadvantages, it is 16384 bytes of random accessible, readable ... & writable memory, and the Z80 doesn't have to do ... VGA RAM which I can page in and out"?[/QUOTE]
Z80's address space.
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... jumps to $0038.
A Z80 cold start (see [URL]http ... &highlight=USR+46578&page=3[/URL]) sets SP=$FFFF ... .[/QUOTE]
And specific block patterns are passing the screen ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... />
It's a 2K block of code which comes compiled ... the full Spectrum screen. At 16384, available on side 2, it ... RANDOMIZE USR 16384. You can try it online using the z80 snapshot ...How to create .TAP that loads into high memory banks?I want to create a program that uses the extended 128k memory, the banks that can be switched into the 0xc000-0xffff area. For the simple stuff I've…
... into bank. Each block can be up
to 16384 bytes, and ...
loading screen, and the block size should be so that ... 23388,16: PAUSE 2: REM page bank 0 back, just in ...Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…
... acknoledged interrupt causes the Z80 to do a CALL ... by the user. Any Z80 book can explain this with ... available when an external device (Multiface, DivIDE, etc) offers it. ... , an NMI causes the Z80 to call a routine at ... offer a NMI access page in their own ROM ...Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…
... acknoledged interrupt causes the Z80 to do a CALL ... by the user. Any Z80 book can explain this with ... available when an external device (Multiface, DivIDE, etc) offers it. ... , an NMI causes the Z80 to call a routine at ... offer a NMI access page in their own ROM ...Odd versions of the Multiface One.I've been looking through the adverts for the Multiface One and it's clear that there were a number of versions available. Note the earliest advert …
... ]I've made a little page covering all the known information ... ://www.indigobanquet.adsl24.co.uk/multiface/multiface.htm]Multiface ROM Collection Project[/url ... .htm"]documented[/URL] a working Z80 CRC-32 routineOdd versions of the Multiface One.I've been looking through the adverts for the Multiface One and it's clear that there were a number of versions available. Note the earliest advert …
... /> Maybe you can expand the Multiface page to include Rom disassembly and ... we could scale up the page.
But, I'd ... .htm"]documented[/URL] a working Z80 CRC-32 routine[/QUOTE]
ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…
... for all snapshots
;Z80 snapshot - ram pages is loaded ... ram 5 load to adress 16384 and ram 2 to adress ... 5 load to adress 16384 and ram 2 to adress ... run Z80 128kB snapshots on ZX48 (set surrent ram page from ... load 128kB SNA/Z80 with current ram page 5 or 2 ...Coding for 128kHi all, I wonder if anyone can suggest any useful reading/threads/examples on the fundamentals of 128k coding. Chapter 24 of the +2 manual has prov…
... actually care. The RAM page holding the current screen does ... be addressable by the Z80 for the display to ... first screen is always at 16384, no matter what. Even ... alternate screen you have to page it in at 49152. ... Although you can also page in the first screen ...ZX Spin 0.666 FailsSeems to be broken. Whenever I try to open any file in any way, I get the same error - doubleclick the file, open a file via menu, even "insert a ta…
... "This .z80 file contains a block that decompresses to greater than 16384 bytes ... file...)[/QUOTE]
The .z80 snapshot loader in SPIN v0 ... /> Edit: it may be the .z80 snapshot *save* routine that's ...divIDE +3e: How can I put games into hard disk?I've got a +3, a divIDE and the +3e ROMs. I want to copy some games in the CF card so my +3e could execute them from BASIC ("disabled" divIDE, loadin…
... disk commands or a code block and it gives you the ... 48k game and putting the z80 on the disk.[/QUOTE]
Multiface One).SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... have a second video ram page like the 128[/QUOTE]< ... the normal address range (start=16384 [8000h], length=6144 [1800h]). ... ]could either of the z80's in these interfaces ... as well as the main z80[/QUOTE]
... doesn't have its own Z80 CPU. All logic on ...Newbie Spectrum developer advice ....Hi, Im new to the site and to spectrum developing - well, not quite, I wrote Spectrum programmes in Basic 30 years ago but then went off into the wo…
... in the current directory. Z80 can also print to a ... . Also, if the top page is going to be swapped ... which are in the top page.
More of ... would extend into the top page before the actual BASIC ... k5*kM:
LET k16k=16384: LET k32k=k16k*k2: LET ...Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…
... the tiny block called REUBICA), I page in the suited page, LDIR ... $8000 to $C000, and page back RAM 0.
... your block to $8000, poke your destination RAM page to ... de, 49152
ld bc, 16384
ldir
maximum addressable RAM for a Z80 using bank switching?What is the maximum addressable RAM for a Z80 using bank switching? The Enterprise64 home computer could address up to 4MB, is this the limit for a …
... mdfs.net/Info/Comp/Z80/Circuits/1MbMem.gif]This ... design[/url] splits the Z80's physical address space ... register and increasing the page size would give you ... larger the logical paged block you need. At the ... logical block, but then the code that tries to page ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... I can look up the page.[/QUOTE]
The first ... /> If I remember, X128 provides Multiface emulation of some sort, but ... DISCiPLE emulation. Gerton Lunter's 'Z80' emulator allows a 'map' file ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... to determine whether to immediately page themselves out (although this requires ... all passed straight from the Z80 to the expansion bus.
Multiface had to do special things ...
