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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 ...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 ...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 ...ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... /infoseekid.cgi?id=0027996"]ZX7 page at WoS[/URL] now contains ... , if you have a compressed block at address 51200 and want ... :
[B]dzx7Turbo(51200, 16384)[/B]
That's ...Rodland in colourAs promised (some time ago already ;) ), here is my hack attempt to add some colour to Rodland : [URL=http://www.image-share.com/ipng-1680-98.html][…
... PC register value inspecting the .Z80 file. Next, I defined (in ... starting adress #C360 in RAM page 0.
[url]http://velesoft ... is use compression for main block of 48kB ram.[/QUOTE]
Relocation with SDCCI desperately need auto- relocation with SDCC. Something that will compile all of my code using start address 0 and generate relocation table so that…
... by any of the z80 C compilers and that ... a typo on the deficient page of the wiki: "#define ... on micros without block move (the z80 has ldir so ... be when itself compiled for Z80 target? How difficult would ... C++ runtime environment on a Z80? :D Poor thing wouldn ...ZX Spin kicking up a strange errorDon't know if this is a 'strange' error or not, but it refuses to load certain Z80 files stating: [B][I]This Z80 file contains a block that decompre…
Loading a Z80 snapshot will switch ... temperamental).
Z80 file format version 1.45 ... 2-byte additional header block length, then the ... byte data block length followed by a page# and packed ... jg27paw4/pourri/z80-emulator-dos-utils.zip]Z80 Utilities[/url] ...Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…
... it can deal with the z80 block loads and some of the ... />
right
ld hl,16384
ld c,192
LOOK at the size of my Rom/EmulatorOk, we have 16k, 48k, 128k, even a 256 odd k Rom/Emulator But I want more :p Is there anything out there now or been worked on to give more, as the…
... fact the ULA and the Z80 processor can't access the ... display is in the 2nd page (16384 - 32767), this why programmers try ...A few questions about ZX Spectrum assemblyHi, I have a few questions about ZX Spectrum assembly language programming: - What's the best assembly tool for ZX Spectrum? I tried a bit the ZXSpi…
... ? The examples provided in that page don't explain how to ... ]ORG 30000
LD HL,16384
LD (HL),255
z80 file).
It says something ...A few questions about ZX Spectrum assemblyHi, I have a few questions about ZX Spectrum assembly language programming: - What's the best assembly tool for ZX Spectrum? I tried a bit the ZXSpi…
... ? The examples provided in that page don't explain how to ... ]ORG 30000
LD HL,16384
LD (HL),255
z80 file).
It says something ...Getting aquainted with the IF1bisToday, fifteen days after dispatch, the IF1bis arrived at my door. In perfect order. No customs, no TVA and no handling fee involved. The arrival of …
... is a surprising number of Z80's that can be ... A ;page in IF1
DI
;move block of code ...A "generic" loader for +3(e)I've made this loader for 128k games in +3DOS. [CODE]dos_open equ 262 dos_close equ 265 dos_abandon equ 268 dos_read equ 274 dos_write equ 277 dos_s…
... now pointing to the next block
push hl ; I preserve ... c,a ; Here goes the page to put in $c000
db 0
dw 16384
dw 6912
db ... moved di/ei to my page routine.
- Because IY may ...Fists of Fury (Virgin)[URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0011704"]http://www.worldofspectrum.org/infoseekid.cgi?id=0011704[/URL] I've got this title. …
... /> -->Sub-block 5 - Start=49152, Length=16384, RAM page=16
Reading data...
-->Sub-block ...BASIC games.I remember back in the day, there was a way you could read through the BASIC of certain games, such as Football Manager or Johnny Reb. I can't rememb…
... 25.7 kB) and a block of M/C as well ... tape) and not the Gods.z80
(Full instructions for ... /YourSinclair/Issue69/Pages/YourSinclair6900005.jpg"]Page 5[/url], [url="ftp:// ... /YourSinclair/Issue69/Pages/YourSinclair6900010.jpg"]Page 10[/url])
One ...Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…
... first one was a random block effort done in BASIC 30 ... .htm]Spot's Pourri[/url] page[/i] ), which I've called ...
43 LOAD "disp"CODE 16384,6144
44 RANDOMIZE USR ...Is ESXDOS flexible enough to incorporate e.g. Spectranet commands?I was just discussing the idea with someone about the wish some people have to be able to combine interfaces such as DivIDE (Plus) / DivMMC EnJOY! wi…
... mostly useable on a general z80 machine rather than just a ... code so that you just page the spectranet in and shortcut ... set up its registers, page in a block of ram and read ... and the buffer reads a block from a device so the ...Is ESXDOS flexible enough to incorporate e.g. Spectranet commands?I was just discussing the idea with someone about the wish some people have to be able to combine interfaces such as DivIDE (Plus) / DivMMC EnJOY! wi…
... spectrum community and into the z80 community, if he is conducive ... writing general code for the Z80 + W5100 most of the routines ... for the Spectrum but a Z80 based single board computer I ... physical memory addresses since my Z80 SBC had all of its ...A "generic" loader for +3(e)I've made this loader for 128k games in +3DOS. [CODE]dos_open equ 262 dos_close equ 265 dos_abandon equ 268 dos_read equ 274 dos_write equ 277 dos_s…
... FREDDY.BIN:
; screen$ (common) 16384,6912
; part 1 24800 ... /> call dd_l_off_motor
; page BASIC ROM
ld a ... br /> ; WARNING: the next data block to read IS NOT the ...
; paging routine
; a=page
paginar:
di
