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RAM paging and port usageDear users and developers, I'm just trying to find some detail information about RAM paging on the Spectrum 128 and later models, especially those a…
... found:
Spectrum 128k and +2:
port 7ffd ... TS2068
No RAM paging, but always fixed 48k RAM starting at address ... br />
Pentagon 128k:
same as Spectrum 128k and +2
paging methods of the Spectrum 128k, bits 6 ... -
RAM PagingCan anyone shed some light as to how RAM paging actually works, at a hardware level (so not POKE xxxxx stuff). I know about CE and OE lines on DRAMs …
... some light as to how RAM paging actually works, at a hardware ... is employed to trigger the paging? -
128k RAM paging from BASICI'd always thought that OUT had to be used to page RAM, which from BASIC would be an "OUT 32765,ddd" command, although I don't know if just doing tha…
... to be used to page RAM, which from BASIC would be ... -
File size in 128K RAM diskHi Folks, Is there a way to get the size of a file stored in the 128K RAM disk from within a BASIC program? Many thanks Paddy
Hi Folks,
Is there a way to get the size of a file stored in the 128K RAM disk from within a BASIC program?
Many thanks
Paddy -
More RZX fun and gamesHi guys, as you may or may not be aware, xmikex and myself have been submitting recordings to Daren's archive for quite some time now. We still have …
... guess that it's the 128k RAM paging at fault there - we currently ... saving a snap of the 128k in the Editor is pretty ... reload back to the wrong RAM pages, and therefore the keyboard ... -
Questions from the new owner of a grey Spectrum +2I managed to pick up a grey Spectrum +2 off of ebay with cheap shipping (I'm in the US... it was $13 total and it has a Donkey Kong tape inside) and …
... IDE interface and extra onboard RAM, which can run the ZXVGS ... (1ffd) is aliased to the 128K RAM paging port (7ffd) so some modification ... -
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 …
... when returning to 128K BASIC because 128K BASIC swaps RAM pages and on ... .
Not checked the 128K RAM paging though to see if this ... -
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 …
... when returning to 128K BASIC because 128K BASIC swaps RAM pages and on ... .
Not checked the 128K RAM paging though to see if this ... -
Possible dodgy +2 - resets when loadingSo I have a grey model +2 with a recently refurbed tape deck (new belts and cleaned heads). It might be a product of bad loading, but from what I ca…
... freescape games and some 128k versions / 128k only games. Specifically it ... but on a 128k model actually pages RAM blocks in and ... :)
48K mode disables 128K RAM paging until a reset, hence why ... second quick look for a 128K memory test program and ... -
West Bank only running with Kempston Joystick on ZX SpinI can get West Bank [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0005664"]worldofspectrum.org/infoseekid.cgi?id=0005664[/url] only to run w…
... OUT 32765,48 to disable 128k RAM paging because the game reset the ... -
If you had four roms...Just wondering if you were designing a Spectrum from scratch, and you used a 27512 EPROM, which would hold about 4 spectrum roms, what you would inst…
... hardware with banked ROMs and 128k RAM paging (minus bank 5 and the ... and stuck to the 48kB RAM then you have the problem ... that +3DOS needs RAM for workspace, which eats into ... your limited RAM even further. The hardware for ... -
Tough paging questionOK... Take this: 1. We have a program compiled and run from within GENS under a Pentagon 128K environment. 2. The program works perfectly. 3. We sav…
... within GENS under a Pentagon 128K environment.
2. The ... glitches, especially in matters of paging.
6. The generated ... /> I thought the paging system for the RAM on the +3 ... anything different in matters of RAM paging.
And, Cyborg, ... -
128K RAM tester as .TAP?I was sure that I've seen a RAM tester that can be loaded with e.g. DivIDE or DivMMC EnJOY! as .TAP. But I can't find it (been searching through the …
... that I've seen a RAM tester that can be loaded ... be used on 128K machines, and if lower RAM works fine, and ... a small error in upper RAM.
I have a ... -
Interface 1bis RAM Drive modificationAll Interface 1bis users I hope I am not interfering with Dan, but I saw on his site that he has a RAM Drive upgrade/modification for the Interface …
... site that he has a RAM Drive upgrade/modification for the ... . To have an on-board 128K RAM drive, the user must install ... -
Spectrum +2 (grey) RAM issueHi, I?ve got a ZX Spectrum +2 (grey) with what I think is a RAM issue. I used to be able to load games very reliably by playing converted TAPs and …
... what I think is a RAM issue.
I used ... with that device is a 128K RAM test firmware.
When ... [/url], page 4) means that RAM page 5 has an issue ... the PCB is for which RAM page?
I?m ... -
EmuZwin 128k banks in assembler Having looked at the assembler help file " ORG [{ RAMn | ROMn },] #target_address [, #dest_address ] Defines target assembling address and ta…
... ROMn is used to define RAM bank (n=0..7) or ... />
nope
ORG RAM 7 , 49152 (seems to require ... a space between RAM and 7)
nope ... to assemble to a particular 128k ram bank? I only need to ... -
+2 Gray ProblemI'm trying to repair a +2 gray that behaves differently at every boot up. Some rare times I can get the selection window but pretty soon the characte…
... eprom containing Paul Farrow's 128k ram testing program. New Z80 tested ... Data Line 5[/b]" at RAM Bank 0 and 2 and ... -FFFF.
Also the message "RAM Paging Works Correctly" at the bottom ... must be on the contended RAM part since its causing visual ... -
New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…
... the 3DOS ROM routines and RAM paging to load the snapshot from ... initially just used the standard RAM pages but noticed some games ... I do plan to add 128k support.
At the ... -
Save 48k SNA from 128k Z80 snapshot?I have been doing RZX recordings of text-based adventure games. In the case of games made with GAC (Graphic Adventure Creator), where a map and solut…
... ". These are only available as 128k Z80 snapshots, which prevents me ... because I am running in 128k mode. (At least in Spectaculator ... games don't actually require 128k RAM (I'm sure GAC never ... -
My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …
... than a 6mhz one and 128k ram would struggle to store the ... clone and having more switchable RAM banks is definatelty advisable. Although ... them for). You can maintain 128k paging compatabilty by simply addressing different ... -
Spectrum helpHello all I run a website which is some sort of community/game information hybrid. It's dedicated to most gaming platforms (currently 62 of them). I…
... total addressable space.
The 128k therefore cannot by virtue of ... time linearly address that extra RAM. The 128k models page the top ... 's even have full 64k RAM paging modes.
Apart from this ... port for example).
The 128k also had a AY synthesiser ... -
Most engrosing Adventure GameThis is one for all you text adventure lovers. Of which I am one. I remember reading those Fighting Fantasy books when I was a kid. The ones where y…
... 's nothing to stop you paging in a 128k ram bank. -
Most engrosing Adventure GameThis is one for all you text adventure lovers. Of which I am one. I remember reading those Fighting Fantasy books when I was a kid. The ones where y…
handbook for newbies ?looking at questions what regulary appears on this forum i have an idea. why not to write short book for newbies. if few experienced coders write eac…
... asm on the spectrum, including 128k and above. i think the ... Beginner ( William Tang ) and the 128k/+2 version of the same ... , and the 128k/+2 gets into AY, video rams, and ram paging, various ...Most popular new features? I know some people like a spectrum to be emulated as authentically as possible, while others like myself like features which improve the gfx, sound,…
... , you have to emulate the paging in of the TR-DOS ... 'll have to emulate the paging of 128K RAM. However, you absolutely do ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... + should have been a 64K RAM machine where you could switch ... the ROMs to an all RAM mode from the factory. This ... 're talking about adding 16k RAM internally to put in place ... includes paging in/out the ROMs and any of the 128k RAM.
The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... 're talking about adding 16k RAM internally to put in place ... includes paging in/out the ROMs and any of the 128k RAM.[/quote ... 3 experience. And paging out any place in RAM is more expensive ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... />
[quote]
(8k/16k paging)
Actually, that's kinda ... 3 experience. And paging out any place in RAM is more expensive ... or any page of the 128k RAM. Ie I'm not talking ... segmented memory here, just physical paging.
[quote]
I ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... or any page of the 128k RAM. Ie I'm not talking ... segmented memory here, just physical paging.[/quote]
16K is way ... . When you go up to 128k memory you have to start ...Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…
... RAM, access to disk/CF/IDE, better memory paging ... than is available on a standard 128k. This ... capabilities. The MSX had 128K from the start and ... be added (up to 128K RAM I believe); the 2068 ... can have another 64K RAM in the cartridge slot ...
