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Memory paging in 128 KB - 64KB RAM possible?I have found a quote in Spectrum 3 manual (available at WOS) -------------------- In the +3, we have crammed in more than twice the amount of memory…
... fact 131072 bytes of
RAM and 65536 bytes of ROM ... and 48K of RAM ([B]or 64K of RAM with no ROM ... -
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…
... 2. All functions to get access to the disk content is ... snapshot into free MB02+ RAM and to switch between these ... is to have enough RAM installed and that is ... such function)
b. Access (copy from/to) to a ... DOS do not need to access Slave HDD. This could ... -
Spin problems/issuesI am running Spin 0.666 and have noticed a few issues (some are bugs, some might be just me). I am using Vista sp1 (yeah I know!), and I've seen Dunn…
... the fact that the RAM page field is too ... go to any address in RAM, eg:$8000. Select edit ... what is really in display RAM (if you just use ... Now insert the tape again, Access violation!
If you re ... point won't generate an access violation report, but you ... -
RAM Turbo Interface + DivideHi! I have ordered a Divide (the one without the passthrough) and I obviously want to play using a joystick on my Speccy+. :D Does anyone know (or c…
... (or can try) if the RAM Turbo Interface, which has full ... -
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…
... some detail information about RAM paging on the Spectrum ... we have 4 different RAM pagings depending on the ... TC2068, TS2068
No RAM paging, but always fixed 48k ... the first 8 RAM pages (RAM 0..RAM 7) is paged ... the second 8 RAM pages (RAM 8..RAM 15) is paged ... -
Copy interface ROM content to RamHi all, I have a very rare logitec centronics and disc interface. To save its ROM content I would like to copy it Ram and store it somewhere. How ca…
... would like to copy it Ram and store it somewhere. How ... routine to copy from Ram area to Ram area could be sure ... -
Another badly behaved RAM upgradeI have a 48K issue 4A board (yellow it is) that was a 48K machine from new, but only reports 16K working with the Sinclair ZX Test ROM in an Int2. H…
... sockets and installed all new RAM. Same problem!
So ... that are part of the RAM upgrade, they all check out ... thats the whole of the RAM upgrade chippery tested!
Screen access in assemblerI am again troubled by the unusal screen design of the Spectrum. :) If I want to do something with, say, a 16x16 bit block of the screen (in the sam…
So... you want to format your 3.5" as 720K eh?Well, i've been trying to get hold of an application to make proper use of my 3.5" +3 floppy disks but i haven't been able to find any. I stumbled up…
... ,A ; B holds the RAM page in use during operation ... />
DISK DI ; Main +3DOS access subroutine - Disable interrupts before paging ... 16 ; Page ROM 0 and RAM PAGE 6
LD ( ...Dangerous Allram Mode On +2a / +3ZX Spectrum 128+2A and +3 support allram feature on port 1FFD. On this ZX models is very dangerous set allram if is connect any interface with extern…
... 8189,1) and CPU will access to memory space 0-16383 ... be damaged. DIVIDE detect memory access to low 16kB, disable both ... and connect external memory rom/ram to data bus. If in ... /+3 can't disconnect ram) and ZX ram data will collide with ...err, I like wrote this years ago, and just found it archived.[b]read it, and say it's crap if you want, but do not go on about the technical side, cos it was bullshit, we all know it, and the end makes no sense…
... didn't own or have access to. He had 34 8 ... soon advanced far beyond 48k RAM and bulletin boards that one ...ram unity for 16k allows also to plug a joystick?hello I?d like to know if a RAM interface for a 16k spectrum allows also to plug, together, a joystick? Thanks
hello
I?d like to know if a RAM interface for a 16k spectrum allows also to plug, together, a joystick?
Thanksftp accessWas there a problem with access to the magazine scans? Or is it just my PC/firefox/IE (yes I tried Opera and IE aswell as FF). I've been unable to …
Was there a problem with access to the magazine scans? Or ... /> I've been unable to access them for a week or ... that I still can't access them, but I just checked ... I'm now able to access ones that I couldn't ... 'd be great if the access continued for me, but knowing ...Normal for WinXP to constantly access hard disk?On my WinXP PC the hard disk is constantly giving little clunking sounds due to disk accessing - which I find a bit irritating. On doing some investi…
... it normal for them to access the disk so often? Are ...RAM Turbo on +2AHello Spectrum-fans, does anybody know if the RAM TURBO Joystick interface (this with cartridge slot like the INTERFACE2) can be used with a +2A? I …
Hello Spectrum-fans,
does anybody know if the RAM TURBO Joystick interface (this with cartridge slot like the INTERFACE2) can be used with a +2A? I don?t want destroy a machine to test it.
Regards
ThomasThe Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…
... its own low-level disk access. And most importantly, it's ... we have 8K ROM + 8K RAM to play with before we ...Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …
... joints for the bottom-left RAM chips seem to be very ... physically on the board which RAM chip the display attributes is ... on. This all points towards RAM for me - I don't ...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 ...How much ram has my ZX Spectrum?How can I see how much ram my ZX Spectrum has? C64 has this info in the title screen, the Spectrum not. Thanks! Micky
How can I see how much ram my ZX Spectrum has? C64 has this info in the title screen, the Spectrum not.
Thanks!
MickyTest single ram chips?Is it possible to test single ram chips? Micky
Is it possible to test single ram chips?
Micky4116 ram chipsI need some ram chips to fix my 48k + issue3b, I have done the composite video mod and it works, now i just wanna play games on it but its stuck on r…
I need some ram chips to fix my 48k + ... advised to replace the lower ram chips. I can't test ...Making BASIC occupy less RAM?I risk being told to search the forums and the entire archive of type-ins, but here it goes... Is there any known utility to do all the hard work of…
... a BASIC listing in high RAM, and then a routine in ... "uncompressed" listing would fit the RAM just fine. How would I ...Ram joystick interface and Competition ProMy Ram joystick interface does not work probably with a Competiton Pro joystick with autofire (on a ZX 48K). Is this normal? My Competition Pro wit…
My Ram joystick interface does not work probably with a Competiton Pro joystick with autofire (on a ZX 48K). Is this normal?
My Competition Pro without autofire works very well.
MickyUnlocking MDB Access files.My wife has brought home an access database file her work were using to store some records. The file uses a form to take the user to various input a…
... wife has brought home an access database file her work were ... , I know how to use access and create forms myself and ...Looking for some 48k RAM (upper 32k bank)Greetings, I was wondering where I could find some upper RAM for a 48k (issue 4A). It's the Texas Instruments TMS4532-20NL4 P8419 (or any compatib…
Greetings,
I was wondering where I could find some upper RAM for a 48k (issue 4A).
It's the Texas Instruments TMS4532-20NL4 P8419 (or any compatible RAM).
Thanks,
ThomasMass storage - why backup battery?I wasn't sure to post this under "hardware" or "development", but here goes: There are these mass storage devices for ZX Spectrum, and on many desig…
... for use in BASIC, to access files, maybe change directories and ... the hell do you need RAM for on an interface like ... such a battery backup-ed RAM, that can't be done ...WILD PLAYER for DIVIDE / DIVIDE+ / MB02+IDEIt's new music player by BUDDER. Is designed for DIVIDE and all compatible IDE interfaces. This software work with FAT32 or CD/DVD. Use comfortable F…
... . Use comfortable FAT32 browser and access to IDE ports (don't ... . WILD PLAYER need minimum 128kB ram (for ZX128 models) or 256kB ...zx81 internal ram upgrade?just curious if others have? I mean can you just rip the memory out of the ram-pack and use that.. as I'd rather just have the unit upgraded interna…
... the memory out of the ram-pack and use that.. as ...LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…
... the detailed timings of contended RAM. It gives timings for Z80 ... in, or reading/writing, contended RAM.
I can decipher ... 48K, or double buffered -- paging RAM bank 7 into a 128K ...Broken ram or what?Hi! I own ZX Spectrum 48K. When i run command PRINT PEEK 23732 + 256 * PEEK 23733, I should get answer 65535? But i get 49151. In my machine the upp…
... test program which can test ram. It also says that machine ... has broken ram. And if i remove upper ...
