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Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…
Does anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more available than the 4164. Winston? Piters??
TIA -
PC Power supply for SpeccyHi all, after 13 years with out playing spectrum games I am eager to play the old games. Thus I got up to the garret checking my old stuff. Two of m…
... and +12V at the 4116 (lower?) RAMs. Reason is as usual ... and +12V direct to the RAM. The speccy boots and I ... -5V and +12 to the ram. The queastion is know are ... -
Wipe Out by KB RamWhilst doing a long-overdue update for Speccy Spoilers, I noticed that one of the latest additions is a game which doesn't appear to be in the archiv…
... was written by a KB. Ram in 1987. It's very ... -
Compatible SpectrumsFollowing some recent coding exploits I've been thinking about compatibility of various models of ZX Spectrum. Yes, it's a common question on the for…
... had different pages of contended RAM (I think 1, 3, 5 ... the issue of different contention timings to the "original" models. It ... -
RAM electronics music machineHiya, Just bought a Ram electronics Music Machine from E-bay, and was wondering where I could get some docs for this product, I have managed to find…
Hiya,
Just bought a Ram electronics Music Machine from E- ... -
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…
... uses CMOS which has much lower output impedances, and strong, ... 32K of RAM, with the registers in the lower 16K and ... as you would some paged RAM. That's what I' ... the CPLD to arrange the lower 16K of the Speccy' ... ethernet board's ROM and RAM, and then only two ... -
RAM Upgrade for ZX Spectrum?Check out this [url=http://cgi.ebay.co.uk/ZX-SPECTRUM-ZX-PANDA-16K-EXPANDABLE-RAM-PACK_W0QQitemZ290193305868QQihZ019QQcategoryZ50223QQrdZ1QQssPageNam…
... -SPECTRUM-ZX-PANDA-16K-EXPANDABLE-RAM-PACK_W0QQitemZ290193305868QQihZ019QQcategoryZ50223QQrdZ1QQssPageNameZWD3VQQcmdZViewItem?_trksid=p1723.m144]EBay ... 't have had a 16K Ram expansion pack because a) none ... -
RAM Joystick Interface on a Spectrum +2Having sold one of my competition pro joysticks to a customer who has a grey Spectrum +2, I provided him with a RAM Turbo joystick interface (Kempsto…
... , I provided him with a RAM Turbo joystick interface (Kempston compatible ... -
Source of 4116 ramSomeone on eBay was selling 500 pieces of 4116 ram. The auction ended without bids, but he's willing to sell it in lots of 50 now. Someone in Spain a…
... selling 500 pieces of 4116 ram. The auction ended without bids ... -
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 ... -
Important for Game/Demo DevelopersHello Spectrum-friends, I just finished our new Disc-Magazine SCENE+ with newest games, demos, graphics and sounds from the Spectrum Scene. However,…
... enough memory, do not use RAM below 25000. If you set ... -systems as it needs some RAM for own OS (of course ... RAMTOP to 24499 or even lower, then just try to make ... -
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 ... -
Help using M3 ramFrom the Multiface 3 manual. [quote]6.0 The Use of Extra 8K RAM --------------------------- The MULTIFACE's 8K RAM extension can be accessed and us…
... The Use of Extra 8K RAM
---------------------------
The ... MULTIFACE's 8K RAM extension can be accessed and ... on how to access the RAM extension.[/quote]
... been using the Multiface 128 ram for my own programs, now ... -
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!
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?
ThanksANN: ZX Spectrum +2g ROM setI'm working on another modified ZX Spectrum. This one is based on the +2A. There's quite a lot of work to do on the hardware but the ROM set is prett…
... now handle command entry in lower case. With CAPS LOCK on ... provided you type them in lower case. It also provides some ... commands (available only in the lower screen):
DELETE n ... 128 debugged mode (better PLAY timings for MIDI)
If ...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
ThomasTutorial - 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…
... 32768) and memorable address in RAM
;initialise score
... ,201 at address 33000 in RAM
We'll assemble ... in some free bytes in RAM.
Now for the ... machine stack is in the RAM.
To write to ... /> If it is odd, lower the road position in hl ...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?
MickyMaking 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.
MickyLooking 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,
Thomaszx81 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 ...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 ...Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…
... pageable) and the contention timings on port 0x7FFD are giving ... unless I use the 64K RAM banking feature of the + ... and on its place the RAM is connected.
... />
A=1 for RAM 0,1,2,3
A=5 for RAM 4,5,6,3
A=7 for RAM 4,7,6,3
