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Spectrum Basic InterpreterHello. I started this days a strange project: an interpreter of the Spectrum Basic that can run in a Spectrum. Here is a very preliminar version: […
... is not a ROM replacement, it runs in RAM. It costs some ... -
Betadisk RAM modificationHello! I've ocassionally found this on the web: [url]http://www.nairam.sk/betadisk.html[/url] [url]http://www.nairam.sk/betadisk_02.gif[/url] Doe…
... it adds a little shadow RAM into betadisk to be paged ... -
Best replacement for ZTX650?What is the best replacement transistor for the obsolete ZTX650? I've read that TIP31 will do the trick. Is there a decent equivalent from the BC or …
What is the best replacement transistor for the obsolete ZTX650?
I've read that TIP31 will do the trick.
Is there a decent equivalent from the BC or others transistors? -
Black paper, white border. Ram fault?We have a speccy that wont work properly. When we power it up, we get white border around a black screen. We swapped the rom and ula with a working o…
We have a speccy that wont work properly. When we power it up, we get white border around a black screen. We swapped the rom and ula with a working one, and we got the same result.
is this a ram fault? How can we check ram chips? -
Any interest in new low-cost mass-storage interface with 512K RAM?I've recently added support to ResiDOS and the +3e ROMs for SD/MMC card interfaces; in particular, ZXMMC (which has no onboard RAM and so is only sup…
... (which has no onboard RAM and so is only supported ... of on-board non-volatile RAM (which would allow it ... be the 512K battery-backed RAM and a snapshot button. ... in the built-in RAM and are instantly available ... run from the built-in RAM, including ZX80 and ZX81 ... -
Wanted 10 - 4116 Ram ChipsHi Can any one help I am trying to get hold of 10 4116 RAM chips for a 48K Spectrum. Does any one know who might stock them. I can get a minimum of …
Hi
Can any one help I am trying to get hold of 10 4116 RAM chips for a 48K Spectrum. Does any one know who might stock them. I can get a minimum of 50 from Hong Kong but only need 10.
Best wishes
Martin Baugh -
Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …
... /> org $8000 ; run in fast RAM
di ; disable interrupts ... />
; copy BASIC ROM to RAM
ld hl,$0000 ... shadow RAM into ROM area
ld a,$03 ; select lower ... -
Testing RAM Chips After RemovalHi I am going to use Winstons Hot Air Gun method of removing the RAM chips from a 4S circuit board. I wish to check the RAM chips, I have a Logic Pr…
... Gun method of removing the RAM chips from a 4S circuit ... . I wish to check the RAM chips, I have a Logic ... -
Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…
... the chips in the lower 16KB of RAM are dead, however ... which uses only the lower 16KB of CPU's ... chip (which occupies the lower 16KB on Spectrum's bus ... me from testing the lower 16KB of RAM. I can't ... RAS signals for the lower 16KB of RAM? What happens if ... -
Ram Turbo InterfaceHi all, Can any one tell me if the Ram Turbo Joystick Interface is compatible with Kempston Joysticks? Or are both the Joystick ports Sinclair 1 and…
Hi all,
Can any one tell me if the Ram Turbo Joystick Interface is compatible with Kempston Joysticks?
Or are both the Joystick ports Sinclair 1 and 2
It is the one with the Rom port on it. -
+2B ram chips?Hi all, I have got 2 Plus2B`s and 1 Plus2 gray case. Ok the one Plus2B don`t work, so I tried to see if I could pin down the problem. I changed the …
... br />
There are 4 ram chips on sockets on board ... Plus2B.
The one ram chip IC6 had a pin ... br /> I then removed 2 ram chips IC6 and IC4 replace ... dwith 2 other ram chips that to be honest ... br />
If its the ram chips then I shall buy ... -
+D and RAM Turbo interfaceJust a quick note to let a few guys in particular know that my RAM Turbo does in fact work with my +D interface. I checked continuity through the RA…
... particular know that my RAM Turbo does in fact ... I checked continuity through the RAM Turbo, and found all lines ... used to have a second RAM Turbo, and of course ... is a clone. The other RAM Turbo, which, alas, ... external devices, or som RAM Turbo interfaces don't ... -
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 ... -
What I hate about computers and/or video gamingYesterday I spent approximately four months (subjecively that is, objectively it was around two to three hours) fixing my mate's PC. I won't bore you…
... the 360) XBox. My current (replacement) drive is now having trouble ... XBox only having 64MB of RAM (which is shared between the ... program and the video RAM). The game authors did wonders ... with this tiny amount of RAM, but more would have been ... -
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 ... -
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 ... -
Issue 1 ZX Spectrum for SaleBefore I go down the route of shoving this on ebay, I would like to offer fellow WoSsers the opportunity to express their interest in this item. It …
... (the one with the 32K RAM on a daughterboard) in an ... />
I will supply a replacement blue-grey keyboard mat with ... -
Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…
... ..
The Speccy 48 ULA Replacement is *almost* here ;)
Anyway, the machine with ULA replacement doesn't quite boot up ... -
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 ... -
Replacement loudspeaker for rubber key 48kI'm fixing one of my rubber key 48k. Just ordered a membrane for it but I also need to find a replacement loudspeaker for it. The original some how q…
... also need to find a replacement loudspeaker for it.
The ... -
ULA Book - Target Audience?This is probably of most intrerest to hardware chaps, but a greater community input would be good. I've been turning all my ULA analysis into a love…
... as creating a complete ULA replacement, so effort is split between ... that make up the Specturm (RAM, ROM, Z80 etc). This might ... -
ULA Replacement WORKS !Hi chaps. Lots of activity over the last couple of weeks, and _finally_ we have [B]a working ULA replacement[/B] !! The analogue components such …
... have [B]a working ULA replacement[/B] !!
The analogue ... -
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 ... -
Keyboard replacement for ZX-81Where can I obtain a keyboard replacement for the ZX-81. Can't find any on eBay. I wonder if there is a better keyboard available to replace the ZX-8…
Where can I obtain a keyboard replacement for the ZX-81. Can't find any on eBay. I wonder if there is a better keyboard available to replace the ZX-81's?
Paul
