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[Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…
... I'm learning Z80 asm on Speccy 48K, and ... it is, the first asm I've ever written ... [url=http://clrhome.org/asm/]the excellent ORG web ide ... end of attributes RAM and loop backwards. Attributes RAM = 768 bytes ... Remember this is my first asm code so be gentle :)< ... -
How do I know the RAM size?Just left my parents after cleaning out my pile of old stuff in their basement. Know what I found? My old ZX Spectrum.... Those were the days! Never …
... ZX81, though.
3K om RAM, my friends!
My question ... I tell what size of RAM I've got in my ... -
A great ROMBack in the early 90s my ZX clone (called "Cobra" if anyone's interested) had a sort of a "SamRam" (actually an alternate ROM accessed via a NMI) tha…
... and monitor used very little RAM and you could load even ... , but compared to many other asm/mon systems it is absolutely ... -
I need ASM for random numberI need to generate a random pair of coardinates in asm so that x=random no between 0 and 31, y=random no between 0 and 23. Any ideas on how to code …
I need to generate a random pair of coardinates in asm so that x=random no between 0 and 31, y=random no between 0 and 23.
Any ideas on how to code the above
Cheers -
HELP 4532 or 4864 RAM wanted !Hello My real spectrum fell off yesterday I know that one RAM memory chip is out of order There was 8 X HM4864P-2 but I saw in the Spectrum schemati…
...
I know that one RAM memory chip is out of ... here to set 16K of RAM so 32K are enough to ... -
RAM Music MachineBoxed RAM Music Machine Sampler (for 48K, Plus, 128K, Plus two) includes the tape, microphone, manual, even original mic stand! I last got this wor…
Boxed RAM Music Machine Sampler (for 48K, ... -
Boxed 32k Ram packPicked one up a few weeks ago at a car boot sale with a boxed 16k Speccy. Is the ram pack worth anything? Not seen any on Ebay. Thanks in advance, G…
Picked one up a few weeks ago at a car boot sale with a boxed 16k Speccy. Is the ram pack worth anything? Not seen any on Ebay.
Thanks in advance, Gnorman -
ZX-81 Ram Pack problemHi! I know this is a ZX Spectrum forum, but I am hoping someone here might be able to help me out... I have posted this to c.s.s. but noone was able…
... which is probably normal since ram
test takes a ... original
Sinclair ZX 16k ram pack issue 3 .
ram pack :
... a posibility of faulty RAM somewhere on the lower ... />
Also when no ram pack is present I can ... -
R Register, Contended RAM and ClonesHi. I've had a quick look at the CSS FAQ but didn't spot quite what I'm looking for (also the CSS FAQ doesn't have much detail of the clones - there …
... is the effect of contended RAM on the R-register? I ... run any code in contended RAM, but I do make several ... , but then without the contended RAM the HALT would take place ... -
RAM Test ROM?Found a link to this: [url]http://www.retroreview.com/iang/TestSpec4.zip[/url] in another thread, and fired it up in SPIN, but I have no clue how to…
... this to determine which physical RAM chip needs replacing, and/or ... -
256K RAM chips in Spectrum 128KSince I have lot of 256K RAM chips, and my 128K has RAM error, I think about replacing all 16 RAM (64K ones) chips with 256K chips. Then it would be …
... have lot of 256K RAM chips, and my 128K ... has RAM error, I think about ... replacing all 16 RAM (64K ones) chips with ... be 'Spectrum 512K' - something like RAM in Pentagon.
... bank switching of that extra RAM - we need 2 bits ... -
Where to get Spectrum RAMSigh. Even obsolete nixie tubes seem to be easier to get hold of than Spectrum RAM. I've tried the usual suspects (eBay and google searches), but not…
... get hold of than Spectrum RAM. I've tried the usual ... dead Spectrums with suspected bad RAM. It'd be nice to ... -
Spectrum RAM Paks...This jogged my memory (excuse the pun!!) : [url]http://cgi.ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX-SPECTRUM_W0QQitemZ150057889352QQihZ005QQ…
... ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX- ... with one of these 32K RAM paks!
My poor ... 16K model with this 32K RAM pak.
It ... them!
16K RAM paks were very popular for ... -
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 ... -
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? -
Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …
... what I see in the asm is this ( grabs from screen ... width, int length )
{
#asm
push ix
ld ... -
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 -
Help with creating .ayI am trying to create an .AY file for Sidewalk. Now this is the first time I am trying to do anything like this, so please bear with me. Using Spin's…
... (my experience with the Z80 asm is mostly theoretical, not practical ... correct. I saved the whole RAM ($c000 bytes starting from $4000 ... -
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 ... -
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 -
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- ... -
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 ...
