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Folks with real speccies - test this!A lad from another forum has written a music demo for the Speccy, but he can only test it on ZXSpin, so needs some helpful chaps to record this to ta…
... Speccy, but he can only test it on ZXSpin, so needs ... -
Memory diagnostic toolIs there any sort of memory diagnostic tool for examining .Z80 files so I can easily identify large areas of blank memory? Scrolling through ZX Spin…
Is there any sort of memory diagnostic tool for examining .Z80 ... identify large areas of blank memory?
Scrolling through ZX ... just like to view the memory in graph form... If that ... -
Importing binary data to paged memoryI really could use some hint :) Many emulator have a feature - open/ import binary. I select the file, give starting adress and voila ! But most of…
... of them work with main memory only. It's not problem ... :( I did everything, then checked memory in debugger and nothing changed ... -
Help reviving a 128 +2 GreyHello m8s, my turn to ask for some help with a +2 Grey. Got it for spares as I do have a working one but I could not resist to try and fix it. As us…
... a memory problem, hooked a ram tester loader with Paul farrow test ... same error on Paul's test and stil 0v on pin ... -
X128 and EMS memoryI installed x128 emulator (latest v0.94 build) on my old notebook Intel P1 266MHz MMX, but I have one problem. It seems that the x128 is very sensiti…
... is very sensitive to EMS memory managers (EMM386, Jemm386) and hangs ... to work, together with EMS memory installed? -
Compatible Memory Chips for Issue 2 48K MotherboardHi I was wondering if anybody have a list of manufacturer chips which is compatible with the Issue 2 48K Motherboard, especially the upper 32K RAM.…
... of the 8 RAM chips test faulty. I replaced this with ... -
How to test Z80 Code?Hi All, Is there a way to test a block of z80 code (nothing speccy specific in it) with many different inputs? The reason I ask is that I'm writing…
... /> Is there a way to test a block of z80 code ... -
Rubber Key RAM - Repair?Hello there everyone! I'm a long-time lurker on here - ROMs, documentation etc. but yesterday I finally ponied up for my own speccy, just like the on…
... 3D Starstrike: 4 - Out Of Memory
On Driller: M - RAMTOP ... /> I carried out the RAM test I found elsewhere on this ... -
Adding a pause key to ArkanoidHaving rediscovered the simple pleasure of playing 1980s games on genuine 1980s hardware, I've also remembered that emulation can provide a feature m…
... the in-game controls. To test my hypothesis, I put a ... routine and load it into memory at 0xFCB1 (decimal 64689).
memory page containing the video RAM ... -
Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... poke a few locations of memory. For reasions I cant remember ... /> Hmmm...
Time to test the theory, no armchair machin ... on the registers... Time to test the theory again.
Copying data between memory banks in USR0 modeI am experimenting with Funky Fungus to load the majority of its data (levels, screens, music etc.) into memory banks 1, 3, 4, 6 and (partly) 7 by sw…
... (levels, screens, music etc.) into memory banks 1, 3, 4, 6 ... 49152 and above, I need memory bank 0 to be switched ... /> I understand loading data into memory banks is easier because all ...Assembly - Loops bigger than 255Hi, It looks like it's a bit difficult to make loops with more than 255 cycles on Z80 machine code, since the 16-bit decrements (DEC) do not alter a…
... program to fill the video memory,
; Created as a FOR ... ,16384 ; Beginning of the graphic memory
LD DE,1024 ; Loop ...
XOR A ; Prepare to test B
OR B ; If ... (HL),62 ; Fill the video memory with this number
INC ...Test EpromHi, where can i get test eprom for spectrum/timex machines? I have a programmer. Thanks, Chapas
Hi,
where can i get test eprom for spectrum/timex machines?
I have a programmer.
Thanks,
Chapas+2A shows test screen and beepsNew day, new problem. A +2A, which seems to be in good condition, shows the colored test screen when powered-up and beeps about once every second. Am…
... good condition, shows the colored test screen when powered-up and ...Collision detection for interlocking shapes[SIZE=3][FONT=Calibri]I?m looking for some advice as I?m not sure how to resolve the following problem. I have an in memory structure that holds info…
... problem. I have an in memory structure that holds information about ... fine. I now want to test for collision so that the ... am writing, both speed and memory size aren't too important ...Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
... 'm looking for a simple memory transfer routine that shifts 32 ...Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…
... all of the 4116 memory which will die a ... present and all the 4116 memory was getting warm, so ... I desoldered the 4116 memory, and repowered the board and ... ordeal and the dead 4116 memory was just loading this ... I/O ports would get contended) forming part of a ...Compact Flash Card In "Memory Mode" - (Help)Hello my fellow WoS'ers I have been developing a Z80 8bit interface with a compact flash card port based on Pera's ZXCF "memory mode" interface for …
... based on Pera's ZXCF "memory mode" interface for the +2AB ...Math Quiz - MultiplicationThe topic is fast multiplication routines, from 8x8 to 32x32 and all points in between. These functions sit underneath floating point libraries, gen…
... takes a silly amount of memory for tables. So I've ... /> The cost of the first test is 18 cycles. The 8x8 ... savings of 16 cycles. The test outweighs the speedup of using ... multiply.
The second test will be the same except ...How to load a +3 dos file from disk to memory in z80Hi all again, Are there any example z80 code listings (not BASIC) to load a +3 binary dos file from disk to a specific memory destination? Thanks.
Hi all again,
Are there any example z80 code listings (not BASIC) to load a +3 binary dos file from disk to a specific memory destination?
Thanks.Emulator support for East London Robotics SP80 memory expansion?Do any emulators support the [url=http://www.worldofspectrum.org/infoseekid.cgi?id=1000377]East London Robotics SP80 memory expansion[/url]? That add…
Do any emulators support the [url=http://www.worldofspectrum.org/infoseekid.cgi?id=1000377]East London Robotics SP80 memory expansion[/url]? That adds another 32KB of RAM which you can page in/out at address $8000.What is this spectrum game I dimly remember?Hi all, Ages and ages ago the collective genius of this forum helped me identify a game of my childhood as 'They Stole A Million'. Well, another mys…
... a room which has 'opaque test tubes'. Soon after entering this ... agent which was in the test tubes. The reason I remember ... from the depths of my memory :)New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …
... , however I have prepared new test which can be used to ... owner would run the ptime test from [URL="http://zxds.raxoft ... timing, please run the btime test from the same archive and ...4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…
... />
I considered a memory mapped approach, but that seemed ... will read n from memory and then in the ... is being executed and to test if the address read ... own data to the spectrum memory. It would then be ... byte in the spectrum memory with one in the ...Loading data from 128 memoryAfter all these years I have come across the LOAD! in 128 basic for storing/restoring data in the 128 memory. How do I go about implementing this in…
After all these years I have come across the LOAD! in 128 basic for storing/restoring data in the 128 memory.
How do I go about implementing this in machine code?
Thanks in advance...Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…
... Cassette player so I could test a few games. However when ... over the CPU (which if memory serves was a repair for ...WOM Memory Signetics 25120 Series 9046NHello, here: [url]http://www.ti.com/ww/en/bobpease/assets/www-national-com_rap.pdf[/url] at pages 128 und 129 you can find information about a very …
... information about a very usefull memory that unfortunately is not (more ...ESXDOS 0.8.5 and .Z80 on +2B or +3Last week I received some .Z80 snapshot files from a DivMMC EnJOY! user to test. These files didn't work on his ZX Spectrum +2B. [URL="http://benophe…
... a DivMMC EnJOY! user to test.
These files didn't ... , as there was some 128K memory detection bug fixed, but still ... is it because of the memory map that is different? Allthough ...Read Data from memoryHi there. Not been on this scene for a long time. Does anyone know how to do a routine to read data from memory(peek..etc) rather than using lines of…
... routine to read data from memory(peek..etc) rather than using ...48k memory dump to 128k???Having problems getting a 48k snapshot to load into 128k mode using ZX Spin. Tried saving 48k memory as a binary file and loading it back in 128k mo…
... .
Tried saving 48k memory as a binary file and ...
