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ZX Spectrum 48K working as 16K from factoryGood morning I Have a Zx Spectrum 48k working as 16K , it came like this from factory. What can i do to solve this , and put it to work as 48K? Wha…
[QUOTE=camaisin;712040]
PRINT PEEK 23733 and then [ENTER]
< ... how the Spectrum ROM's RAM test routine works).
Update ... particular cases of faulty upper RAM. -
ZX Spectrum 48K working as 16K from factoryGood morning I Have a Zx Spectrum 48k working as 16K , it came like this from factory. What can i do to solve this , and put it to work as 48K? Wha…
... Spectrum with faulty upper RAM, but the initial RAM test routine passes part ... few bytes) of the upper RAM. All sorts of strange things ... get from the command PRINT PEEK 23732 ? Turn the computer off ... -
Full 16*16-digit BASIC multiplicationI liked Andre Adrian's 32-bit long multiplication routine so much that I decided to a decimal version. After all, 2^63 is only 9223372036854775808, a…
... declared sequentially in the BASIC, as the program expects them to be ... FIND
;transfer the 8 BASIC variables into 8*2-byte ... I=VAL s$(LEN s$): POKE var,CODE r$
ld ... -
C.G.D - Classic Game Designer[b]UPDATE: August 07, 2013 AN UPDATED VERSION OF CGD IS NOW AVAILABLE, DETAILS HERE: [url]http://www.worldofspectrum.org/forums/showpost.php?p=7155…
Mr-Tape, is it possible to import old CGD data in to the new one? Perhaps save a block of RAM out and poke it back in for the purpose of copying tile graphics over to the new one? -
best basic to useAs I like to do a bit of basic programming now and then what do you think is the best basic to work with? It's a pity the ramdisk can't be used on th…
Boriel's ZX Basic all the way. I ... more like many modern BASIC dialects than Sinclair BASIC - and that' ... having to worry about free RAM as it runs on ... all the RAM for your compiled code and data. You can ... assembly, or tamper with extra RAM pages in 128K models, ... -
C.G.D - Classic Game Designer[b]UPDATE: August 07, 2013 AN UPDATED VERSION OF CGD IS NOW AVAILABLE, DETAILS HERE: [url]http://www.worldofspectrum.org/forums/showpost.php?p=7155…
... possible to import old CGD data in to the new one ... save a block of RAM out and poke it back in for ... -
C.G.D - Classic Game Designer[b]UPDATE: August 07, 2013 AN UPDATED VERSION OF CGD IS NOW AVAILABLE, DETAILS HERE: [url]http://www.worldofspectrum.org/forums/showpost.php?p=7155…
... possible to import old CGD data in to the new one ... save a block of RAM out and poke it back in for ... -
New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
... -file...[/QUOTE]
Or a RAM test program...
Add some extra ... -
Hardware description - PLUS D interfaceThis new thread will contain onformations of different ZX devices. Some devices contain manuals, schematics or firmware for some chips, but some peop…
... replace with ";". But not in data lines. I mean... this can ... COUPE... Here is 512kB ram for basic/data and make corversion utility in ... SAM basic is easy. May be ... -
New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
[QUOTE=1024MAK;717784]Or a RAM test program...
Add some extra ... them on WOS plus 1 test cartridge). I thought about diagnostic ... -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... though - I now have a RAM Turbo interface which can accept ... suggested that there was a RAM tester / general testing cartridge ... assume that you mean the RAM tester from this web ... Interface2_RC_ZXC3.htm"]this[/URL], the RAM test program is [URL="http://www. ... -
Possible dodgy +2 - resets when loadingSo I have a grey model +2 with a recently refurbed tape deck (new belts and cleaned heads). It might be a product of bad loading, but from what I ca…
... official Sinclair/Amstrad RAM test comes on a ... infoseekid.cgi?id=1000328"]RAM Turbo interface[/URL] with ... /Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm"]RAM test program[/URL] (I should ... seen a pure software RAM test program for 128k machines - ... -
Possible dodgy +2 - resets when loadingSo I have a grey model +2 with a recently refurbed tape deck (new belts and cleaned heads). It might be a product of bad loading, but from what I ca…
... /Cartridges/Interface2_RC_TestCartridges.htm"]Offical Test Programs[/URL][/B]
RAM test from Zorn that you ... +2 (not +2A!) RAM test[/URL][/B] (note that ... to "make" a working program)
[B][URL=" ... +2 (not +2A!) RAM test TAP file[/URL][/B] ( ... -
Machine code/Assembly language back in the dayHello. Back in the 80s when I was a kid, I didn't learn Z-80 machine code, but I was always curious about it. Just recently I decided to explore Z-…
... a jump back to BASIC if a program had locked up, but ... conflict with the other program, plus the BASIC environment might not have ... , even if a machine code program error hasn't actually caused ... , it might well have corrupted RAM or else have left interrupts ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... />
References to data compression software are not hard ... but left to the BASIC loading/management program for better flexibility ... same loader when the decompressing program, ZX7 in this case ... loading routine embedded into BASIC management file with the ... -
What would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
... a block of
data.
The carry flag ... the header or the program/data block can now be ... /> XOR C Now test the byte against the< ... -
Games that checksum the ROMHello, is there a list of games that checksum the ROM and won't run (or maybe exhibit a different behaviour) unless it is the original 48k one? Searc…
... game loads a very big data block, beginning before memory ends ... ROM and then loading more data over RAM. After that, it checksums ... the data loaded, so if ROM is ... . I guess some other "alternate" BASIC runtimes will crash if not ... -
Writing faster BASICIn terms of structuring BASIC programs, what are the best ways allocate variables, functions, arrays? Any tips. I remember INPUT mag had some suggest…
... constant data tables, which could be put into a separate program, ... the main program and then saved with the BASIC. This would ... loaded in DATA as part of the BASIC, so the program load time ... />
With the current program structure, with no assembler lines ... -
Help with File Compressor by Mladen PopovicHi, I'm trying to compress BombJack (MCM) and transfer it to a +3 disk (Yes I own the original game :) ). I'm unsure about the addresses to enter in…
... a standard program data block in ZX Blockeditor. Add your basic after line ... 1 of the basic. RUN executes ... the machine code, not the basic. So save it with LINE ... at least 26000 for your basic selection. Ramtop could be as ... -
Turbo save?I'm doing some experiments with turbo loaders, and I don't know how to save turbo blocks on virtual tapes. Spectaculator and fuse don't seem to save…
... do this by adding turbo data, this will append to the ... to work because it's BASIC (even though it's loaded ... turbo (there's also some program data and variables) - if it was ... -
Calling people with Diagboards.....and who have toastracks or grey +2's with all socketed memory :) I'm finishing off modifications to the Diagboard firmware to expand its testing c…
[QUOTE]Which 128k machines are you talking about?[/QUOTE]
Oh, yes - we need also good RAM test program for black ZXes, including all RAM switching. -
dumping protected BASIC loadersI wrote this a few weeks ago but forgot to post it. It will load & list from tape/TAP/TZX any BASIC program which has been saved with SAVE, including…
... the size of the following program data block otherwise the tape won ... which is believed. The individual BASIC line lengths are printed ( ... get some info. Load the program data block at 'bytes'. Initialise ... all the bytes from the program data block have been read ... -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... inserted is functional, switching between test mode and normal mode is ... still works OK (in the test mode) for about 15 minutes ... random tests in the ROM test program and it was still OK ... [/URL]
Freezes after boot RAM test in PAPER 0 screen. -
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…
... the "upper" 32k RAM, because disabling said RAM allows it to start ... a key" test.
You have tested the data bus pull-up ... resistors ("resistor test Mark suggests ... /> Do you have any other test gear, e.g. a logic ... -
Spectrum +2 grey QuickJoy Joystickhello, i have a QuickJoy Supercharger 3 joystick and when i try to play a game in my spectrum the game crash, i am confused maybe i do something wro…
... can test it using a program? write a little piece of basic maybe ... ?[/QUOTE]
Just launch basic and wiggle the joystick around ... -
48K: Half of copyright message in the middle of the screen?!Issue two. Has 74LS08 over the Z80, but the ULA is 5C112E-3 (I think this should be a 5C102E??? - I have one, but I'm not sure if it is working, at l…
... problem to either the upper RAM chips or one of IC23 ... can remove the wire and POKE/PEEK from the upper 32K as ... the first byte of upper RAM (01010101 and 10101010 respectively). If ... with reasonable confidence which upper RAM chip(s) have failed.
Switch 128kb banks from Basichello! Please help to [U]correct[/U] switch 128kb pages from Basic. So, I remember, need to do: out 32765,17 e.t.c but before, i must to change some…
If you're in 48 BASIC via USR0 mode, then just ... /> If you're in 128 BASIC, POKE 23388, 16+bank number: OUT ... 32765, 16+bank number (or POKE 23388, 16+bank number: PAUSE ... at the start of your program, will ensure it's safe ...Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... loading red green lines , shows program name , the yellow blue lines ... crash but fails to load program.
Other thing is I ... do not hear the program load on the zx speaker ... command.
Running the RAM test program I found here I get ...48K Ram Check Command not workingI am trying to repair my Spectrum 48k. It is having issues loading games, sometimes they load all the way to launch and then the speccy resets. Oth…
... want to use the Microhobby RAM test program. It will tell you which ... pause/resume loading, as the test requires you to stop the ... . As you are going to test a 48K machine, input 48 ... (very short)
The test itsef does a series of ...48K Ram Check Command not workingI am trying to repair my Spectrum 48k. It is having issues loading games, sometimes they load all the way to launch and then the speccy resets. Oth…
Yeah IC16 was for me. Apologies if I've caused any confusion ;)
I tried the Microhobby RAM test program anyway. Put the TAP file onto tape and gave it a go and it works great. Does indeed show IC16 as being at fault in my case.
