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Comparison of RS232 port on Interface 1 with that on Spectrum +3/+2AHi everyone, I'm writing a tool (in machine code) to transfer data (for example, an emulator snapshot) between a PC and a real ZX Spectrum, over t…
... to CTS/RTS, but then disable the buffer -- since I encountered ... ) can send up to 16 bytes after you dropped CTS. And ... drop in CTS will cause bytes to get lost. ROM code ... -
New game: SolarGun 1.0[img]https://dl.dropboxusercontent.com/u/75238938/solargun4.png[/img] [img]https://dl.dropboxusercontent.com/u/75238938/solargun5.gif[/img] (that g…
... reti, but that's 2 bytes, and we aint got room ... "
sub-section "Interrupt Enable/Disable"
The EI instruction ... -
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... stack and, as such, they disable the interrupts whenever they are ... is also the reason they disable the music if spectrum_model > ... minimal (e.g. zero 3 bytes starting from #9B47 in the ... , there's no need to disable the interrupts at any point ... -
Bored of the Rings coded messageI was browsing [url="https://tcrf.net/"]The Cutting Room Floor[/url] recently and stumbled upon the entry for [url="https://tcrf.net/Bored_of_the_Rin…
... , instead of just incrementing it (disable the two lines marked "**"), with ... all. (Skip the 7,202 bytes from $C289 to $DEAB, as ... -
A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…
... sdcc version comes out 600 bytes shorter. This will only happen ... -
ZX Spectrum CartridgesI have been thinking of "cloning" ZX Cartridges for a while (case, board and silicon skirt), to be able to make new releases or replace damaged cartr…
... logic you only miss 4 bytes of 16384. With paralel load ... you miss 64 bytes. Multiply this by 3 for ... (your Menu, I presume), to disable ROMCS. NOTE: I'm assuming ... -
Help needed with MIA software with custom (?) loaderHi, I've got into my hands recently a bunch of Polish educational software which are unknown MIA on WOS. I believe they are protected with some…
... ROM)
0xEA6E DI ; Disable interrupts during save
0xEA6F ... /> 0xEA99 OR E ; ...all bytes saved
0xEA9A JR Z ... ; Origin
0xEAE1 DI ; Disable interrupts during load (ROM)
I'm writing an Operating SystemOkay this might seem like a bait thread, but I am legitamately interested in figuring out how to write a multi-process system for the ZX Spectrum (no…
... -bit differences that are 101h bytes apart are locations of addresses ... to 0x0101h assures that both bytes are changed for each address ... system addressing problems (i.e. disable POKE command).
Voila ...Saving and loading data in assembly.I want to add a save and load feature to an project I'm working on. Since it's not that much data in size I thought I'd use the ROM functions, but ho…
... ; 17t - call ROM routine SA-BYTES+4 to skip break to ... - restore d
di ; 4t - disable interrupts
call &0562 ...48K Issue 2 Spectrum showing exactly 16KI've acquired an issue 2 and it quickly became clear that only 16K of memory is available. I've read that some early 48K Spectrums with malfunctionin…
... . So for the "upper" 32k bytes of RAM, you need eight ... fails completely, you lose 32k bytes of RAM.
There ... purpose make link to disable the "upper" 32k bytes of RAM, but ...Why doesnt this work???Simple piece of code wont do as it should, just want to fill the top 22 lines of screen with an attribute value (150) but it wont have any of it. Som…
...
di ;disable interrupts for the last few bytes so an interrupt ...Emulator ExperiencesMy workflow is to compile on command line and then launch an emulator to load the .TAP file. In this experiment I'll try to use memory map viewer to …
... X) will resume emulation and disable the debugger entirely.
bytes side by side, all values ... in options, but the 10-bytes-wide view stays.
- The ...ZX-Paintbrush and global palette and ula+ supportHello, I think I need some help for the palette issue of ZX-Paintbrush. I want to check whether the way I'm about to clear the palette handling i…
... be able to enable and disable the ula+ mode easily. Since ... with size of 6912+64 bytes), the special palette "ula+" is ...ZX-Paintbrush and global palette and ula+ supportHello, I think I need some help for the palette issue of ZX-Paintbrush. I want to check whether the way I'm about to clear the palette handling i…
... be able to enable and disable the ula+ mode easily. Since ... with size of 6912+64 bytes), the special palette "ula+" is ...Memory questionsQuestion 1: PRINT PEEK 23732+256*PEEK 23733 returns 65535 for a 48K Spectrum and 32767 for a 16K Spectrum. PRINT PEEK 16388+256*PEEK 16389 return…
... expansion. The 16k byte expansions disable the internal RAM chip(s ... instead adds it's 2k bytes to the internal 1k byte ... , making a total of 3k bytes.
I don't ...Memory questionsQuestion 1: PRINT PEEK 23732+256*PEEK 23733 returns 65535 for a 48K Spectrum and 32767 for a 16K Spectrum. PRINT PEEK 16388+256*PEEK 16389 return…
... in 30 minutes" program on Bytes: Chuntey which looked promising - the ... expansion. The 16k byte expansions disable the internal RAM chip(s ... instead adds it's 2k bytes to the internal 1k byte ... , making a total of 3k bytes.
I don't have ...Help understanding the Z80.So I have a Z80 CPU and a 32k ram chip. I understand how they connect. (Data and address busses, chip select etc.) But how would i input information…
... top of memory and then disable itself so that RAM can ... sectors (say 128, 256, 512, .. bytes - sector size depends on the ...ZX-Paintbrush and global palette and ula+ supportHello, I think I need some help for the palette issue of ZX-Paintbrush. I want to check whether the way I'm about to clear the palette handling i…
... as ZXP format.
3. Disable the ULA+ mode. Save the ... p.3.
5. (Optional) Disable the ULA+ mode, reset the ... text-based file, or to disable ULA+ mode manually and restore ... a separate block of palette bytes in present in a ZXP ...ZX-Paintbrush and global palette and ula+ supportHello, I think I need some help for the palette issue of ZX-Paintbrush. I want to check whether the way I'm about to clear the palette handling i…
... p.3.
5. (Optional) Disable the ULA+ mode, reset the ... text-based file, or to disable ULA+ mode manually and restore ... a separate block of palette bytes in present in a ZXP ... having 'plain ZX Spectrum 768 bytes' attribute format, roughly speaking. It ...ZX-Paintbrush and global palette and ula+ supportHello, I think I need some help for the palette issue of ZX-Paintbrush. I want to check whether the way I'm about to clear the palette handling i…
... ; ULA Plus palette >> Disable ULA Plus palette.
; 3 ... .scr. Should be 12,288 bytes.
; 4) Discard and ... . Should be 64 bytes.
; The first $1800 bytes of screen.scr ... contains 4 CLUTs of 16 bytes each, loaded where SetPalette routine ...ZX-Paintbrush and global palette and ula+ supportHello, I think I need some help for the palette issue of ZX-Paintbrush. I want to check whether the way I'm about to clear the palette handling i…
... ; ULA Plus palette >> Disable ULA Plus palette.
; 3 ... .scr. Should be 12,288 bytes.
; 4) Discard and ... . Should be 64 bytes.
; The first $1800 bytes of screen.scr ... contains 4 CLUTs of 16 bytes each, loaded where SetPalette routine ...z88dk multicolour enginesI've been trying to work out how the multicolour sprite engines have been implemented in z88dk. It's not obvious. Looking in the source, I found …
... 65361, leaving the stack 7 bytes to grow downward. The characters ... asm or c). Instead just disable interrupts to stop bifrost with ...z88dk multicolour enginesI've been trying to work out how the multicolour sprite engines have been implemented in z88dk. It's not obvious. Looking in the source, I found …
... both
* binaries with zero bytes filling any gaps.
*
// disable entire tile map
Simple way to add AY music to AGD games!I have written some scripts and asm to autobuild interrupt driven AY music into any AGD game. The play routine and music is stored in bank4, so y…
... and before the last 768 bytes of RAM thats reserved. Also ... system you will need to disable AY in the Misc menu ...shadow regs musingIn the process of optimising some assembler, it occurred to me how great it would have been if the Z80's shadow reg opcodes had been a bit more fully…
... more ED instructions to enable/disable them so that the Z ... two of them as prefix bytes that temporarily select the alternate ...ZX Spectrum Z80 Development Environment on WindowsHi Folks, Just wondering what the recommendation is for a ZX Spectrum Z80 Development environment on Windows? Getting fed up with hand coding Z80…
... users can manually enable or disable parts of source code, local ... it is and how many bytes it takes. I can do ...ive found an attr scrolling routine but i want to remove the smaller scroller within it, etc.https://pastebin.com/K4nG3xbX also i would like to be able to change the colours and not have a shadow. http://www.worldofspectrum.org/pub/sin…
... code]
Character scroll, disable $FA17 CALL L_FA27
...
Attribute scroll(1), disable $FB17 LD (HL), A
Attribute scroll(2), disable $FB1D LD (DE), A< ... to next attribute row (+32 bytes)
POP BC ; ...
