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SkoolKit 4.2SkoolKit 4.2 has been released. SkoolKit is a set of command line utilities for disassembling Spectrum software, into ASM format or into a bunch of …
Ok, I'll try.
This is a pretty standard Z88DK project so I don't know if the registers are set in any special fashion other than setting the stack and the program entry point. -
Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…
... _sp1_struct_cs_prototype
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; special function registers
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Developing in CI am beginning a small project for the ZX Spectrum. I intend to write the thing in C, doing the entire development on PC and then transferring someho…
... i/o space "special function registers (sfr)" and has special syntax to declare ...Were there other graphic modes for the ZX Spectrum?I've read that there was a "hi-color" mode that allowed the color clash to be 8x1 instead of 8x8. Maybe I have the name of that mode wrong. I'm…
... inexpensive. So that meant no special video graphics chips were to ... ULA. There are no programmable registers in the ULA for the ...Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…
... under sdcc. sdcc expects its registers not to change value through ... special circumstances you will have to save the value of changed registers ... optimizer and if NIRVANA_start() affects registers, may cause bugged code to ...Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... it is only useful in special cases.
For educational ... than you could handle in registers. You'd be likely to ... 't have to constantly juggle registers.Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... working set of variables in registers (working set = stuff you need ... extra 16-bit / 8-bit registers.
[quote="Hikaru;858055 ...z88dk TutorialHi, Could anyone direct to to a recent MS Windows based tutorial on getting started with z88dk. I know a small amount of C, so it's more the comp…
... of those special targets because it has restrictions on what registers you ... AF', IY, some exx set registers because they're reserved by ...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…
... AND result), to mark that special condition has been triggered, then ... [/b]and [b]DE [/b]registers, followed by another instruction like ...IXL and IXHI don't know much about undocumented instructions but I get the impression that [b]LD A,IXH[/b] or [b]LD A,IXL[/b] (B, C, D, E also fine, HL not) are…
... because IX and IY are special cases of HL. It's ... some modifications related to index registers).IXL and IXHI don't know much about undocumented instructions but I get the impression that [b]LD A,IXH[/b] or [b]LD A,IXL[/b] (B, C, D, E also fine, HL not) are…
... because IX and IY are special cases of HL. It's ... some modifications related to index registers).[/quote]
I think ...Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…
... zilog manual). Take note of special architectural features (block copy, ... : if you're using registers other than the accumulator " ... and deliver parameters in the registers expected by compute_lp. Then ... task at hand) in registers inside those inner blocks. ...Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…
... of 'registers' you have to use, and some have special purposes you ...RANDOMIZE USR, PRINT USR etcHello just wondering why is it called RANDOMIZE UsR what does randomising have to do with it ? When calling machine code routine from adress x you ty…
... is referred to as registers. It has registers A, B, C, ... the general purpose registers (there are others used for special purposes).
registers, but the USR function does ... machine code, yes, the registers can be used as counters ...What should your speccy have come with ?:) I was thinking about this earlier. What changes should of been made to the Speccy when you purchased yours ? Realistically this topic really…
... zx81 because their design required special features of the z80 to ... of the same 8-bit registers A through L and 16 ...z80 Helper?When you are programming with z80 do you get 'lost' you are in the middle of making a routine and you can't remember which registers are holding val…
... use the alternative set of registers to store data temporarily (using ... which set of registers is currently in use, paying special attention to ...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…
... CPC Firmware reserves the alternate registers for the OS, which is ... going to want all those registers for there own usage, ... a different matter if the registers automatically switched on interrupt (along ... AF/AF' which is already "special" due to the Flags). It ...New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…
v1 is now ready, hopefully no bugs but let me know if you find any. You can download it from my website [url="http://tomdalby.com/speccy/Z80onDSK.zip"]tomdalby.com/speccy/Z80onDSK.zip[/url]
[code]
Z80onDSK v1.0 (c) 2019 Tom Dalby
Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…
... it can become '64x48' on special occasions depending on what you ... seems counter-intuitive to PUSH registers to the video ram as ...What to write / programme?I've been trying to get back some motivation to write something in machine code for the Spectrum. I don't feel I am organised enough to write somethi…
... limited to internal Z80[i]registers[/i] which you could think ... , DE, HL. AF is a special register pair. The Accumulor normally ...Little problem with AYmakeWell, I'm not sure if this post may be here, but, if I'm wrong, I'm sorry. I have a little problem using aymake. I want to convert a 48k's song, w…
... know the values of the registers. I know them, but I ... , suppose there were only three registers (to make the example shorter ...How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…
... ,didnt understand all this about registers and memory addresses,and i ...HELP ME!!!!! How to load format TRDOS? I need a special program? I have ZX32 emulator, but does not load format TRDOS. Please help me!
I need a special program?
I have ZX32 emulator, but does not load format TRDOS.
Please help me!Little problem with AYmakeI have a little problem using aymake. I want to convert a 48k's song, which needs to know the values of the registers. I know them, but I don't know…
... know the values of the registers. I know them, but I ... , suppose there were only three registers (to make the example shorter ...Prices of old games/consolesHas any1 seen the latest issue of Edge magazine with the list of old games/consoles/computers and their prices? A boxed Speccy seemed pretty reasona…
... with the 1986 Crash Christmas Special? I'm sure my copies ...Certain Games Wanted - Very Good Prices PaidHi I have been after a few games now for ages and have turned to this forum as the last resort, can you help? I will pay ?5.00 for each of the follo…
... /> Wolfman - CRL
Tau Ceti Special Edition - CRL
Dr. Jekyll ...Internet enabled SpectrumHi, I'm sure this isn't new but I plan to make an Internet-enabled Speccy capable of serving up pages using a TCP/IP hardware stack (I just did this…
... microcontroller but there is something special about doing it with a ...Selling the cuboard collection of games/ collection.What do people do with all their old Speccy games and hardware that are in excellent condition. Throughout the country (and some of Europe) people ha…
... think to their work. Like Special FX's Firefly... preserved for ...
