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AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…
... offset in IX (+ or -) and adding this to the registers where an ... br /> push hl
pop ix ;IX=runtime displacement from LOCATE
push ix
pop de
add ... -
z88dk stdio fopenI'm trying to write a fcntl library, based on the p3.lib one. Looking at fopen(), it calls freopen_z88() which turns the mode string into mode and f…
... HL with other registers set up with parameters. IX will hold a ... letter A
call l_jpix ; ix is the fdstruct associated with ... />
l_jpix: jp (ix)
....
ix-> (points to ... -
Writing an emulator - how to / resourcesI'm looking for a holidays project, and I'm thinking I'd like to write a simple Spectrum emulator. I've googled plenty and read some resources, but …
... table that replace HL with IX or IY (1280 opcodes in ... complex, because it has more registers and opcodes, but a good ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... EXs to access the shadow registers, and do four more POPs ... copies your data into the registers. Then point the stack pointer ... . Or 20 if you use IX and IY too (they take ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... EXs to access the shadow registers, and do four more POPs ... copies your data into the registers. Then point the stack pointer ... . Or 20 if you use IX and IY too (they take ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... directly is that you need registers to track the destination screen ... addresses in draw code or (IX+n) type addressing. When that ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... directly is that you need registers to track the destination screen ... addresses in draw code or (IX+n) type addressing. When that ... -
Creating a new game - AssemblySo... finally I?m studying Assembly Z80... after 36 years. :) Well... it?s sooooooooooooo hard to make a game using Assembly? I bought a book (Spectr…
... t have to use the registers for these purposes throughout ... an art to juggling the registers, but there's no ... if you're short of registers, or reserve some memory ... warn people off the IX and IY registers. The chief objection ... to have extra address registers. -
Creating a new game - AssemblySo... finally I?m studying Assembly Z80... after 36 years. :) Well... it?s sooooooooooooo hard to make a game using Assembly? I bought a book (Spectr…
... /> I've always used the registers as..
HL = source ...
A = multiple things
IX = indexing
IY = rarely ever ... very rarely use the alternate registers either.
But essentially ... -
PLOT and DRAW in machine codeHow do you go about it? If I posted a really simple BASIC instruction could someone do a machine code routine so I could learn from it? I wouldnt k…
... how do you load the registers with 2 different values in ... some instructions allow 8-bit registers to be paired together to ... are AF, BC, DE, HL, IX, IY (and the exchange set ... -
z88dk sticky?I've just tried to PM Alcoholics Anonymous and couldn't because "Alcoholics Anonymous has exceeded their stored private messages quota and cannot acc…
... s function dispatcher, along with registers holding parameter values. It is ... inapplicable functions.
IX is reserved as FILE*/FD ... structure can be addressed using IX+n indexing and sending/ ... the caller is then 'pop ix; ret'
Regarding ... -
Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
...
push af ; save the registers
ld a, 0x3b ; high ... /> push af ; save all registers and the stack pointer
ld ix, attributes + 768 - 16 - (attr ... and all registers
pop iy
pop ix
... -
Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... but you must charge the registers and control another things.[/QUOTE ... . There are just enough registers to hold the data for ... br /> pop hl
pop ix
pop iy
ld ... br /> push iy
push ix
push hl
push ... -
Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... method. There are just enough registers to hold the data for ...
pop hl
pop ix
pop iy
ld ...
push iy
push ix
push hl
push ... -
Abbaye des morts[url]http://www.locomalito.com/juegos_abbaye_des_morts.php[/url] Looks like Spectrum, sounds like Spectrum, but it's not a Spectrum ('cause no colou…
... buffer
;Affected registers: AF, HL, DE, BC,IX
... c ;Temporary transfer BC to IX
ld b,(hl) ... inc de
dec ix ;Decrements IX (that is, decrement our ... -
Abbaye des morts[url]http://www.locomalito.com/juegos_abbaye_des_morts.php[/url] Looks like Spectrum, sounds like Spectrum, but it's not a Spectrum ('cause no colou…
... buffer
;Affected registers: AF, HL, DE, BC,IX
... c ;Temporary transfer BC to IX
ld b,(hl) ... inc de
dec ix ;Decrements IX (that is, decrement our ... -
Shadow registers.I assume it's faster to transfer the registers to the shadow registers rather than using the stack? Let's say that I want to temporarily preserve the…
... access to the data in registers you were working on, data ... can be done through AF, IX, or IY which are unaffected ... and more compact to use IX or IY as an extra ... register. You can split IX and IY into their 8 ... the 8-bit split of IX/IY is not undocumented in ... -
28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... either a NOP, EX, or IX/IY shift instruction - but that ... mean more pre-loading of registers.
So your game ... -
28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... we're restricted to 6 registers.[/QUOTE]
You're ... away. It's only 4 registers.
If you want ... to use PUSH IX and PUSH IY then ... ), loading the values into more registers takes time too.
... d suggest a system where IX/IY are only available ... -
28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... want to use PUSH IX and PUSH IY ... loading the values into more registers takes time too.
IX/IY are only available ... br /> Damn those sodding index registers I hate 'em.
... into the registers, just loading the registers before the ... -
28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... timing spaces for the IX and IY registers (6 colours is probably ... -
28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... timing spaces for the IX and IY registers (6 colours is probably ... -
Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …
...
push af ; save the registers
ld a, 0x3b ; high ... /> push af ; save all registers and the stack pointer
ld ix, attributes + 768 - 16 - (attr ... and all registers
pop iy
pop ix
... -
ISO-Copy - Individual Software revisitedHi folks In another thread about Supertape: [url]http://www.worldofspectrum.org/forums/showthread.php?t=36203[/url] ... we touched on ISO-Copy by th…
... IM 1
5CE0 PUSH IX
5CE2 LD BC, 5CE5 ... A ; Raw data loading needed registers setup
5CEA SCF
z88dk vs. sdccI've just read this article (in Spanish) [url]http://www.cpcmania.com/index2.asp?urldest=Docs/Programming/SDCC_vs_z88dk_Comparando_tama%F1o_y_velocid…
... not reserve too many registers, and it is not ... few things: they use IX as function pointer (standard ... />
sdcc reserves IX as frame pointer (it also ... time. Since sdcc reserves IX, the last pop ...
[code]
push ix ; maybe not done for __naked ...In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…
... is free to change regular registers BC,DE,HL,A. Can ... ', DE', etc? Can it change IX (perhaps it's automatically restored ...In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…
... is free to change regular registers BC,DE,HL,A. Can ... ', DE', etc? Can it change IX (perhaps it's automatically restored ...In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…
... AF, mainly I save registers on stack and restore them ...
;-----------------------------------------------------------
___AFTER_INVOKE: ; restore IX
POP DE ; the return ... PUSH HL
POP IX ; the old IX restored
...In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…
... the caller preserve only the registers it needs, thus the program ... -native methods doesn't preserve registers, right? If so, it doesn ... about POP instead of LD IX, there are two code block ... that the documentation is wrong: IX needs to be preserved, otherwise ...
