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ZERO Emulator - BugsI have been using Zero emulator to experiment a few routines in assembly, since it has a somewhat usable debugger. However I believe I found a few b…
... Z80 behaviour, DEC BC and all other double register INCs/DECs don ... "condition" is a 16 bit register, like BC for example.
[/quote ... new users, BC isn't a 'real' 16-bit register, its two ... an individual breakpoint for each register or a conditional one based ... -
ZERO Emulator - BugsI have been using Zero emulator to experiment a few routines in assembly, since it has a somewhat usable debugger. However I believe I found a few b…
... Z80 behaviour, DEC BC and all other double register INCs/DECs don ... "condition" is a 16 bit register, like BC for example.
[/quote ... new users, BC isn't a 'real' 16-bit register, its two ... an individual breakpoint for each register or a conditional one based ... -
ZERO Emulator - BugsI have been using Zero emulator to experiment a few routines in assembly, since it has a somewhat usable debugger. However I believe I found a few b…
... new users, BC isn't a 'real' 16-bit register, its two ... an individual breakpoint for each register or a conditional one based ... debugger on let's say BC=30000.
That's ... a breakpoint like BC=1000, BC>HL or [BC]=[HL] (comparing cell ... -
ZERO Emulator - BugsI have been using Zero emulator to experiment a few routines in assembly, since it has a somewhat usable debugger. However I believe I found a few b…
... (changing LD BC, 6144 to LD BC,16 helps a ... that instruction [0b] DEC BC, is incompletely implemented, since ... not set (1), when BC reaches zero (0), so ... behaviour, DEC BC and all other double register INCs/DECs ... similar use to "DEC BC", and actually detect a ... -
ZERO Emulator - BugsI have been using Zero emulator to experiment a few routines in assembly, since it has a somewhat usable debugger. However I believe I found a few b…
... breakpoint for a condition like BC = 30000. You need to enter ... the emulator will break when BC = 30000. I take it the ... value changes, in memory or register. -
Execution map file support in different emulatorsAs I'm now seeking about execution map files, the different emulators support, I want to start a new discussion here. Today, I tried to create a mem…
... /> PC = 0048 tstate = 00104 PUSH BC
PC = 0049 tstate = 00115 ... /> PC = 0293 tstate = 00177 LD BC,#FEFE
[/code]
register you wanted to track. -
Execution map file support in different emulatorsAs I'm now seeking about execution map files, the different emulators support, I want to start a new discussion here. Today, I tried to create a mem…
... PC = 0048 tstate = 00104 PUSH BC
PC = 0049 tstate = 00115 ... PC = 0293 tstate = 00177 LD BC,#FEFE
[/code]
register you wanted to track.
register does not affect my import ... -
Execution map file support in different emulatorsAs I'm now seeking about execution map files, the different emulators support, I want to start a new discussion here. Today, I tried to create a mem…
... endmacro
setpos 24000 ; USR call address
ld hl ... screen into screen
ld bc,6912 ; memory.
ldir ... -
New SpecEmu<span style="font-family: Arial, Verdana; font-size: 10pt; line-height: normal;">Finally a small update available </span><a href="http://homepage.ntl…
... as it's an x86 register, so using "_SP" :p
_SP WORD ?
BC z80regpair
DE z80regpair
40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... first read char bits to register and align them to byte ... ; scan line 6
ld bc,#BYTSROW ; bytes to transfer
push af
push bc
push de
push ... /> ex de,hl
pop bc
pop af
dec ...Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…
... boundary, and decrement a single register only. Thus subtracting 2 from ... :
[code]
ld bc,26*256+26*18 ; repeat ... times, plus compensate LDD decrementing BC
loop:
REPT 18 ...Games not compatible with the 128+ & grey +2Like the +2A & +3 thread, there are a few games that do not work correctly on the original 128+ and the grey +2. Two games that I know of that wil…
... machine (toast-rack) is in USR 0 mode
ld bc,15 ; otherwise must be ... now
add hl,bc ; otherwise add another 10 ... 01),de ;
ld bc,epokes-pokes ; length
... ld de,$a341
; ld bc,$0040 ; 64 instructions to copy ...Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... . So the simple command PRINT USR 8 will show the ROM ... up in a 16 bit register. A 'start value' (programmed in ...WANTED Machinecode Routine for Paging in Betadisk TR-DOS v5 ROMI try to build a small MCode-program which writes the TR-DOS-ROM v4 / v5 to RAM adress 40000 an up. It´s working on TR-DOS v4 / Betadisk 48k: C…
... as soon as the PC register is pointing at RAM (16384 ... /> LD DE,40000
LD BC,16384
RET
BC, then CALL $3D2D, then $2FF0 ...Vega ARM SOC?I read that the core of the new Vega was an ARM SOC. I thought it would have been an FPGA. But it seems it's an ARM running an emulator. Anyone kn…
... time using the ULAplus palette register to change the color or ... /> ld de,22529
ld bc,767
ld (hl),a ...Flood FillHi Folks, Can anyone point me to a flood fill that I can call from ZX BASIC? I have looked through the archive and although there are posts about…
... de,pattern
ld bc,300 ; allow use of ... de = void *pattern
; bc = allowed stack depth
< ...
ld bc,0
ret nc ; ... middle pixel with a RAND USR 32768
z88dk v1.99A Release Candidate[b]Z88DK VERSION 1.99A RELEASE CANDIDATE[/b] Download from: http://nightly.z88dk.org/Releases/ The release candidate will be available for te…
... they pop into a register, that register is changed by the ... ld h,(hl)
push bc
ld l, e< ... call _strlen_fastcall
pop bc
add hl,bc
[/code]
ld bc,_keywords
add hl,bc
ld ...Calling machine codeOccasionally I see on ZX computers (mostly the spectrum, but I think also the '80 and '81), how someone made their machine code and wrote the bytes i…
... return value of USR X is the contents of BC at the ... you execute 'LD BC,1234: RET' using a PRINT USR statement, it ... effects from using it with USR in BASIC. As for using ... 'USR X' by itself without a ...Calling machine codeOccasionally I see on ZX computers (mostly the spectrum, but I think also the '80 and '81), how someone made their machine code and wrote the bytes i…
RANDOMIZE USR xxxx is popular because it ... .
BTW the Z80 register that is used to return ...New game: SETO TAISHO VS YOKAIHello Spec-chums! At last, my new game is available for download: [img]http://www.alessandrogrussu.it/zx/Seto-art.jpg[/img] [b]Features:[/b]…
... use this code:
LD BC,#001F (3 bytes)
IN ... and test other bits of register E for next functions (D5 ... = log.1 then D5 of register E = log.1 then game ...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…
... version by me.
BC's Quest For Tires: Locks ... (fixed_usr0).zip"]this[/URL] automatic USR 0 mode version by Velesoft ...New game: SETO TAISHO VS YOKAIHello Spec-chums! At last, my new game is available for download: [img]http://www.alessandrogrussu.it/zx/Seto-art.jpg[/img] [b]Features:[/b]…
... without modification save to register E.
LD BC,#001F
IN ... then SET bit 5 of register E. After test all keys ... and set all bits of register E game test bits of ... register E but here can be ...New game: SETO TAISHO VS YOKAIHello Spec-chums! At last, my new game is available for download: [img]http://www.alessandrogrussu.it/zx/Seto-art.jpg[/img] [b]Features:[/b]…
... without modification save to register E.
LD BC,#001F
IN ... then SET bit 5 of register E. After test all keys ... and set all bits of register E game test bits of ... register E but here can be ...Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
...
909 LET bc=USR (65536-300+14): ... 999 OVER 1: LET bc=USR 65354: OVER 0: RETURN ... de,X0_Y0
ld bc,4
ldir ; ... br /> pop bc ;BC=unplotted pixels #
push bc
...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…
... br /> ; return value by register DEHL
... ; char *buffer
pop bc ; radix
push af ... : hl = uint num
; bc = int radix [2,36]
; hl = unsigned int
; bc = radix
; ix = char *buf ...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…
... , and -in combination with A register- even some arithmetic.
start:
ld bc,$0507
push bc
call addfunc
What am I doing wrong here?[code]IF INKEY$=SCREEN$ (21,4) THEN LET SCORE=SCORE+1[/code] It's delivering a positive every time.
... FN s$(r,c)=STR$ USR ScrDol1
; ... FN ... 2d2b (discard)
pop bc ;BC=$3365
pop de ; ... /> push de
push bc
ld de,(23653) ... s$(r,c)=STR$ USR 23296
9 LET ...
