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ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... make use of the IY register and Basic's interrupt service routine ... />
}
if (in_Inkey() == 'r') {
sp1_MoveSprAbs(pacman, & ... sequence.
If the 'r' key is pressed the pacman ... -
ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…
... in 128kB mode)
;correct register R value for all snapshots
;correct register R value for all snapshots
basic ".snapload" without param. -
Another Z80 processor questionOK, this time this isn't clearly covered in the FAQ, as far as I can see.... Suppose we have the CB instruction "SET b,r" (b=bit, r=register (differ…
... CB instruction "SET b,r" (b=bit, r=register (different from (hl)))... If ... the result to the initial register r.
My question is ... -
Lerm MicroMate - SDPHi All, I'm having a go at preserving a microdrive version of Lerm MicroMate. I?ve got a few problems, though, as the software has been unbelievably…
... tape. The main menu program ?r? is (obviously) on the cartridge ...
According to MaxDesktop the ?r? BASIC program is 40k! I can ... ?t MERGE ?r? from microdrive as it auto ... I use MaxDesktop to run "r" the message "LERM Micromagic" appears ... -
Exact emulation of the Snow effectAs the original post on another forum is outdated, and for those who don't know about that forum, I duplicate this info here: At the beginning of …
... 6..0 of the register R are picked up in ... machines snow appears if register I contains a value ... the bits 6..0 of register R (it should already be ... with a question of register R's participation in the ... it in addresses $8000… $BFFF (register I within $80… $BF) — ... -
Another Z80 processor questionOK, this time this isn't clearly covered in the FAQ, as far as I can see.... Suppose we have the CB instruction "SET b,r" (b=bit, r=register (differ…
... CB instruction "SET b,r" (b=bit, r=register (different from (hl)))... If ... the result to the initial register r.
[/quote]
It ... 's only copied to the register also if you use one ... here is in the Flags register. -
I need ASM for random numberI need to generate a random pair of coardinates in asm so that x=random no between 0 and 31, y=random no between 0 and 23. Any ideas on how to code …
... uses reading ROM or reading register R (or combination)
[code]
ld a, r
xor (hl)
ld ... -
How do I get a random numberHi, I need a simple routine to get a random number from 1 to 4. I don't need nothing very complex or that much random, it just have to produce diffe…
[url="http://map.tni.nl/sources/external/z80bits.html"]http://map.tni.nl/sources/external/z80bits.html[/url]
or reading register R
or reading ROM -
How do I get a random numberHi, I need a simple routine to get a random number from 1 to 4. I don't need nothing very complex or that much random, it just have to produce diffe…
... />
[quote]
or reading register R
or reading ROM
I never saw R as a good source for ... -
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... , just as you would in Basic.
[code]
// ... . This includes the IY register. Unfortunately, Basic assumes it has a monopoly ... on the IY register. What ... has a C program got to do with the Basic ... -
A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…
... , from using ROM content or register R (don't forget it's ... -
z80 Startuphi everyone, does the z80 upon start up reset all registers (including A) to 0? Many thanks, Robin
Higher memory is not being accessed but you may be seeing memory refresh cycles which occur after every opcode fetch. That has the address IR (I register, R register) placed on the bus. -
Fastest way to mirror a byte?I.E. turning 01100000 into 00000110, in assembly. I'm trying but I suck at stuff with rotation and the carry bit. Any pointers?
... r,(HL) Load register r with location (HL).
LD r,(IX+d) Load register r ... r,n Load register r with value n.
LD r,r' Load register r with register r'.
Zymosis -- WTFPL'ed Z80 Emulation Corebreaking news! i'm back with another useless project: new Z80 emulation core written in pure C! i hear you screaming: "oh, no! WHY?!" let me tell yo…
... each opcode if the I register is betwen 0x40 and 0x7F ... the video memory using the register R as an additional offset of ...ULA bug and snowI am tryng to improve the snow emulation in FBZX wii but I do not have a real spectrum to test the results. I used the information taken from Harele…
... in the floating bus. If register I is between 0x40 and ... display):
1) The R register value in case of first ... previous reading which is the register R in the case of the ...ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…
esxDOS v0.8.5 released (with TR-DOS emulator)Yup, you read right! Now with TR-DOS emulation! More info and download here: [url]http://www.esxdos.org/[/url] Enjoy :)
... routines are bugfixed by me. Register R is also correct user can ...Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…
Agreed that it can't be OUT.
Could bit 7 of register 'R' be detected?
Sometimes you find LS158 instead of 157Random object placementI'm looking for some advice on placing objects randomly in a game. I have a routine that reads a table and prints the corresponding object: 0 prints…
... can also combine it with register R as follows:
[CODE ... /> xor h ; combine FRAMES and register R
ld h,a
The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…
[b][u]The I register pointing to $40–$7f causes ... . The contents of the refresh register (R) are placed on address lines ... the contents of the interrupt register (I) is put on address ...Run BASIC program by R. USR xxxxxGuys, please help. Suppose I have BASIC program in my Spectrum 48K starting with line 10. I'd like to start it by RANDOMIZE USR xxxxx. Which paramete…
... , please help. Suppose I have BASIC program in my Spectrum 48K ... xxxxx address that would start BASIC interpreter to process my program ...R Register, Contended RAM and ClonesHi. I've had a quick look at the CSS FAQ but didn't spot quite what I'm looking for (also the CSS FAQ doesn't have much detail of the clones - there …
... the progress of the R register. At one point I ... between the reads of R is pretty much static ... contended RAM on the R-register? I do not run ... no effect as the R-register is internal to the ... , Scorpion, ...) affect the R-register differently? Again I would guess ...The R RegisterI've found some documentation regarding the R register (in that it is updated every M cycle except for a certain number of opcodes in which it is upd…
... found some documentation regarding the R register (in that it is updated ... the maximum value of the R register is +127? If so, do ...AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…
... the above mentioned operations from BASIC. Syntax is explained in ... it only changes the Flags register so I couldn't ... OR=O, BIT=B, RES=R, SET=S
... /> defb "A","X","O","B","R","S"
OPCODES ... 9;b,"=";USR 40021+VAL "R,a,b"
51 ...Canny use of the 'r' register?Seeing Sokurah's code in the [URL="http://www.worldofspectrum.org/forums/showthread.php?p=583188#post583188"]crunch sound thread[/URL] has made me th…
... made me think about the r register.
I've used ... eg:
ld a,r
cp n
jp ... any crafty uses for the r register?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…
... do the other three basic arithmetical operations as well ... br /> 3 DEF FN R(r$)=RR: DEF FN p(a ... TO 4-LEN STR$ r)+STR$ r
10 GO ... br /> 810 REM initialise FN R(r$)
814 RESTORE 3: LET ... SWDE
993 REM NEEDS REGISTER A, CHANGES FLAGS
994 ...R registerI'm cross-posting this as a spin-off of a [url="http://www.worldofspectrum.org/forums/discussion/52748/zx-spectrum-cartridges/p2"]thread in "Hardware…
... support & correctness of the R register behaviour.
... br /> [quote]Memory Refresh (R) Register.
The Z80 ... /> NOTE: Reset also sets R register to zero, hence also changes ... instruction fetch. Hence R register can be considered a ...Is there a way to suppress error R Tape Loading Error in Basic when trying to load only part of fileHi, is there a way to suppress error R Tape Loading Error in Basic when trying to load only part of file. E.g.: I have a Tape-Code-File Start f…
... to suppress error R Tape Loading Error in Basic when trying to ... I try this, I get "R Tape Loading error, 0:1 ... there a way in Spectrum BASIC (even with a POKE) to ...ANN: Spectaculator 5.1Spectaculator is a Sinclair ZX Spectrum emulator for PCs running Windows 95, 98, ME, NT 4, 2000 and XP. Spectaculator emulates the 16K/48K/128K/+2/+…
... LLIST or LPRINT from 128 BASIC straight
to a real ... LLIST or LPRINT from +3 BASIC straight to
a real ...
