-
IDE interface emulation request (yet another one) Simple, 8-bit IDE interface emulation for interface described here: [url="http://piters.tripod.com/zx.htm"]http://piters.tripod.com/zx.htm[/url] …
... 48/128 compatible).
Data register : #2B
Parameter reg.: # ...
Sector count r.: #6B
Start sector r.: #6F
... used. I mean, multiple sector R/W after commands #20 & ... with IDE standard, and Read/Write routines in ROM can be ... -
Madness or inaccurate docs: RR r/RL r?According to the Z80 User's Manual, the instruction RR r/RL r should rotate the carry flag into bit 0 or bit 7 of the register in question (bit 0 or …
... Manual, the instruction RR r/RL r should rotate the carry flag ... or bit 7 of the register in question (bit 0 or ... -
Contention: LDI vs LD (ss), rAccording c.s.s. FAQ: instruction LD (ss),r breakdowns as pc:4,[b]ss:3[/b] and LDI as pc:4,pc+1:4,hl:3,[b]de:3,de:1 x 2[/b] can anyone explain why …
... :
instruction LD (ss),r breakdowns as pc:4,[b ... />
can anyone explain why WRITE operation in LDI introduces two ... -
[MOD] R-Type IIII suppose it makes sense now to register [URL="http://www.worldofspectrum.org/forums/showpost.php?p=401659&postcount=15"]R-Type III[/URL] back in the…
I suppose it makes sense now to register [URL="http://www.worldofspectrum.org/forums/showpost.php?p=401659&postcount=15"]R-Type III[/URL] back in the archive as a mod... -
Using R as a loop counterThis is just something silly I've found a while back. xD [b][How-to][/b] Setup your routine like this:[code] ld a,X ;see below ld r,a loop ;your …
... ,X ;see below
ld r,a
loop
; ... from the final 'ld a,r: jr nz,loop' commands) ... br /> and #7F
ld r,a
.l2
nop ... /> inc b
ld a,r
jr nz,.l2
register, yay!
So ... -
SpecBAS article in The Register todayDunny's SpecBAS (for the Raspberry Pi) got a write-up in The Register today: [url]http://www.theregister.co.uk/2012/11/13/sinclair_basic_for_raspber…
Dunny's SpecBAS (for the Raspberry Pi) got a write-up in The Register today:
[url]http://www.theregister.co.uk/2012/11/13/sinclair_basic_for_raspberry_pi/[/url] -
R.I.P. Mr. R.A. Montgomery[url]http://www.cyoa.com/pages/r-a-montgomery-1936-2014[/url] [quote]Raymond Almiran Montgomery, original publisher and author of the incredibly pop…
... ]http://www.cyoa.com/pages/r-a-montgomery-1936-2014[/url ... as well, and tried to write my own gamebooks because of ... -
The HL Register Pair Naming. An Observation.This isn’t really a question or a tip. Just an observation about the naming convention of the registers in the Z80 CPU. It seems that every register …
... CPU. It seems that every register other than the HL pair ... [/b]—[b]F[/b]lag register
[b]I[/b]—[ ... vector
[b]R[/b]—Memory [b]R[/b]efresh
register [b]X[/b]/[b]Y ... /> Then come the good-old register pairs:
[b]SP ... -
ZEsarUX-7.1Hi! There’s a new stable version of ZEsarUX, version 7.1! The next 24th of September it will be 5 years old :) So this is a special anniversary…
... setting --random-r-register to generate random value for R register on every ... . Useful to avoid same R register in the start of games ...
* now you can write any ascii character on the ...
*fixed mode OPEN_CREAT|WRITE which has appending data after ... -
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…
... Speccy screen. Anything u 'write' there will be displayed on ... (also known as the Accumulator) register.
HL is ...
If u r using an assembler, the assembler ... number in a 2 byte register. the assembler
; ... -
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…
... Speccy screen. Anything u 'write' there will be displayed on ... (also known as the Accumulator) register.
HL is ...
If u r using an assembler, the assembler ... number in a 2 byte register. the assembler
; ... -
Anyone for a hacking challenge ?I have to get the DSK version of Tomahawk to work. It uses the well-known Digital Integration "SECURITY CODE" lock just like in Bobsled, ATF, etc. Th…
... and then back 2 lenslok write up :) That reminds me, I ... the Multiface and then press 'r' to return. Where Genie says ... do is use the A-Register (Accumulator) to control the 'lives ... choice!)
Now press R to (R)eturn to game. Start the ... -
+D/Disciple games archive?Hi all, Having finally got my disciple to work, I'm starting to have a look at hacking multiload games. Is there any archive on the web with games t…
... data block named "r-typeA.dat". The "r-type" part ... datablock number in the a register and ".dat" is appended ... modified game snapshot in "r-type.z80" and the ... loader is saved with 'SAVE "R-TYPE" LINE 1' -- ... you will need to write something equivalent for the ... -
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…
... has a monopoly on this register. The alternative to disabling ... fan graphics that sp1_PutTiles() will write to the background. sp1_PutTiles() ...
}
if (in_Inkey() == 'r') {
sp1_MoveSprAbs(pacman, & ... -
Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…
... it so that it can write into several different windows? ... whatever was in the BC register pair. To communicate parameters ... />
[code]
let r = USR 32768: REM move 3 ... ,100,20
let r = USR 32768, "move ... 3,100,20"
let r = USR 32768, "move", a ... -
k7zx, a utility to load programs to Spectrum at very high speedk7zx is a windows program that convert .tap, .tzx , .sna and .z80 files to a wav file that can be played to a real Spectrum. You can down load it f…
... very clever use of the R register to control timing but I ... that you chose to WRITE to the R register also. You are a ... -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
... you would just have to write your own code which emulated ... few undocummented Z80 features and R register, if I remember correctly, nothing ... -
Emulation vs SpecApologies if this is an old thread, what does anyone think is the best - playing spectrum games through emulation or on a real speccy? I feel it's b…
... instruction timings, deal with the R-register properly and assorted other niceties ... Z80 instructions which could possibly write to the screen .e.g ... -
A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…
... as Byte Count. When I write a routine that does something ... specific registers (without naming the register explicitly) - for example djnz uses ... example, OUT (C), r really does OUT (BC), r - since it puts ... -
z88dk - Plus 3 dos librariesdo they work? I looked in the cvs to try to piece together an idea of the syntax of the commands (the documentation is pretty sparse :-() and it loo…
... />
if (in = fopen("test", "r"))
{
fread(buf, 1 ... maybe a "write file" routine which will restore expected register values before ... -
Atic Atac speed.Dear all, Excuse the noob question, but does anyone know how fast Atic Atac runs at? What I mean is, frames per second, or the amount of pixels the…
... takes to draw the graphics (WRITE, XOR, with/without MASK etc ... bit of the R register? I thought the R register went up to 127 ... /> [QUOTE=Arjun;327444]The *what*??? R register?
*googles it*
Keyboard Input$/scan problemHi, I'm finally fulfilling my promise to get a reasonable understanding of the Speccy and embarking upon attempting a few simple routines in Assembl…
... 331074]so I decided to write the program exactly as above ... know is OUT (C), r, or IN r, (C) are really ... they are OUT (BC), r or IN r, (BC) - since the ... to be the value in register B.
So - ... assembler isn't accepting IN r, (C) because you are ...The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…
... Border port #FE is write only and is impossible ... effort to capture the R register, despite apparently not using ... of each page and write our own value there, ... lose your chance to write something at the original ... extreme case you could write out the 48K image ...Correct flag response to BIT n,(HL) etc.When running the test program suggested by Arjun (thanks again), all intructions are passing the flag tests except the BIT n,(HL), BIT n,(IX+dis) and…
... , have you implemented the internal register mentioned in Sean Young's ... bit additions, JR and LD r,(IX+d)?.[/QUOTE]
write a more detailed article about ...Help! Reverse engineering a Spectrum game[deleted]
... guy who would like to write his first game I would ... debug screen that displays the register values and various other information ... /> [B]Useful although LD A,R for your 1st game may ...Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... functions. I still have to R&D the upload function ... the Spectrum:
zx232 /r 0
This will ... NON-CONTENDED RAM*
; *CORRUPTS REGISTER 7 OF AY-3-8912 ...
ld (hl),a ; Write BYTE
inc hl
Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... />
imul ecx,ebx ; R+B*A = RRxxBBxx
mul ... />
imul edx,ebx ; R+B*A = RRxxBBxx
mul ... />
.opti_solid: mov [edi],ecx ; Write destination
.opti_trans: add edi ... be coded using a low register count. I have also pipelined ...Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…
... use structures using index register IX as I feel ... br /> scr ld (hl),d ; Write 0 to screen
inc ... ld d,7 ; Value to write to attributes
... atr ld (hl),d ; Write 7 to attributes
inc ... A
; 251 T R E W Q
; ...
