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TASM, Z80 and Spec emusHi! Having some novice questions here regarding TASM and writing machine code for the Speccy emus... Now I have configured TASM into my EditPlus and…
... />
; Testfil
LD HL,16384
LD (HL),255
INC ... HL
LD (HL),128
INC HL ...
LD (HL),255
INC HL ...
LD (HL),128
INC HL ... -
Inherited stuffI've recently inherited some Spectrum stuff (see list below), and I am now asking if anyone could estimate what it is worth and where I should sell i…
... O. Lervik (ISBN: 82-90489-00-5) (Norwegian)
EDB Data ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... />
* If a LD A,I or LD A,R (which copy ... -
Mysterious bit of codeHi everyone, I found the follow piece of code in a game and was wondering what it does. ld bc,40ffh ld e,40h loop ld a,r …
... does.
ld bc,40ffh
ld e,40h
loop ... ld a,r
in ... -
Pixel setting / general speccy codingi just started doing some cross-coding with the [url="http://www.bigfatpanda.fsnet.co.uk/z80.html"]Z80 SNA assembler[/url] and an emulator, and this …
... xorpixel:
ld b, 0
ld d, 0
ld hl, lineptrs ... /> add hl, de
ld e, (hl)
inc hl ...
ld d, (hl)
ex de ... de, hl
ld hl, pixelmsk
ld a, c
... hl)
xor b
ld (hl), a
ret
need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …
... /> LD L,A
LD E,A
LD A,(DE)
LD C ... /> LD E,A
LD L,A
LD A,(DE)
LD B ...Calculate screenaddressWho knows where the topic about the fastest screenaddressroutine is? I can't find it in a search.. The fastest routine was to load a large table of …
... />
[code]
LD H,250 ; Table 256 * 256 ... = 64000
LD L,C
LD A,(HL) ; first ... is X-dependent
LD L,B ; second ... /> INC H
LD H,(HL) ; Fetch Hi ... -byte
LD L,A
RET ; ...Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…
... ; MOVE RIGHT
right:
LD A,(IX+2) ; x graphic ... br />
LD E,72
LD D,0
LD A,(IX ... RET NZ
LD A,RECTTOP
LD B,A
RET ...In need of a Poke (ooer!)Back in my very basic Basic days, machine code was a scary thing. I think I advanced as far as 'LD HA' (or something!) before giving up. However, so…
... I advanced as far as 'LD HA' (or something!) before giving ...Rapscallion -- reloading a game from tape?Although Rapscallion (Albert Ball's second game) isn't very difficult to complete "properly" (in one go ? I don't even use snapshots), so as to get t…
... that on Z80 (version 4?00), Rapscallion won't recognise and ...100s of games for sale!Dear All In preparation for a move to Manchester, I wish to get rid of the following games as a job lot! The list below should be pretty accurate, …
... ) 50p, Graphix (Icon Software) ?3.00, Graphic Adventure Creator (Incentive Software ... /> Quartet (Activision) 3.00
Androids (Sunshine) 7.00
YS Magnificent ... Impossible (Silversoft) 4.00
Timegate (Quicksilva) 1.00
Meteor Storm ...A bug in Z80 V4.00Yes, from what I've heard, this emu has plenty of bugs (though I've never heard what they actually are), but this one is my contribution to the bug l…
Yes, from what I've heard, this emu has plenty of bugs (though I've never heard what they actually are), but this one is my contribution to the bug list. :)
In a DOS prompt, use the SUBST command to set up a virtual drive; e.g. I used:
[ ...Techy Z80 questions****** Question 1 ****** Take the instruction SET b, (HL). This is broken down (in machine cycles) as follows (according to Microprocessor Technolo…
SAVE *"b" formatIs there anywhere online which details SAVE *"b" format?? I don't know if I ever had an Interface 1 manual, and I certainly don't have one now.? Nor …
... document of the Z80 v4.00 documentation.
I have ...Smooth Screen Scrolling RoutineHi everyone, this is a follow up to the thread on smooth screen scrolling. As promised here is the code for the routine. It's pretty long and fairl…
... ROTATETILE
LD IX,33088
LD IY,33168
CALL ... ;Displacment from start addr.
LD (RDISPB+1),A ;tile graphic ... BLOCK
CLIPDISP LD C,0 ;Displacment for clipping ... addr.
LD BC,0
LD D,H
LD E,L ...OT: INKJET REFILLS..Is it me? Or has any body else have a hassle with re-filling Inkjet printers. My Epson C82 , now a few years old cost ?29.99 for the black cartridg…
... sell you one for ?15.00 + P&P already full ...The incredible shrinking screendumpIn this topic I stated that I would be impressed if the screendump could be smaller than 37 bytes. [url="http://www.worldofspectrum.org/forums/viewt…
... 40000
start ld c,255 ; C = x-coordinate ... next byte in table
ld e,(hl) ; Fetch 'last ... byte in table
prbyte ld a,(hl) ; Fetch byte ... Printing table and screen
ld a,255 ; Test last ...Zaf-forth to Z80 compiler Build 5This forth like complier is changing almost every day with new items been added. Here is a new Zaf-forth word add it the sptword.fth file - which is…
...
=zxcirclex
asm
ld a,(zxcirclex)
call 11560 ...
ld a,(zxcircley)
call 11560 ...
ld a,(zxcircler)
call 11560 ...Jack The Nipper 2 Masking ... HowI understand masking i.e. ld a,(de) ; Get Mask and (hl) inc de ld a,(de) ; Get graphic or (hl) But how on Jack the nipper did they get the main ch…
I understand masking
i.e.
ld a,(de) ; Get Mask
and (hl)
inc de
ld a,(de) ; Get graphic
or (hl)
But how on Jack the nipper did they get the main character to go Behind the scenery?SPIN - debugger / fill memory / how ?I try to fill the screen with 00 value, but I don't get the expected result. - pause the game - debugger - hex numbers - fill memory block - fill wi…
... to fill the screen with 00 value, but I don't ... memory block
- fill with 00
- main memory
- start ...i know theres a list ..but wanna your opinionbest games...,give me your top10 ,please... theres a lot of good games that i don?t remember the names ...so this could help. thanks. [ This Messa…
best games...,give me your top10 ,please...
theres a lot of good games that i don?t remember the names ...so this could help.
thanks.
[ This Message was edited by: untitled on 2004-10-12 00:25 ]Star Tip 2 - Tim Follin's 3 Channel Sound - info reqd.Hello there, I've decided to throw myself in at the deep end and decipher Tim Follin's "Star Tip 2", which produced some incredible 3 channel sound …
spectrum scenewhen i got my first computer,spectrum, this machine was the most popular at that time, 80?s, maybe cus was the most cheap, just one boy had c64 in…
... spectrum scene in this days, 00?s, is more active than ...
