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Schools shut due to snowGoing to be finding out in a bit if my two older daughter's schools are closed due to the snow... but WTF?? My school remained open in 1987/8 when w…
Going to be finding out in a bit if my two older daughter's schools are closed due to the snow...
but WTF?? My school remained open in 1987/8 when we had worse snow and I went to the ten miles to get there every day.. -
A clever method of using a single 8-bit register to be used for two things at a timeI don't know if this is the way the SAVE routine in the Spectrum works. Anyway, this is what I've learned today. I've been commented the disassembly…
... : I didn't found a register that holds 8, and in ... is: a single 8-bit register (L) holds both the byte ... left to transfer, the L register is not 0.
So ... -
Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…
... . If hardware scroll is supported, use smoth scroll (1 pixel scroll). In this ... supported, use 2 pixel step scroll. Also this code need more ... />
My idea for hardware scroll is simple. Store in a ... -
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…
... me think about the r register.
I've used ... crafty uses for the r register? -
ISR's in lower ram, a.k.a. the snow effect - did any game or demo ever use this?Hi all I've been curious to see what the 'snow effect' looked like in real life for a while now so today I wrote a quick IM 2 ISR in lower ram to wi…
... curious to see what the 'snow effect' looked like in real ... ="http://homepage.ntlworld.com/cmonkey/snow.jpg"]Snow[/URL]
[URL="http ... /matrix.jpg"]Green on black snow[/URL]
[URL="http ... -
ULA snowHow is this feature implemented in emulators ? And how exact is the emulation ? I somehow supposed that ULA snow is something that is not very determ…
How is this feature implemented in emulators ? And how exact is the emulation ?
I somehow supposed that ULA snow is something that is not very deterministic in nature. But if one can emulate it (perfectly ?) then i was wrong. -
Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…
... of the available routines to scroll the entire screen in any ... that would allow me to scroll a specified column (1 x ... -
emulators which support H/V scroll bars?You know, for years I've been using Fuse with a pokey little 4" window and moaning about it because the resize arrows didn't (appear to) work, then I…
... of it and a vertical scroll bar appears at the right ... -
multi-scroll m/c subroutine for BASICArising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. whe…
Arising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. where width is -
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] -
Author of The Hobbit featured on The RegisterSpotted another ZX Spectrum-related on The Register today: an article featuring the personal history of Veronika Megler (yes, a woman), one of the pr…
... ZX Spectrum-related on The Register today: an article featuring the ... -
"The Register" logo.What do those walking legs in the "The Register" logo represent? Is there a story behind them and why is it missing the rest of the body? Where is …
What do those walking legs in the "The Register" logo represent? Is there a story behind them and why is it missing the rest of the body? Where is it walking to?
[img]http://www.theregister.co.uk/Design/graphics/std/logo_414_80.png[/img] -
IX register - using/problemsAre there any rules on using the IX register? Are there any restrictions on the memory locations that it can access? Yes, I know it's slower than us…
... rules on using the IX register? Are there any restrictions on ... -
ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
... /floatingbus.html"]when the I register falls in the range 0x40 ...
A7-A0 = the R register of the Z80
FZX ScrollI wrote a routine to scroll message in ZX Spectrum screen, using [URL="http://www.worldofspectrum.org/forums/showthread.php?t=44088"]FZX[/URL] fonts.…
I wrote a routine to scroll message in ZX Spectrum screen, ... . Feel free to use FZX Scroll.
The [URL="http ...Help for beginner with z80Hi chaps, I'm reasonably new with z80, but had a fair amount of experience with 68000, so decided to give a few things a go. One little thing I'm t…
... .
I'll then scroll the top 8 lines of ... can't pass in a register to the BIT commend, e ...[NEW] Retro Virtual Machine v1.0.0 for OSX released!!!!Here it is! Retro Virtual Machine v1.0.0 RELEASED!!!! Many thanks first to Patrik Rak for the PZX format and for their Z80 tests without which RVM…
... Z80 emulation, including the ‘memptr’ register and the hidden flag ‘q ... test i have found.
‘Snow bug’ emulated in the affected ...The I register and IM 1Hi al! I've been doing some coding, replacing the BASIC ROM with my own code and upon examination of a few 16Kb cartridges, all the ones I've look…
... to say about the I register, apart from its use in ...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…
... & correctness of the R register behaviour.
From ... br /> [quote]Memory Refresh (R) Register.
The Z80 ... of this 8-bit register are automatically incremented after ... instruction fetch. Hence R register can be considered a simple ..."Limbo" free on steam 21 / 22 June http://www.pcgamer.com/the-creepy-platformer-limbo-is-free-for-a-day-on-steam/ just logged into steam, saw it come up when you go store.. and yo…
http://www.pcgamer.com/the-creepy-platformer-limbo-is-free-for-a-day-on-steam/
just logged into steam, saw it come up when you go store.. and you'll scroll down to see "install game" and it'll register it to ya account once thats donePrint (to screen) avalue held in a register pairHi guys, looking for a routine that will print any value from 0 to 65535 to the current position on the screen. I once heard that there was a PRIN…
... a value held in theBC register pair, to the current screen ...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]—[b ... ]Y—[b]I[/b]ndex register [b]X[/b]/[b]Y ... /> Then come the good-old register pairs:
[b]SP ...im looking for a horizontal scroll routinehi, im looking for a horizontal scroll routine. i read somewhere that you can do it with at 'to' statement, somewhere in a print routine. althoug…
... /> im looking for a horizontal scroll routine. i read somewhere that ...New Windows Spectrum Emulator: CSpect V0.2 ZXSpectrum emulator by Mike DaillyNew Windows Spectrum Emulator: CSpect V0.2 ZXSpectrum emulator by Mike Dailly (Found on SpecNext Facebook-Page) Info and Download (=klick "CSpe…
... bc, $243B ; select the X scroll register
ld a,22
scroll register
ld a,23
Register $20 ; Layer 2 transparency color ...ZEsarUX-7.1 BETAHi I have uploaded a new ZEsarUX 7.1 BETA version here: https://github.com/chernandezba/zesarux/releases/tag/7.1-10082017 Changelog of this …
... more lines than 22, doing scroll
Added joystick action to ... expressions
* you can now scroll with mouse on windows with ... /> *readdir call was incrementing PC register when there was no more ...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…
...
Added setting --random-r-register to generate random value for ... more lines than 22, doing scroll
* now you can ... suffix %)
* you can now scroll with mouse on windows with ... *readdir call was incrementing PC register when there were no more ...ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…
... % less cpu
-added scroll x,y on ula layer ... /> -added tbblue register 69H: display control 1 register
-added ... br /> Improved Waveform: new scroll type
Improved file selector ... (soft reset = 0)" on register 0x68
-fixed turbosound and ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... space on the screen, a "scroll?" message appears that not only ...ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…
... which is a commonly used register to load memory contents), ... general principal
; Scroll left
; much ... to see the difference
scroll rl (hl) ; incredibly useful ... - we can 'scroll' memory directly
dec hl ...Is spectaculator emulating the +2 correctly?i remembera few games that would crash when running in 128K mode, due to a bug in the hardware of the grey +2, hence it being replaced with the +2a. …
The 'snow bug' in the ULA is ... activated by setting the I register below 0x80 and above 0x3f ... whether or not the I register is in that range with ...
