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Storing two 4 bit values in one byteHi Folks, Another little tip to share although I suspect this one will be known to a lot of you out there. ;-) I wanted the ability to store two 4 …
... ability to store two 4 bit numbers (values 0-15) in ... -
Whats the oldest bit of electronic technology you own?Whats the oldest bit of electronic technology you own? For me it is probably my two atari 2600 woodies, not that old on the grand scheme of things t…
Whats the oldest bit of electronic technology you own?< ... -
Character Printing routines - 27/32 lines?There are lots of extra character-per-line routines out there for 42,51,64 even 85 characters. Are there any that do 7/6 pixel rows - and do 27 or 3…
... rows - and do 27 or 32 lines, as well as higher ... -
What is the oldest bit of machinery in regular use in your workplace?What's the oldest bit of machinery anyone has ever used regularly in the work place? Where I am now, very old building, mostly modern stuff. Previ…
What's the oldest bit of machinery anyone has ever ... .
Previously the oldest bit of kit that was used ... -
A fast DRAW routineI was investigating how to speed up the line drawing for the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=20225"]BASIC compiler[/URL]…
... ld c, a
bit 2, a ; Test for ... ; or (hl)
bit 1, c ; Test for OVER ... de ; error -= dX
bit 7, h ;
exx ; ... ld a, l
sub 32
ld l, a< ... l
add a, 32
ld l, a< ... -
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…
... for a '1' bit or '0' bit within the byte that ... instruction that supposely shifts each bit in a byte so ... answer is: a single 8-bit register (L) holds both ... just before entering the "transfer bit" loop, the carry is ... know the value of the bit that is about to ... -
Iphone/Ipod touch gaming threadThought i would start a thread for this little gadget. I havent been this excited since the Speccy years. Never was keen on an Iphone, dont want a …
... /> I went for the 32 gig one at Amazon.co ... br />
Now the best bit ! The games....
Bit like Bounder), Pinball Dreams, ... Man II, GOF 2 (Bit like Elite), Reckless Racing ( ... apps yet) then a 32 gig ipod touch for ... -
Converting a decimal number to binary...Hi Folks, Been thinking about ways to convert a decimal number to 8 bit binary and came up with the following: [CODE]100 REM ----------------------…
... a decimal number to 8 bit binary and came up with ... )= 64:
LET b(3)= 32:
LET b(4)= 16 ... -
Rendering techniques in emulatorsI've been giving thought to the possibility of speeding up the rendering in Zero considering I've been putting it off long enough. My approach is c…
... of speeding things up a bit without having to resort to ... rendering model:
Backbuffer is 32 bpp. I suppose I could ... a LUT for every conceivable bit combination for the same process ... -
Small Machine Code Routines Which Maybe UsefulAs part of creating Flynn's Adventure in Bombland I created a lot of little routines to do all sorts of things. A lot of these I created based on inp…
... *********************
and c ; 4t - create bit 7 x0000000
ld e ... and c ; 4t - create bit 6 0x000000
rra ; ... and c ; 4t - create bit 5 00x00000
rra ; ... and c ; 4t - create bit 4 000x0000
rra ; ... br /> add a,32 ; 7t - add 32 or one char ... -
Building an 8 bit computer (tenous Spectrum connection)[URL]http://www.bbc.co.uk/news/technology-13201254[/URL] Interesting little vid about building an 8 bit computer from a kit.
[URL]http://www.bbc.co.uk/news/technology-13201254[/URL]
Interesting little vid about building an 8 bit computer from a kit. -
Jet Set Willy Turbo edition!Improve the speed of the game with just a few pokes! Do the standard CLEAR 32767 : LOAD "" CODE to get at the BASIC loader (see Your Spectrum issue …
... +1,160: NEXT i
32 POKE 65472,61: POKE 65473 ... POKE 35323,62: POKE 35324,32: POKE 35325,205: POKE 35326 ... POKE 35265,62: POKE 35266,32: POKE 35267,205: POKE 35268 ... game now moves with a bit more speed! (It would be ... -
fast font engine possible?inspired by the recent "proportional font" thread for zx basic and ideas for gui and having done some of the work on this in the past i wonder if it …
... {
byte8 first_ascii; /* typically 32 */
byte8 last_ascii; /* typically ... this would enable fast 8-bit calculations for measure_font function. ... br />
byte 0: 32 … first ascii
byte ... 11 and 12: ascii 32 definition (standard raw ZX font ... -
Re: Best British comedy programme.A couple of days ago I was discussing comedy programs at work, and the subject came around to the BBC's national competition from three or four years…
... won it, which was a bit of a surprise, but what ... /> 31 The Young Ones
32 Till Death Us Do Part ... -
Your Sinclair magazines #29,32Hello, I'm looking for the following magazines: Your Sinclair #29 [url]http://www.ysrnry.co.uk/ys29.htm[/url] Your Sinclair #32 [url]http://www.ysrn…
... .htm[/url]
Your Sinclair #32 [url]http://www.ysrnry.co ... -
+3e DOS Error : Out of XDPBsHello there my fellow forum chummies, I have been having fun with multiple partitions under the +3e DOS, however I have a bit of a problem - I have…
... DOS, however I have a bit of a problem -
IDE Unit 0 (256/16/32)
PLUSIDEDOS 8K system
Kiwi OS for z80 computerHi everyone, Nearly made my z80 computer with 2K ROM 32K RAM. It has an OS im still writing called Kiwi (apple, blackberry, you get the idea ;D) he…
... CP $0A ;COMPARE TO SEE IF ... /> ;*********************************
;(START BIT)
;*********************************
START_BIT ... /> ;*********************************
;(STOP BIT)
;*********************************
STOP_BIT ...Someone with a bit of a thing about clone games:I don't know if anyone knows who this is, but it's a blog post on arcade game clones and the development of licensing over the 8-bit era. I came acr…
... of licensing over the 8-bit era. I came across it ...checking bits in BASICThe question of manipulating bit patterns in BASIC was raised recently in this [thread=35728]Keys redefine routine and key check[/thread] thread. I s…
The question of manipulating bit patterns in BASIC was raised ... contiguous so it was a bit trickier to sort out; I ... of displaying numbers up to 32 digits long in full on ... character strings in BASIC for bit manipulation, but the conversion routine ...Alphacom 32 Printer - Power supplyI've just received a Alphacom 32 Printer via ebay. However, its not the correct power supply, doesnt even connect to the printer. Just been stuck in …
... 've just received a Alphacom 32 Printer via ebay.
However ...a bit of coding helphi all over the past few weeks i have been busy getting to grips with recracking tr-dos stuff for the plus-d and was after a little bit of help what…
... and was after a little bit of help
what i ...What 80's games inspired the 8/16-bit sequence in Atlantis SquarePantis (the movie) ?So, I just caught a glimpse of SpongeBob SquarePants (the Atlantis SquarePantis movie with David Bowie, [B][I]NOT[/I] the game based on the movie[/B]…
Printer Rolls for TS2040 / Alphacom 32Someone on the TS2068 discussion list has a few boxes of rolls of printer paper for the TS2040 printer (48 rolls of paper I think). He only wants th…
... should also fit the Alphacom 32 printer
They are ...High Score Musical - an 8-bit rom comHello all, [b]High Score Musical[/b] is a project I'm currently working on, and we're planning to take it to Edinburgh this summer. It's a new (slig…
Compare a T/S 2068 to New ComputersApparently, [URL="http://gdgt.com/compare/desktops/10990+33192+69661+33191+71310/"]someone did just that[/URL]. Really like the part where they comp…
Apparently, [URL="http://gdgt.com/compare/desktops/10990+33192+69661+33191+71310/"]someone did just that[/URL]. Really like the part where they compare processor speeds.Code optimisation - can you help?Hi Folks, I have been looking at the following code fragment for days and I have been able to improve its performance quite a bit. However, it is a…
... improve its performance quite a bit. However, it is a time ... ),2 TO 5);
AT 32,l;v$(CODE i$(3 ... /> LET h=INT (CODE i$(32)/16):
LET m=CODE ... i$(32)-h*16:
LET a ...BIT/RES/SET b,r where b is variableWhat's the best way to use the bit flag group of commands if it's not known in advance which bit should be referenced; ie. where it's dependent upon …
... best way to use the bit flag group of commands if ... not known in advance which bit should be referenced; ie. where ... during the program? As the bit number has to be explicitly ... relevant byte which indicates the bit number before executing the command ...Difficult to find upper RAM fault.I've recently repaired an issue 3B 48K Spectrum that had a tricky to diagnose upper RAM fault, so I thought I'd post a report of what I found here. …
... or 2, but sometimes 32 or 34 (this was ... was always 34. The bit pattern for 34 is ... , apart from it having bit 5 set (see the ... br />
Given that bit 5 of all upper RAM ... and this was the bit that was always wrongly ... br /> It still seems a bit odd to me that I ...Optimize this: Distance CalculationBased on a taylor series expansion, suggested by NA_TH_AN, I've got this so far, which is far far faster than SQR(X^2+y^2) Formula is: in a right an…
... /> RL H ; Pull in carry bit IF necessary.
... get original
CP C ; compare with C
JR NC ... up being a 9 bit number to bounce around.< ... my head around the 9 bit code, though - so it ... up by making it 8 bit calculations doing clever carry ...
