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Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…
... fail to set the zero flag, because it'll be decrementing ... -
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…
... have to set the carry flag before setting the registers. Now ... -
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…
... have to set the carry flag before setting the registers. Now ... CALL routine resets the CARRY Flag.
[quote]
Another ... -
Union flag on Sabre Wulf game boxLooking at this pic, I noticed that the Sabre Wulf box has a Union flag style sticker on it: [url]http://www.digitalarcade.co.uk/speccy/DSC05157001.…
... [I]used[/I] as a flag, not a jack, but it ... Jack. Being flown as a flag.
IYSWIM.
flag.
I'll get ... -
Union flag on Sabre Wulf game boxLooking at this pic, I noticed that the Sabre Wulf box has a Union flag style sticker on it: [url]http://www.digitalarcade.co.uk/speccy/DSC05157001.…
The flag sticker is quite common on ... thrown away along with the Flag sticker and at that time ... the American re-releases the Flag is printed directly on the ... -
Bad things you did as a kidOk, fess up. What's some of the worst things you did as a kid? For me: (1) Almost burning a neighbour's hedge to the ground. (2) Wiping a big dog…
... -racism.
Nicking Chequered Flag from WH Smiths - how many ... -
Sinclair Game Compilation (Sinclair Research Ltd)I remember having this or something similar (Comes on about half a dozen tapes) compiled with a ZX Spectrum. The only problem is i can't remember whi…
... " and had...
Chequered Flag, Scrabble, Hungry Horace, Make-A ... -
Sinclair Game Compilation (Sinclair Research Ltd)I remember having this or something similar (Comes on about half a dozen tapes) compiled with a ZX Spectrum. The only problem is i can't remember whi…
... " and had...
Chequered Flag, Scrabble, Hungry Horace, Make-A ... -
Union flag on Sabre Wulf game boxLooking at this pic, I noticed that the Sabre Wulf box has a Union flag style sticker on it: [url]http://www.digitalarcade.co.uk/speccy/DSC05157001.…
[QUOTE=aowen;209773]That's odd. And full marks for not calling it the Union Jack.[/QUOTE]
Not to be confused with "The Official Union Flag" in [i]Technician Ted[/i] (both versions). ;) -
Revisiting Old VinylI was just listening to Dark & Long (Dark Train) by Underworld. I think this is the first time I played the record since last century. :o What an aw…
... stuff like MINOR THREAT, BLACK FLAG etc?
CELINE ... -
Revisiting Old VinylI was just listening to Dark & Long (Dark Train) by Underworld. I think this is the first time I played the record since last century. :o What an aw…
... stuff like MINOR THREAT, BLACK FLAG etc?
CELINE ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... /> You will need Instead a flag f to indicate if the ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... /> You will need Instead a flag f to indicate if the ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... globals g_uchar0 and g_puchar0
// flag bits:
// bit 0 = draw ... the function, individual bits of "flag" are set to draw those ... plot background. We check if "flag" bit 0 is set, indicating ... -
Saboteur for Commodore 16Do you know Speccy version of "Saboteur"? Of course you do. Versions for Commodore 64 and Amstrad CPC are very similar to Spectrum's but there is als…
Mmmmm, loverly shite brown background too!
The Mastertronic version of Formula #1 simulator was very different too - like Pole Position on the C16, on the Speccy it was a Chequered flag clone. -
What Shop Did Spectrum come fromWhat shop was your spectrum purchased at? I my mum got ours for Christmas 1983 from W.H.Smith in Oxford. The guy in the shop asked my Mum if she wa…
... , Horace Goes Skiing and Chequered Flag. Even Castle Spellerous got played ... -
What Shop Did Spectrum come fromWhat shop was your spectrum purchased at? I my mum got ours for Christmas 1983 from W.H.Smith in Oxford. The guy in the shop asked my Mum if she wa…
... , Horace Goes Skiing, Chess, Chequered Flag) in the shopping trolley, under ... -
He's back......and he's got a new trick! AY Chip here. I've been away far too long. I would like to announce 'HatStand': for no adequately explored reason, I h…
... to copyright message. Check your flag implementation.
5. Check ... to be the problem - my flag implementation is actually a bit ... (most noticeably P/V Overflow flag) - but I now have better ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... iteration if active
f - flag set when c>0 ... -
Easy Compare On 2 Byte Register?e.g. HL, BC, DE Has anybody got a really easy way of doing this without comparing each byte seperately? Any maths has no effect on the flags as far a…
XOR A ; Clear Carry flag and zero A
SBC HL,DE ; Compare HL and DE
OR H
OR L
JP Z,match ; Zero flag will be set if HL=DE -
Easy Compare On 2 Byte Register?e.g. HL, BC, DE Has anybody got a really easy way of doing this without comparing each byte seperately? Any maths has no effect on the flags as far a…
... ;213114]XOR A ; Clear Carry flag and zero A
SBC ...
JP Z,match ; Zero flag will be set if HL ... -
I have bought a brand new motorbike.Saturday before last, I was sitting at home late at night with a cup of coffee, flicking through MCN, and saw that Yamaha's were still doing 0% finan…
meh, I'd rather take my kids on the back of a motorbike, than be like the lentil muching tree hugging, eco friendly, hippy lot, that bung their precious kids in a stupid trailer with a flag on it, and tow them behind a bicycle. -
Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…
... 'flyback' interrupt routine sets the flag and I test for it ... that only exits when the flag is set. This means ... quicker than doing any other flag test and speed is important ... accumulator
; the plus/minus flag is automatically set
; no ... -
He's back......and he's got a new trick! AY Chip here. I've been away far too long. I would like to announce 'HatStand': for no adequately explored reason, I h…
... /> Incidentally, I've fixed the flag implementation (I think), with the ... -
Whats Gone Wrong - Pixels Everywhere!Changed one small piece of code, that doesnt do anything to the screen and the following has happened: [img]http://www.officetrack.com/download/wos/…
... is unexpected carry or zero flag set on when increasing A ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... " but also ensures the carry flag is reset on return from ... them returns with the carry flag set. So by adding this ... -
Tau CetiThe zip of the [url=ftp://ftp.worldofspectrum.org/pub/sinclair/games/t/TauCeti.tzx.zip]original release[/url] of [url=http://www.worldofspectrum.org/…
... loader but with long pilots (flag bytes are 35 and 33 ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... moves still exist. (Maybe a flag could prevent this, but it ... -
Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…
... appmake
#
# Flag to stimulate alternate handling of ... math constants, this flag is
# supplied ... LIBPATH - (this is a z80asm flag for
# libraries)
flag (echo commands) and switch on ...
