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Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
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1/ Currently, I calculate the screen hl coordinates for ... -
Data on tapesHello, I am developing a pc application that is going to calculate data which used to be calculated on ZX Spectrum machine. The data is registered s…
... application that is going to calculate data which used to be ... -
Anyone had any dodgy .torrents ? :(Just spent last 30 hours trying to download a torrent named The Da Vinci Code (2006) which was supposed to be 776 megs big and suddenly realised it`s…
... /> 1 ot 2 K the percentage dropped slowly back down to ... -
Any Celebdaq players in this forum? .. Wana form a mini league?Are there any Celebdaq players in this forum. I was hoping to form a mini league of Spectrum fans. For those that don'tt know Celebdaq is a celebri…
... aim to make as much percentage profit as you can each ... -
Rst #38This, as far as I know, is the ROM procedure that does the keyboard check. (and, at the same time, is what's being executed by interrupt in IM 1 mode…
This, as far as I know, is the ROM procedure that does the keyboard check. (and, at the same time, is what's being executed by interrupt in IM 1 mode).
It seems to write the last pressed key's code into #5C08.
The problem is that ... -
The BASIC ISRFirst of all, excuse me if my blatant ignorance about this topic makes me write some nonsense :) The thing is that I'm finishing a game in mixed BAS…
... /> I've tried to, manually, calculate where I should call to ... -
Aggravating problem with screensI've rewritten my Sam C runtime emulator code ( well almost ) to allow me to use my own routines for blitting sprites onto the screen, storing tiles …
... your program calls ROM routines ( RST 16 and jump
table ... -
Mode 2 Tile Editor SourceA Timex Mode 2 Tile Editor incorporating a byte mirror table. The compiled version is available in the CSSCGC 2008 collection from the WoS archive. …
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
Monitor/debugger that doesn't use the Speccy ROM?Was there ever a Spectrum monitor/debugger released that didn't use the ROM, for key input and character output routines? The reason I ask is that i…
... appear to use the standard RST 10 for character output, but ...Emulating RGB triad (aperture grill effect)This post is slightly off topic. But I'm going to use this effect on my speccy screen viewer... I was trying different kind of tv emulation effects,…
... filter, but I cannot explain/calculate how.
I put ... /> Do anyone know how to calculate every pixel colour in rgb ... /> So far I can only calculate the third line (which is ...Fun accountancy question of the week!!!Just for the fun of it, I thought I'd share my latest tax problem with all my spec-chums on World of Sinclair. Read this and be thankful you aren't …
... (gross amount) ? 8000
Calculate the amount of income tax ...Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …
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ld hl,$33fb ; prevent RST 0H being overwritten
ld ... /> ; simulate cold reset
rst 0h ;
; MicroSource ROM ...Getting scr addresses from x and yCould someone please tell me how to calculate the 8 screen addresses corresponding to a character printed in basic at coordinates x and y? For examp…
... please tell me how to calculate the 8 screen addresses corresponding ... would be the formula to calculate those 8 addresses?
Oli Frey artworkI`m sure this has been mentioned before, but looking back does anyone else think that a fair percentage of Crash/Zzap!64 covers were a bit...gay? I …
... else think that a fair percentage of Crash/Zzap!64 covers ...A HTML Related QuestionI am having trouble with a quirk that seems to happen in my HTML page. Quite simply I contain my content in a Table with a percentage of 75% the…
... in a Table with a percentage of 75% the screens width ...Disassemblers and RSTsI think this is a longshot, but... is anybody aware of a disassembler that handles the Interface One RSTs? e.g. RST $10 DEFW $0020. Cheers
I think this is a longshot, but... is anybody aware of a disassembler that handles the Interface One RSTs? e.g. RST $10 DEFW $0020.
CheersOld user finds love!Hi! to everyone involved with the whole retro scene, After many years of collecting classic retro I have decided to become more active within the re…
... Ltd) we will donated a percentage of on-line sales to ...How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... any CALL to ROM or RST instructions in my own code ...Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…
... in assembly. One is to calculate the address by ways of ...Tallest SpecchumOk, who beats me (and I don't mean HIT ME) Tell us how tall you are and we can make a line UP! I am 2.07m (6 feet 8 ) Here is a converter to cal…
... /> Here is a converter to calculate feet into meters
[url ...Multiple ROMsI'm mulling over the idea of a bit of hardware with a ROM in it, which has some commands that can be called by BASIC (like the old wafadrive star com…
... that the hardware traps the RST 0x08 instruction, pages in its ...How much would you pay for Radiohead's new album?So how much is everybody going to pay for Radiohead's new album? [url]http://news.bbc.co.uk/1/hi/entertainment/7026601.stm[/url] ?4 or ?5 sounds li…
... hopefully should get a better percentage of the cover price than ...A vexatious questionThis is kind of a follow-up to a question about RST #8 and hardware that I wrote in the development forum a while ago. To summarize that: certain ha…
... off the edge connector traps RST #8. For instance, the ... in when it traps an RST #8 - presumably when ... only one device can handle RST #8, surely the only ... to trap something other than RST#8. (Does the DivIDE ... hardware jumper that disables RST#8 traps and instead ...Minigame Competition MIAsA good percentage of the current MIA list pertains to the Minigame Competition since its beginning. Could someone please help find those games and up…
A good percentage of the current MIA list pertains to the Minigame Competition since its beginning.
Could someone please help find those games and upload them, so they can be added to the archive?Help with percentageCant belive im asking this but i cannot remember how do to this :oops: [code] 10 LET P=1000 20 PRINT P 30 PAUSE 25 40 LET P=(P+1%) 50 GOTO 20 [/cod…
Cant belive im asking this but i cannot remember how do to this :oops:
[code]
10 LET P=1000
20 PRINT P
30 PAUSE 25
40 LET P=(P+1%)
50 GOTO 20
[/code]
Now i know that line 40 is wrong :D ... ...The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
... ought to land (well, also calculate where the circular buffer wraps ...It's a trap!So I got a CPLD (not the eventual one I want to use for the ethernet project - rather, one I actually have here and now, an XC9536 in a PLCC44). And…
... RST8EN jumper is closed (allowing RST 8 traps to be enabled ... )" and exits, except for the RST 8 trap which does an ... point there, and do the RST 8 style trick of passing ... disassembly" especially with regards to RST 8 traps.
Oh ...
