Spectrum Computing

Looks like you understand the concept of how to implement the contention just fine but the pc:n (or reg:n entries in some opcodes) are relative to the starting values of the registers at the start of opcode execution. Hence your pc+1:1x5 will be using pc+1 as meaning 25001 rather than as being 25002...

EX AF,AF' takes 4 t-states in total to fetch and process.

This is brilliant! Although obviously I died quickly just like in every other game!

PeteProdge wrote: ↑Mon May 27, 2019 4:24 pm And I also want to add - Elite. Sorry everyone, but never really delved into it.

Same, never been into Elite at all. Nor Fairlight.

That looks familiar!

I gave my copy away.

Pretty sure I did nothing of (Speccy) interest in 2018!

It's up for me at the minute.

Do what you want with it. It belongs to everybody so spread the word!

I tapped that up many months back after your initial work but then sat on it in case anything else turned up in how the bus works. Then it kinda got forgotten until now lol

48K 128K +3 ULA bus ----------------------------- 14338 14364 14367 (0x4000) 14339 14365 14368 (0x5800) 14340 14366 14369 (0x4001) 14341 14367 14370 (0x5801) 14342 14368 14371 IDLE 14343 14369 14372 IDLE 14344 14370 14373 IDLE 14345 14371 14374 IDLE During idle cycles the 48K and 128K ULAs will retu...

Blerkotron wrote: ↑Sun Oct 07, 2018 1:13 am Was that TAP one that you provided as an example?

Yeah, must've been! I definitely remember Short Circuit being one of my test games

The ZX7 compressed TAP generator got mostly finished but I went off to write a Z80 assembler that mostly got finished and then Summer came and I went off into the great outdoors and haven't coded anything in months!

Well, not quite. Your hitting Continue has nothing to do with screen updates per se. What does is the interrupt timing (as on a real machine). So if you continue stepping through your code long enough for an interrupt to trigger, the screen will update. Oh, I see. Yes, that's clearly how it should ...

Top notch work Mr R-Tape! Anyone else having difficulties loading cr*pmas.tzx? Had to fiddle about getting the first turbo loading block to work in SpecEmu only for it to fail to load later on with an R:Tape loading error which I guess was genuine error and not some form of self promotion? :) It lo...

Does Woody's technique stop BASIC changing the top bank back to bank 7, then? Works fine with the stack in a safe place for paging. Check out Amaurote's BASIC loader (128K version obviously!) :) Edit: The bank won't stick if you return to the 128 editor. My original post in this thread was really a...

10 CLEAR 24063:LOAD"MAIN"CODE ;regular code into main memory with bank 0 at the top 20 IF PEEK 23388 THEN OUT 32765,17:LOAD"AYMUSIC"CODE:OUT 32765,16 ;AY music loaded into bank 1 30 RANDOMIZE USR 24064 Try: 20 POKE 23388,17: PAUSE 1: LOAD"AYMUSIC" CODE: POKE 23388,16: ...

Back in 2000ish I discovered that I lived literally round the corner from none other than Dunny, the legendary Speccy emulator coder! I sh*t you not, that was probably the best thing to happen that day.

As would I if I was chief project leader for BSODware.

polomint wrote: ↑Sun Nov 19, 2017 6:30 pm Wow! Something works on Specemu!!!! heheh :p

You're the dev.

Let's say I have a copy of Pheenix . As this is one of those funny programs which needs to be loaded with LOAD ""CODE rather than just LOAD "", to load this: On a 48K machine, I press J, Symbol Shift + P, Symbol Shift + P, Caps Shift + Symbol Shift, I, Enter and the game loads f...

It's been hidden behind ALT-P for a long time!

There's no tokeniser so it won't work for the 48K Spectrum and it makes no attempt to validate the input. Give it garbage, expect garbage. So I kept quiet about it

Pegaz wrote: ↑Mon Nov 13, 2017 1:48 pm ...and ofc, nice to see you Woody.

Hello! It's good to be here as one of the berks!

Hello,

I like to drink alcohol and watch football.