Search found 13 matches

by AndyC
Fri Dec 15, 2017 3:47 pm
Forum: Off Topic
Topic: The Last Jedi
Replies: 5
Views: 96

Re: The Last Jedi

I enjoyed it. It has some nods in the direction of Empire Strikes Back, but probably more so to Return of the Jedi. However it certainly felt less of a re-hash than Force Awakens did, definitely doing it's own thing that was separate from previous stories. I wasn't entirely sold on the ending though...
by AndyC
Thu Dec 14, 2017 8:46 am
Forum: Games/Software
Topic: The A-Z of the best Speccy games (classic: 1982-1993)
Replies: 54
Views: 376

Re: The A-Z of the best Speccy games (classic: 1982-1993)

Einar Saukas wrote:
Wed Dec 13, 2017 10:15 pm
AndyC wrote:
Wed Dec 13, 2017 10:04 pm
I think the only choice I'm not conflicted with is ZZoom and only because I wasn't a fan of Zombie Zombie.
Better than Zynaps?
Well now I have none. Dammit.
by AndyC
Wed Dec 13, 2017 10:04 pm
Forum: Games/Software
Topic: The A-Z of the best Speccy games (classic: 1982-1993)
Replies: 54
Views: 376

Re: The A-Z of the best Speccy games (classic: 1982-1993)

So difficult to pick. R-Type feels like it deserves a place, but that excludes Robocop and Rainbow Islands. I think the only choice I'm not conflicted with is ZZoom and only because I wasn't a fan of Zombie Zombie.
by AndyC
Sat Dec 09, 2017 12:31 pm
Forum: Programming
Topic: 128k paging BASIC loader
Replies: 19
Views: 290

Re: 128k paging BASIC loader

This is the scenario: Stack below 24064, main code fills 24064 up to the top, including vector table at 65024 in main (=bank 0?) filled with db 253, JPs to interrupt routine at 32768. Interrupt routine will page in bank 1, call AY music there, then page bank 0 back in. If you're using an original 1...
by AndyC
Wed Dec 06, 2017 8:13 pm
Forum: Programming
Topic: Daft question about interrupts...
Replies: 5
Views: 162

Re: Daft question about interrupts...

No. As long as the I register is outside the $40–$7f range, you’re good. Also, the kosher way to return from an ISR is RETI, not RET. ;) Not strictly true. If you set the I register to a value between $C0 and $FF and have contended memory paged in at $C000 you will crash an old school 128K (but not...
by AndyC
Thu Nov 30, 2017 1:30 pm
Forum: Games/Software
Topic: Poll: Manic Miner vs Jet Set Willy
Replies: 22
Views: 331

Re: Poll: Manic Miner vs Jet Set Willy

Has to be Jet Set Willy, it was probably the first exposure to truly "open world" games and provided endless fascination just wandering off to find new rooms - trying to actually complete it wasn't even part of why I played it back in the day (though I have done since). Not until the likes of Knight...
by AndyC
Mon Nov 27, 2017 11:46 pm
Forum: Programming
Topic: Register Addressing Modes
Replies: 8
Views: 234

Re: Register Addressing Modes

Memory Indirect would suggest a level of double indirection, in the same way that Register Indirect does. So if ADDR was 4000h and the value stored at 4000h was 8000h, the a memory indirect load would fetch the byte from 8000h. That's not something the Z80 supports. LD A, (ADDR) is just plain old in...
by AndyC
Sun Nov 26, 2017 8:26 am
Forum: Programming
Topic: Missed Interrupts with DI+IM2 in assembly
Replies: 14
Views: 302

Re: Missed Interrupts with DI+IM2 in assembly

The Gate Array in the CPC holds the interrupt line until the Z80 acknowledges it, which is why you won't miss an interrupt there (well unless you DI for long enough that multiple interrupts fire). IIRC the Speccy, in contrast, just pulses the interrupt line at the start of the frame. That has the ad...
by AndyC
Fri Nov 17, 2017 9:37 pm
Forum: Games/Software
Topic: The Great Giana Sisters...
Replies: 15
Views: 420

Re: The Great Giana Sisters...

Honestly, there's a pretty good reason Nintendo weren't happy about it. It's a fairly terrible game on all platforms.
by AndyC
Tue Nov 14, 2017 6:42 pm
Forum: Miscellaneous
Topic: World of Spectrum....
Replies: 60
Views: 2068

Re: World of Spectrum....

I suspect now is not the time to have that conversation, everything is still a bit raw, but I'd much rather a forum that allowed discussions about the wider scene (warts and all) than one which arbitrarily shuts down conversation without justification.