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Wolfenstein / Doom for 48k SpectrumHi, is there any game / demo of this kind that runs on 48k machines? Thanks.
OH FFS we have 48k to play with, what do you expect an exact pixel to pixel repro of the original it's nice just see someone actually updating an explaining an already excellent piece of software. -
Wolfenstein / Doom for 48k SpectrumHi, is there any game / demo of this kind that runs on 48k machines? Thanks.
... do you expect an exact pixel to pixel repro of the original it ... guys are interested in how to create custom levels for Wolf2004 ... you are aware of how to use TR-DOS disk images ... -
next pixelI searched the "Discussions" groups for the phrase "next pixel" and got no matches - and removing the quotes it discards the "next" and just searches…
... address
zx_saddr2py = screen address to pixel y coord
zx_saddrpup = screen ... address pixel up
zx_aaddr2saddr = attribute address to screen address
...
screen address = pixel display ... -
How much memory on sprites, maps etc.I've been tinkering with shifting & pre-shifting sprites recently, but as I haven't had that much experience with Z80 assembly I sometimes find it ha…
... 't assume you're going to use 256 of them - you ... the number of tiles down to save memory. You could also ... have each screen only able to use 16 tiles out of ... they are (or just one byte to say where in the tileset ... to pick 16 from). Or 15 ... -
Games with good scrollingI know the Speccy's forte was not scrolling games but their must have been some that not flick screen and maybe even smooth! I remember playing a few…
... about 1 1/2 frames to copy up an entire screen ... draw new sprites (sorted top-to-bottom if necessary) and try ... works in conjunction with having to pixel-scroll the scenery in memory ... -
decoding loading barsI was idly pondering if it would be possible to decode the tape loading bars - just the header, say, for a standard loader, to determine the title o…
... [b]at worst[/b], have to guess parts of 2 bytes ... or 32768 ), and a checksum byte to work with.
Worst ... -
decoding loading barsI was idly pondering if it would be possible to decode the tape loading bars - just the header, say, for a standard loader, to determine the title o…
... [b]at worst[/b], have to guess parts of 2 bytes ... or 32768 ), and a checksum byte to work with.
Worst ... of having an automated algorithm to decode it all for you ... data?). Moreover, you'll need to actually know the timings for ... -
calculator and sinusok, look at the Sysel's routine: [PHP]3 5b00 *s 4 5b00 tabsin = #7000 03 mksin 19.11.1995 Busy soft …
... from the first byte
* If you're going to keep one ... mantissa bytes, add 0 to that first byte; to keep two, add 0x40 ... ; to keep three, add 0x80; to keep ... scheme you just need to keep the first byte to get the exact ... -
calculator and sinusok, look at the Sysel's routine: [PHP]3 5b00 *s 4 5b00 tabsin = #7000 03 mksin 19.11.1995 Busy soft …
... the first byte
* If you're going to keep one ... bytes, add 0 to that first byte; to keep two, add ... 0x40; to keep three, add 0x80; to ... two bits of the first byte: 00 means keep one ... following byte, 01 means keep two, ... -
Converting games to disk: difficult loadersThis thread has an spanish version in foro speccy, but I haven't gathered enough information to overcome my problems. I've been converting some game…
... When the debugger opens, scroll to address 16384, highlight the address ... This will cause the debugger to break when the location 16384 ... is written to. Close the debugger and ... just written one byte to 16384, so its starting to copy the ... -
Importing binary data to paged memoryI really could use some hint :) Many emulator have a feature - open/ import binary. I select the file, give starting adress and voila ! But most of…
... memory, so you just need to swap the page you want ... with the deubgger's "Output Byte to Port" option in the Tools ... -
Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…
... by using the low-byte to select Joystick input (like ... ) and decoding the high byte to select the stick. But ... you set the high byte to indicate a row of ... ), you set the high byte and read from port $ ... And it would be easy to take any Sinclair compatible ... -
Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…
... joysticks by using the low-byte to select Joystick input (like ... ) and decoding the high byte to select the stick. But ... you set the high byte to indicate a row of ... ), you set the high byte and read from port $ ... be a trivial thing to design and construct. Alas ... -
16k programmingHi all, If I want to code something for a 16k (or any spectrum) my understanding was that if I CLEAR below 24064 and put all the code above it up to…
... TAP that corresponds to the address 23613 (the byte that will be ... you have made the checksum byte to be no longer valid. That ... loading screen, and replacing every byte in the 16K area with ... should happen (because the checksum byte doesn't match the calculated ... -
Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …
... bytes, row duplicates are likely to occur.
- $fe never ... the data.
- The last byte of the data block is ... more frequent than byte repetitions, it may be better to use row ... every "copy next byte to output") and fewer bits to indicate "repeat a ... -
Kempston (joystick) keyboard??Dear all, I am playing with an idea to have a Kempston keyboard. The wiring would be the same as Kempston Joystick to meet its standart, so that all…
... discussing how to add extra joysticks, particularly to the +2A ... bit on the high byte to select one of the ... would ignore the high byte and just use the ... a separate cable connected to a Sinclair #2 Port ... would be enough switches to reproduce the entire keyboard. ... -
Kempston (joystick) keyboard??Dear all, I am playing with an idea to have a Kempston keyboard. The wiring would be the same as Kempston Joystick to meet its standart, so that all…
... discussing how to add extra joysticks, particularly to the +2A ... bit on the high byte to select one of the ... would ignore the high byte and just use the ... a separate cable connected to a Sinclair #2 Port ... would be enough switches to reproduce the entire keyboard. ... -
DiHalt 2013Hello everyone! from 6 to 7 July in Nizhny Novgorod (Russia) will be held openair demoparty "Dihalt 2013."The program includes the following competit…
... comp" aren't good.. enough to put people off
... editor I use editor I to pixel in, so you don ... ) if I do want to include my group logo somewhere ... br /> why would I want to include the source module of ... others how to make stuff.. besides , whats to stop you ... -
DiHalt 2013Hello everyone! from 6 to 7 July in Nizhny Novgorod (Russia) will be held openair demoparty "Dihalt 2013."The program includes the following competit…
... editor I use editor I to pixel in, so you don't ... name voting.
And to enhance the intrigue. People love ... the picture.
Decided to do two versions, without the ... * teaching others how to make stuff.. besides , whats to stop you rebadging ... -
Fantasy Z80 instructions?This follows on from something catmeows said in another thread, and that I've been meaning to ask for a while. This may sound daft to people with mo…
... that it's difficult to make an orthogonal instruction ... You had enough bits to consistently use the same ... that uses a post byte to determine which registers are ... pushed or poped to/from the stack. This ... was much smaller thanks to the changes.
... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... pair to hold the data length when
;; the loaded byte is ... /> ;; IX:target address of next byte to load.
loader_entry:
byte! We need to update the
;; checksum ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... current byte being read
;; DE:number of bytes remaining to be ... /> ;; IX:target address of next byte to load.
loader_entry:
to be read
ld a,d ; place high byte into ... -
Mirroring UDG'sJust wondered is there a quick an easy way of mirroring UDGs (byte values)? i.e. BIN 11110000 becoming 00001111 etc.
In that case, do something like this (untested):
[code]; A contains the byte to flip
LD C,1
LOOP: RRCA
RL C
JR NC,LOOP
; Now C contains the flipped byte[/code] -
Mirroring UDG'sJust wondered is there a quick an easy way of mirroring UDGs (byte values)? i.e. BIN 11110000 becoming 00001111 etc.
... a,(50000) ; A contains the byte to flip
LD C,1 ... ; Now C contains the flipped byte
ld (50000),a ; result ... -
Mirroring UDG'sJust wondered is there a quick an easy way of mirroring UDGs (byte values)? i.e. BIN 11110000 becoming 00001111 etc.
... a,(50000) ; A contains the byte to flip
LD C,1 ... ; Now C contains the flipped byte
ld a,c
