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Fusetest port 0x7FFD test resultsHi, I'm adding the Spectrum 128K emulation to my FPGA core running on the V6Z80p platform. I'm doing some tests; running Fusetest, the machine is se…
... paging register, probably from the floating bus.[/QUOTE]
OK! Finally ... the bits 0,1,2,3,4 during the whole port ... -
48K/128K classificationI'm sorry if I've looked in the wrong places and not found it, but what are the rules regarding a game being listed as either: ZX Spectrum 48K ZX Sp…
... ROMs)
* requires the floating bus (original release of Arkanoid)
3)
* requires original 128 ... demos)
* requires a 3.5Mhz CPU (border effects timed ... 128 )
* requires a +3/+2A/+2B (border effects timed ... -
Software Projects Anaconda 128k problemTry as i might i cant get further than perhaps a screen before this crashes and resets, anybody else have that problem?
... run unmodified on an unmodified +3/2A. If the 48 version ... rule out the lack of 'floating bus'. Otherwise it's probably doing ... -
"The Amazing Rocketeer", compatible with real hardware?I've managed to create a physical copy for myself of [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0017643"]this game by John Fotou[/URL] bu…
... + (1987?) - fixed HAL as per +3
C) black +2A (1988 ... ) - semi-populated +3 mobo
D) black +2B ... /> If the game requires the floating bus it will only work on ... -
Spectaculator 8 is out!By the looks of it, Jonathon has just release Spectaculator 8. No write up on new features yet. Will have to wait. [url]http://www.spectaculator.co…
... /> Some ZX software support all 3 mouse buttons. Original old Kempston ... bitst D2-D7 are transparent (floating bus). But this original device are ... version of kempston mouse with 3 buttons (also exist next versions ... clones and emulators support also 3 buttons. -
TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... the Z80 clock speed is 3.575611 MHz, so the frame ... IN from an unattached port ('floating bus').
[*] Details on how the ... -
Checking a Spectrum +2AI've just bought a (working) black +2A, and whilst I await the new Scart lead and an appropriate PSU, I thought I would ask a quick question about an…
... the same issues as the +3 with the sound distortion.
floating bus mod for greater software compatablity ... -
Checking a Spectrum +2AI've just bought a (working) black +2A, and whilst I await the new Scart lead and an appropriate PSU, I thought I would ask a quick question about an…
[QUOTE=1024MAK;718266]I can't think of anything that needs doing for the +2B other than the floating bus mod for greater software compatablity (along with a new pair of ROMs).[/QUOTE]
Could restore the tape input to match the +2A/+3 -
Checking a Spectrum +2AI've just bought a (working) black +2A, and whilst I await the new Scart lead and an appropriate PSU, I thought I would ask a quick question about an…
... the same issues as the +3 with the sound distortion.
floating bus mod for greater software compatablity ... sound distortion issue and the floating bus modification or the ROM issue ... -
Checking a Spectrum +2AI've just bought a (working) black +2A, and whilst I await the new Scart lead and an appropriate PSU, I thought I would ask a quick question about an…
... sound distortion issue and the floating bus modification or the ROM issue ... /> +2a board is essentially a +3 board without the FDD controller ... -
ZX Spectrum clock signals comparedI haven't searched for this on WoS; it might have been posted before. But I think it's important info, and can't do any harm to repeat or show from a…
... /> * That the +2A, +2B and +3 are not compatible with all ... fixable. You can fake the floating bus by adding a resistor and ... /> *That the +2A, +2B and +3 lack some parts causing it ... />
*That +2A, +2B and +3 have different rom paging which ... -
Emulating a +2A with floating bus modBefore I start hacking Fuse's source... Does any existing emulator have an option to behave as a +2A with the [URL="http://www.secarica.ro/html/plus…
... .ro/html/plus3_hardware.html#inFFport"]floating bus modification[/URL]?
-Stephen ... /ZX_Spectrum_128Ke"]128Ke[/url] which has +3 contention and a floating bus. -
Emulating a +2A with floating bus modBefore I start hacking Fuse's source... Does any existing emulator have an option to behave as a +2A with the [URL="http://www.secarica.ro/html/plus…
... "]128Ke[/url] which has +3 contention and a floating bus.[/QUOTE]
Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
... frame. This is almost 2/3 of the available time in ... you plan to leave the floating bus synchronization in like in the ... from drawing routines, designate 2-3 buffers for 'onscreen objects' (depending ...Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
Using the floating bus, that method won't work on +3/+2A models.Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
... ]Using the floating bus, that method won't work on +3/+2A models ... .[/QUOTE]
In +2A/+3 there is no problem of ...Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
[QUOTE=antoniovillena;739433]In +2A/+3 there is no problem of ... routines).[/QUOTE]
The floating bus does not work on all ... looked at what kind of bus loading the 48k machine can ...Fixing/modding my new +3Hi, In december I won an auction for a working +3 with a dead floppy drive, + a Multiface 3, some disks and tapes, for a very low price (I think nob…
... would be to take a +3 mobo and put it in ... and hook up an external 3.5" drive. You would need ... start - modded a +3 motherboard with a supposed floating bus fix (resistor between ... if you're using a +3 motherboard you don't need ...AMX mouse emulationI'm trying to add AMX mouse emulation to Spud but not getting very far. I can get a reaction to button presses but nothing to moving the mouse. …
... written to in groups of 3 bytes to setup the
3. Set the Interrupt Enable latches ...
vector specified on the bus. If the Z80 is currently ...
is depressed. Thus, the floating bus would cause these bits to ...AMX mouse emulationI'm trying to add AMX mouse emulation to Spud but not getting very far. I can get a reaction to button presses but nothing to moving the mouse. …
... written to in groups of 3 bytes to setup the
3. Set the Interrupt Enable latches ...
vector specified on the bus. If the Z80 is currently ...
is depressed. Thus, the floating bus would cause these bits to ...Best 128k Speccy?Hi Which 128k Spectrum is the best from the point of view of the operating system, hardware design etc. Reason I'm asking is that I read on here th…
... run +3DOS software then a +3 motherboard with the hardware fixes ... you can have dual external 3.5" drives with a ... be retrofitted to support the "floating-bus" though.
If ... you maximum software compatibility. The +3 and +2A need various hardware ...X=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…
... either Issue 2 or Issue 3 keyboard selected) so I'm ... of subtle timing issue, or floating bus issue maybe?X=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…
... either Issue 2 or Issue 3 keyboard selected) so I'm ... of subtle timing issue, or floating bus issue maybe?[/QUOTE]
Doe ...'Interesting' Issue 2 modSo I've been lurking on this forum for a while and I've got to the point where I want to see if I can repair a speccy.. so I bought me a 'broken' one…
... the Z80 and the ROM/floating bus or random data produced by ... noise/the floating bus. So think boarder with the ... reckon this changes every 2/3 seconds or so. So that ...Kempston joystick detectionIn both [url="http://skoolkit.ca/disassemblies/manic_miner/asm/34252.html#34332"]Manic Miner[/url] and [url="http://skoolkit.ca/disassemblies/jet_set…
... no idea about the ULA/floating bus thing.
Any idea ... easily a scanline.
The bus is either going to be ... and the +3 as they properly buffer the Video bus rather than ...Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …
... derived from original ULA timings - 3.5MHz, 7MHz, 14MHz and 28MHz ... the VGA clock). A rudimentary floating bus is implemented which allows games ...Grey +2 and +2A differencesWas the grey +2 incompatability of some of the Spectrum games fixed with the +2A -B?<br><br>
... 2A/B is a Spectrum +3 with a cassette deck instead ... same as in the +3, therefore all the places ... paging routines. Also the "floating bus" of the original 16/48 ... 't know if the floating bus was kept in the ... to the expansion bus when they designed the +3//+2A/B ...NTSC Compatibility?Correct me if I'm wrong, but wasn't the Timex 2068 the only NTSC clone built of the ZX Spectrum? And I use clone lightly... From what I underst…
... number of games depend on floating bus behaviour. They will sit in ... the ts2068 and only around 3-4% didn't work. That ...NTSC Compatibility?Correct me if I'm wrong, but wasn't the Timex 2068 the only NTSC clone built of the ZX Spectrum? And I use clone lightly... From what I underst…
Floating bus is the name given ... computer nothing will drive the bus. So the value on ... apart from +2A, +2B and +3 Amstrad models) there are separator ... resistors between the data bus for [the lower RAM ... ] and the CPU side data bus [CPU, ROM, upper RAM, ...Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... uses the floating bus to synchronise the screen, causing +2A / +3 to lock ... up. Pentagon also does not exhibit floating bus behaviour ... -States. It checks for the floating bus and if it does not ...
