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4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…
... changing the ZXI spec. If decoding !M1 is truly unecessary to ... config register included in the decoding of it's own write ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
[QUOTE=Patrik Rak;758844]Thanks, zub. The Q register was just a broader concept along the way of analyzing this. While it conceptually exists (it is the place where the new flags are assembled before they are moved to the F register), we have no evidence ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... [URL="http://www.z80.info/decoding.htm"]Decoding Z80 Opcodes[/URL] (an ... -
DivMMC with other components..Having transferred my loyalties from the IF1bis to the DivMMC, I have finally been able to spend some time trying to set mine up on my ZX Spectrum. I…
... knows, Sinclair used partial address decoding.
I suspect the SPECTRA ... uses the same partial address decoding for the RS232 interface, so ... -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... will either be ignored when decoding ED opcodes or cleared by ... -
C64 for the PiSomeone is writing the C64 natively for the Rasberry Pi and it looks amazing. I hope this will make someone do a ZX Spectrum too. Take a look its a…
Edge Connector InformationHi Everyone, Hope I'm posting in the correct forum. I've recently been playing with an Arduino and got to thinking it would be fab if I could do so…
... some I/O address. The decoding can be as simple as ... low. This kind of partial decoding is how sinclair's own ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... of doing the (partial) address decoding for both port 31 and ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... bit more selective in its decoding.
The +D interface ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... bit more selective in its decoding.
The +D interface ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... interface to do the necessary decoding.
But if you ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... interface to do the necessary decoding.[/QUOTE]
Why do ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... built-in Kempston Joystick, simplified decoding which does not allow to ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... built-in Kempston Joystick, simplified decoding which does not allow to ... /> How simple is this simplified decoding? Which address bits does it ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... ]How simple is this simplified decoding? Which address bits does it ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... it's not doing full decoding, or at least even looking ... problem with its design. That decoding wouldn't even read a ... machine uses different and crude decoding to everything else that has ...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…
... at least 9 bits of decoding, if not all 16, to ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... machine uses different and crude decoding to everything else that has ...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…
... would use the same address decoding logic. It's just that ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... 8-bit address so the decoding logic is minimal.
decoding (A4 and A8-15), if ...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…
... number of devices at 8. Decoding is cheap and it would ...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…
... number of devices at 8. Decoding is cheap and it would ...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…
... away with the same reduced decoding behaviour? :D
It ... if it means extra address decoding.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…
... away with the same reduced decoding behaviour? :D[/QUOTE]
Well ... decoder.[/QUOTE]
Full decoding is trivial really, the main ...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…
... interface to do that much decoding. And at some point I ...Game codeHi Quick questions. Would a game such as manic miner of the hobbit have been written just in basic or will it have been assembly? Also these slow …
... become unreadable and full of decoding errors.
Disk drives ...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 as you want by decoding the high address byte :)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 as you want by decoding the high address byte :)[/QUOTE ...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…
... . There's actually almost no decoding logic needed at all doing ...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…
... , I'd recommend full port decoding if possible as we're ...
