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Clone Project feedbackFinally i now have some time to start again with my clone project. I have decided to drop the 48k project and go directly on a 128k clone. This migh…
... emulation and slow down the Z80 in video area access, only ... complicated just to make the Z80 to run free of wait ... are inserted for some specific CPU instructions (for example, two or ... -
RGB values for Spectrum colorsDoes anybody know the true rgb color values for the spectrums 15 colors. I'll assume that black is 0,0,0 White is probably 255,255,255 But what are t…
... a z80 as it's main CPU, or a really slow CPU that ... SID player, the approx. emulated cpu speed works out at about ... -
Techy Z80 questions****** Question 1 ****** Take the instruction SET b, (HL). This is broken down (in machine cycles) as follows (according to Microprocessor Technolo…
... wrote:
And if the Z80 could access the memory while ... 's not exactly uncommon in CPU design to exploit paralellism where ... -
Sparky eZX-BASIC Project in need of FPGA ExpertYou probably are not familiar with this project, but it is a computer system based on Zilog's new eZ80 chip and the OS is a superset of ZX BASIC. Ju…
... is the interface to the CPU and the display RAM. Bus ... the eZ80 than with the Z80. You just can't hold ... I'd rather leave the CPU to doing other things instead ... -
8 BIT WARSwhen 8bits ruled the home market Speccys, C64 and Amstrad were the big 3 fighting it out for supremecy.... but they didnt survive which as we know wa…
... of BASIC for the Z80. One swift CPU change later and the ... -
8 BIT WARSwhen 8bits ruled the home market Speccys, C64 and Amstrad were the big 3 fighting it out for supremecy.... but they didnt survive which as we know wa…
... of BASIC for the Z80. One swift CPU change later and the ... -
8 BIT WARSwhen 8bits ruled the home market Speccys, C64 and Amstrad were the big 3 fighting it out for supremecy.... but they didnt survive which as we know wa…
... of BASIC for the Z80. One swift CPU change later and the ... -
Why relativly bad colour on Spec compared to other 8bit?Why relatively bad colour on Spec compared to other 8-bit machines like the Master system or even c64? I understand the 8x8 block that you could hav…
... on the 6809 CPU, rather than the 6502/Z80 that nearly all ... -
Sparky eZX-BASIC Project in need of FPGA ExpertYou probably are not familiar with this project, but it is a computer system based on Zilog's new eZ80 chip and the OS is a superset of ZX BASIC. Ju…
... designs with the T80/Z80 core and a genuine ... The timing on a Z80 can be predicted and ... is nothing like the Z80, even though it's ... br />
Unlike the Z80, which was a benvolent and ... databus multiplexer between display RAM, CPU and VGA logic...
... -
Sparky eZX-BASIC Project in need of FPGA ExpertYou probably are not familiar with this project, but it is a computer system based on Zilog's new eZ80 chip and the OS is a superset of ZX BASIC. Ju…
... completely isolated from the CPU and accessed by special ... run the eZ80 in Z80 compatibility mode as a ... of its extremely fast Z80 code execution and built ... eZ80 as a fast Z80. Which means the software ... RAM interfaces for easy CPU implementation. The only problem ... -
Non-spectrum Ultimate games?I was just browsing round Rare's site and their chronology: [url="http://www.rareware.com/games/timeline/timeline_content.html"]http://www.rareware.…
... just a matter of knowing Z80 and 6502, it's more ... 're more reliant on the CPU grunt of the Speccy to ... -
Write to ROM=crash?I've read in quite a few places that writing to the ROM causes a crash but on the assembly listing the comments for poke say: "Happily no check is ma…
[quote]Does this mean that pushing a value when SP -
Tzx ,tap and z80 Files in archiveJust a question - If there is a .tzx version of a file in the archive, why keep a .tap or .z80 file as well Is there a reason for this ?
... load TZXs (which needs more CPU power).
I suppose ... 's a TZX, TAP & Z80 of the same title, it ... be best to drop the Z80.
So in the ... -
OT: Just for Fun - Name this game and...machine,I will send the winner a Mars bar or something, [url="http://www.samcoupe-pro-dos.co.uk/What_is_it.png"]http://www.samcoupe-pro-dos.co.uk/W…
... QL, The Electrons CPU was not a Z80 but a MOS 6502A ... -
"Sinclair Zx Spectrum: Absolutely Better Than Commodore 64"Did you ever read this? [url="http://www.alfonsomartone.itb.it/fztsmo.html"]http://www.alfonsomartone.itb.it/fztsmo.html[/url]
... .5" disk drive and a z80 processor. Released 1985, before the ... 64) Gave it an extra CPU, and an extra video chip ... a built in 2Mhz 8502 CPU (6502 compat) and a 4Mhz ... floppy drive inside the main CPU case. (The drive is actually ... -
"Sinclair Zx Spectrum: Absolutely Better Than Commodore 64"Did you ever read this? [url="http://www.alfonsomartone.itb.it/fztsmo.html"]http://www.alfonsomartone.itb.it/fztsmo.html[/url]
[quote]
On 2005-07-08 01:03, karingal wrote:
I'm not really sure you can call the C128 a new version of the C64 if the C128 does not even use the same CPU as the C64.
[/quote]
The Z80 was added for CP/M compability -
"Sinclair Zx Spectrum: Absolutely Better Than Commodore 64"Did you ever read this? [url="http://www.alfonsomartone.itb.it/fztsmo.html"]http://www.alfonsomartone.itb.it/fztsmo.html[/url]
... not even use the same CPU as the C64.
The CPU isn't a component but ... both use the 68000 as CPU? The Amstrad CPC is a ... Spectrum because both have a Z80?
The C64 is ... -
"Sinclair Zx Spectrum: Absolutely Better Than Commodore 64"Did you ever read this? [url="http://www.alfonsomartone.itb.it/fztsmo.html"]http://www.alfonsomartone.itb.it/fztsmo.html[/url]
... not even use the same CPU as the C64.
... karingal wrote:
The CPU isn't a component but ... both use the 68000 as CPU? The Amstrad CPC is ... Spectrum because both have a Z80?
[/quote]
... the early 80's the CPU was virtually everything .
... -
New GP32 coming out....The spec looks excellent and should run MAME, SNES and hopefully GBA full speed. Whats also exciting is the TV out connection !.... The ultimate ho…
... to you.
One CPU is the main workhorse, with ... ULA emulation to the main z80 emulation - if you want accurate ... -
Some thoughts about emulationWhile discussing about 'real tape loaders' I just thinked about wat is total emulation (most complete, perfect). Some authors prefer for example loa…
... realism you add, the more CPU speed you will require. The ... require far more CPU time than emulating a simple z80/ULA combination ... ?
Highly accurate ULA/z80 interaction is needed to reproduce ... -
After roughly 22 years can you help?Hi, A long one this but here goes. Roughly 22 years ago (i was 14 if i remember right) i got a 48K speccy for christmas of my dad it was awesome an…
... . It stays for many CPU, not only Z80, although mnemonics, byte order ... -
After roughly 22 years can you help?Hi, A long one this but here goes. Roughly 22 years ago (i was 14 if i remember right) i got a 48K speccy for christmas of my dad it was awesome an…
... . It stays for many CPU, not only Z80, although mnemonics, byte order ... -
Remastering Speccy GamesHas anyone ever thought about designing remastered versions of Spectrum games for consoles like the Master System / Mega Drive? I can not code very …
... (right).
* CPU: 8-bit Zilog Z80
o 3,546 ... -
ROM POKE-able emulatorIs there an emulator available where you can POKE the ROM (and also altering it) while running? Thereby making the ROM work like RAM. Preferably a…
... Z80. And how would you go about emulating a 16-bit CPU ... . Even on very high tacted CPU. Low address space will require ... - much more registers on 16bit CPU-s. -
Z80 based computersHelp needed: Who can tell which computers besides ZX81/ZX80/Jupiter Ace/SAM Coupe: 1) use a Z80 processor 2) what the programmable RAM-size is (and…
... 't the Aquarius have a Z80 processor?
I think ... , the Aquarius does use a Z80.
However, the TI ... and used a TMS 9900 CPU. -
Has this been done before?Are there any emulators whose speed can be adjusted by the Spectrum program that the emulator itself is running? So that, say the Spectrum program ca…
... , that don't push the CPU so much). I'm just ... to be embedded in the z80. Maybe you should have a ... in an existing Spectrum program) Z80 instructions.
It's ... -
IDE InterfaceHi all, I've found a diagram for an 8-bit IDE interface...[url]http://www.zxplus3e.plus.com/interface.html[/url] It looks nice and simple and, if I…
... should be modifiable for the Z80? [url]http://mdfs.net/Info ... is memory mapped - by some CPU-s no separate I/O ... -
USB-Pen drive on SpeccyIs someone interested for it? Probably more promising for future data storage than CF cards, drives are cheaper, but making software will be much har…
... drives attaching on slow CPU-s like Z80.
But connector I ... -
MAME on the Spectrum?Yes, I know it's currently AY's job to make ludicrous posts (a position he's filling in very well, until TKRAP returns), but just out of interest, if…
... games were written on a z80 platform [/QUOTE]
CPU, Phoenix uses an 8085 ... and Galaxian use a Z80 though while bootleg Bubble ... using a more powerful CPU for running the main ... get some of the Z80-based games running under ... -
MAME on the Spectrum?Yes, I know it's currently AY's job to make ludicrous posts (a position he's filling in very well, until TKRAP returns), but just out of interest, if…
... much just a cut down Z80. The main complication is ... emulated a 65xx chip in Z80, as used for the ... get some of the Z80-based games running under ... the SAM hardware (slightly faster CPU, better graphics and sound). ... to write hand-optimised Z80 to stand a chance ...
