Search found 55 matches

by Maziac
Sun Jul 29, 2018 11:35 am
Forum: Software
Topic: z80dismblr v1.1
Replies: 8
Views: 1191

z80dismblr v1.1

Hi everyone, I've just released a new disassembler for the Z80. It comes with the following features: - Supports binary and *.sna (snapshot) files. - Can read MAME trace (*.tr) files. - Supports undocumented opcodes. - Supports Spectrum Next opcodes. - .dot output of caller graphs for visualization ...
by Maziac
Sun Nov 19, 2017 2:14 pm
Forum: ZX Spectrum Next
Topic: Microdrive and Interface 1
Replies: 3
Views: 618

Re: Microdrive and Interface 1

Good to know. Thanks for the info.
by Maziac
Fri Nov 17, 2017 5:44 pm
Forum: ZX Spectrum Next
Topic: Microdrive and Interface 1
Replies: 3
Views: 618

Microdrive and Interface 1

I guess it should work with the Next.
But just to be sure could someone please confirm that the original
Interface1/Microdrive HW will/do work together with the Next.
by Maziac
Fri Nov 17, 2017 5:42 pm
Forum: ZX Spectrum Next
Topic: Currah uSpeech
Replies: 38
Views: 5741

Re: Currah uSpeech

The problem with the uSpeech (if you use it from Basic) is that it hooks into the interrupt. Especially it expects the interrupt to be at address 0038h. It toggles the ROM code from the original one with its own and also jumps to that address in the Spectrum ROM. I.e. if there is something else at t...
by Maziac
Mon Sep 11, 2017 8:13 pm
Forum: ZX Spectrum Next
Topic: Currah uSpeech
Replies: 38
Views: 5741

Re: Currah uSpeech

The ROM part of the Currah is definitely not easy to integrate and I can imagine that it is difficult to implement. Maybe impossible: the Currah was already not compatible with the 128k. But what about another idea: What if just the SP0256 would be implemented in FPGA and not the Currah ROM Basic st...
by Maziac
Sat Sep 09, 2017 9:08 am
Forum: ZX Spectrum Next
Topic: Currah uSpeech
Replies: 38
Views: 5741

Re: Currah uSpeech

Here is some technical background: The Currah has a 2k ROM which originates at address 0000h. It is toggled with the original 48k ROM on every opcode fetch of address 0038h. So it is executed with each interrupt, when the Currah code has finished it itselfs jumps to address 0048h so that the origina...
by Maziac
Wed Aug 23, 2017 9:07 am
Forum: ZX Spectrum Next
Topic: Z80 undocumented opcodes
Replies: 6
Views: 865

Re: Z80 undocumented opcodes

Ok, great!
by Maziac
Tue Aug 22, 2017 7:51 am
Forum: ZX Spectrum Next
Topic: Z80 undocumented opcodes
Replies: 6
Views: 865

Z80 undocumented opcodes

Hi,
Just a quick question:
Will the Next support the Z80 undocumented opcodes like
LD ixl, n
?
by Maziac
Sat Aug 19, 2017 9:08 pm
Forum: ZX Spectrum Next
Topic: Currah uSpeech
Replies: 38
Views: 5741

Currah uSpeech

Hi,
Are there any plans to implement the currah uSpeech in FPGA in some point in time?

The problem with the currah real HW is that it would not work any more with a modern TV, so it would be great if the Next would include it right away.
by Maziac
Sun Aug 06, 2017 7:17 am
Forum: ZX Spectrum Next
Topic: DB9/Joystick
Replies: 2
Views: 366

DB9/Joystick

Hi, will the Next support a secondary joystick button? So far I could read only that DB9 is supported according to Atari spec. But what does Atari spec mean: Originally there was only one button support but as far as I remember the ST and some other Atari model supported up to 3 buttons. How many bu...