Spectrum Computing

ketmar wrote: ↑Sun Jan 21, 2024 6:24 am sure. but i meant that Z80 keep reading and decoding HALT opcode again and again.

It keeps reading the opcode following the HALT after its first execution.

32T on 48K, 36T on 128K, 32T on +2A/+3. Might be +/-1T from those based on temperature. The early or late timings issues. Not my speciality!

There's no in-game music on SpecEmu or ZX Spin for the +2A/+3 machines but the title screen music plays at normal speed. Title screen and in-game music plays at normal speed for the 128/+2 machines on both the emulators.

Works fine for me in both emulators!

So apparently there's probably some bug affecting the Pac-Man option since there was some Pac-Man-related April Fool's code this year if you had the game ROMs installed or something.

Btw, Pac-man is still there for me in the Tools menu in the latest version. No idea what might've changed for anyone else.

hexaae wrote: ↑Sun Jul 30, 2023 12:35 pm Is there a way to contact the developer of SpecEmu? Input has some bugs and would be great an extra buttons remap on modern arcade joystick (e.g. Z assigned to 3rd button etc.)

https://discord.gg/CGsqKYSz

This reason why some emulators just reset with that disk is because they don't do: "On the ZX Spectrum 128 and ZX Spectrum +2, reading from BFFDh will return the floating bus value as normal for unattached ports, but on the ZX Spectrum +2A, +3, +2B, and +3B machines, it will return the same as ...

Another program is Plus-3-Mate, but it crashes everywhere except on SpecEmu, which unfortunatelly treats eDSK files as read only. I'm sure it was something related to the AY chip on a +3 and how it differs slightly from the 128/+2 that causes that crash/reset. The details are probably on the WoS fo...

Thanks for marking my work :D I suspect this is the same issue that causes a single column in the Shock megademo on a 128k to show incorrectly (I deliberately broke it in 2.0.4 to fix a game that wouldn't start - see the release notes). It's on the todo list for 2.0.6 to fix anyway. BTW what is tha...

https://1drv.ms/u/s!AmOOhLw8lDDyhZkh4AAs2_mKFGtn6Q v3.3 build 07/04/23 ------------------- Fixed the 128k snow effect to read from the correct upper contended page when active (thanks, Weiv, TheMartian, Richard Chandler et al) Added "Set As Next Instruction" to disassembly menu Implemented...

So a new version popped up again yesterday (link in Discord from Woody) https://1drv.ms/f/s!AmOOhLw8lDDyhYZC4AAs2_mKFGtn6Q v3.2 build 25/03/23 ------------------- Remove missing files from the recent files list on startup Added RZX streaming - sections of RZX recordings can be streamed into new RZX ...

tkfan wrote: ↑Wed Mar 08, 2023 1:28 pm I cannot download, the message says the file isn't available.

Sorry, I was only sharing the link from Discord.

Seems keybase is no more and SpecEmu lives here atm:
https://1drv.ms/u/s!AmOOhLw8lDDyhYYr4AAs2_mKFGtn6Q

From Conditional Breakpoints.txt: Not really useful yet... PC, SP IX, IY IXH, IXL, IYH, IYL AF, BC, DE, HL A, F, B, C, D, E, H, L AF', BC', DE', HL' A', F', B', C', D', E', H', L' MPTR IR I, R IM, IFF1, IFF2 MRA, MWA - mem read addr, mem write addr MRV, MWV - mem read value, mem write value PRA, PWA...

I don´t know if these too are supported via command-line: /autoload /wait /waitframes /exit /quit /dump /debug /savesnap /trace /stoptrace /tracestop /stop A good few of those also exist in the latest Zero emulator release so I guess they borrowed ideas of each other: -------------------- Command l...

The command parser has an "asm <opcode>" command if pasmo.exe is in Specemu's folder. It assembles to the address at the top of the disassembly window for quick patching of code.

SkoolKid wrote: ↑Tue Nov 15, 2022 9:49 pm INIR is not straightforward, though. Bits 5 and 3 of F are always reset, but H (bit 4) and P (bit 2) are affected in a way whose logic escapes me (so far).

Those bits are bonkers anyway, see http://www.z80.info/zip/z80-documented.pdf !

v3.2 build 25/10/21 ------------------- Fixed a bug when saving .z80 snaps under certain circumstances (thanks, Arjun Nair) Added PAC-MAN (+3) mode to the Tools menu (requires pacman.6e pacman.6f pacman.6h pacman.6j from the Midway ROM set in the pacman\roms\ folder) Corrected the HALT behaviour Th...

21 (base 26)

Most likely a loop of PUSH opcodes. I'll leave the actual code to you!

A new release:
https://keybase.pub/woodywoodster/spece ... 240322.zip

I noticed a new version just appeared: https://keybase.pub/woodywoodster/spece ... 210222.zip