Difference between revisions of "Sharp X68000 emulators"

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Revision as of 12:08, 2 November 2019

Sharp X68000
0038 01 l.jpg
Developer Sharp Corporation
Type Home computer
Release date 1987
Discontinued 1993 (?)
Predecessor Sharp X1 series
Successor ?
Emulated

The X68000 (エックスろくまんはっせん Ekkusu Rokuman Hassen) is a home computer created by Sharp, first released in March, 1987, sold only in Japan.

The X68000 to SUPER models had a Hitachi HD68HC000 CPU at 10 MHz. The XVI to Compact models had a Motorola 68000 at 16 MHz. The X68030 has a Motorola MC68EC030 CPU at 25 MHz. They had 1-4MB of RAM and 1MB of VRAM. It had a Sharp-Hudson Custom Chipset as its GPU.

Emulators

Name Operating System(s) Latest Version Libretro Core Active Recommended
PC
XM6 Pro-68k Windows 2.06 (190924)
XM6 TypeG Windows 3.31
px68k-libretro
(Fork of hissorii's branch)
Multi-platform (PC) Git (libretro)
XM6 Windows 2.06
Keropi Windows 0.65(s)
EX68 Windows 215
MAME Multi-platform 0.264
XM6i Multi-platform 0.55
px68k (hissorii) Multi-platform (macOS) 0.15
WinX68k High-Speed Windows 0.95
Mobile
px68k-libretro
(Fork of hissorii's branch)
Multi-platform
(PSP, Android, iOS)
Git (libretro)
px68k (ptitSeb) Pandora Build 09 (Pandora)
px68k (hissorii) Multi-platform 0.15

Comparisons

XM6 Pro-68k
Focused on providing necessary debugging features and has decent compatibility. It has since been succeeded by TypeG in most regards.
XM6 TypeG
It can run in X68030 mode in high accuracy, good peripheral/expansion support and will run just about any game you throw at it.
MAME
Its X68000 core is still in a very early stage of development in terms of playability and should only be used if the debugging features of Pro-68k are lacking. Small work on it was put in several versions between 0.146u5 (2012) & 0.177 (2016), but working software started being added regularly from 0.178 and onwards.
XM6i
Built largely around being able to run NetBSD/X68k. While it can run games, it is clear that this is not what XM6i is focused on.
px68k
An open-source fork of the c68k emulator. px68k has a libretro core but lacks options like save states present in other emulators. It lacks MIDI emulation.
px68k-libretro
It is supported on Windows, Linux and Mac systems; and has portable versions for PSP, Android, and other platforms. Games' performance on this emulator (Both PC & mobile variants) is considerably faster than what MAME's X68 core can achieve.[1][2][3] This libretro branch was forked, starting on May 3, 2017, from hissorii's old build (Last updated on August 2014), backported 'c68k' core from kenyahiro's 'px68k' branch (fork of hissorii's 'px68k' branch using recent c68k yabause core to support X64 build). The Pandora version (An open-source handheld PC) by ptitSeb was forked from hissorii's 'px68k' branch and encapsulates the latest code from px68k-libretro (A spin-off of hissorii's branch). It should now have good performance as of Build 09 (March 2018).

Playing Games

Before first using the RetroArch core for px68k, make sure to go under the directory for BIOS files ("system" by default) and create a new folder called "keropi". Then inside that folder put cgrom.dat and iplrom.dat from this pack. If you're using standalone Pro-68k, put those two files under the same directory as the emulator executable.

If you're using MAME's core under RetroArch, you'll need to put those X68000 BIOS files under the keropi folder: x68000, x68000 super, x68000 XVI, x68030, x68k_cz6bs1.

You'll need the MS Gothic font installed on your PC as well. Make sure to decompress the games before playing them. The lzh extension means it's a compressed archive format popular in Japan in the nineties, but fortunately, it's handled by any zipping tool worth its salt (like 7-zip).

While in-game, the F12 key (or L2 button) brings up a menu, "SWITCH for px68k", that's still in Japanese.

FDD0, FDD1
Floppy Disk Drive slots 0 and 1. You can choose another ROM from here (preferably from the current drive letter). Simpler games will use just FDD0, some like Nemesis '90 will have two disks to be loaded on FDD0 and FDD1, and multi-disk games will require going to this menu in-game at some point to change the disk image.
No Wait Mode
This makes fast-forwarding work in RetroArch if turned on.

On p68k-libretro, After the first boot, a “config” file will be generated in the “keropi” folder. You can enter your rom folder into the “StartDir” line to make it accessible from the px68k-libretro core’s in-game menu.

Core options include some other things of interest:

  • Amount of RAM used
  • CPU Clock Speed: Useful when games run too fast (for example changing from 25MHz to 10MHz to play Arkanoid as intended), or to speed up floppy disk loading times (by changing it to something like 100MHz for example).
  • Sound: 44kHz for Audio-CD sound quality is recommended.

References

  1. Px68k-libretro. forums.libretro (2017-05-04)
  2. New Core: PX68k (Android/iOS/Windows/Linux/Mac). libretro (2017-06-10)
  3. PX68k-libretro X68000 Emu Released. Reddit (2017-06-10)