search

michalsc / Emu68

M68K emulation for AArch64/AArch32
Mozilla Public License 2.0
366 stars 40 forks source link

Chip Ram access slow #155

Open radi7777 opened 2 years ago

radi7777 commented 2 years ago

Hi, looks like programs starting lower than on regular 68030.. some games are slower than on stock a500... when you run an Hires interlace mode 8 colors on a RGB monitor the system feels like glue ... looks like adressing chipram is slow.... is this a bug or is it just how it is ?? bekaus of limitations of Pistorm ?

michalsc commented 2 years ago

Please add some more information. Kickstart version, workbench version. Are you using SD card as hard drive or some other solution? I need more information.

Please keep in mind chip ram is in general relatively slow on current PiStorm version (about 2MB/s) so maybe this is what you see.

radi7777 commented 2 years ago

Hi Michael, Im running an Amiga500 rev5 with 1Mb Chip / Kick 3.2 eprom Workbench 3.2. As harddrive Im using the Pi 3a+ SD card ( 128GB) As kick.rom im using 3.2.1 on the SD card.

I think as long as the Chip ram is slow its really a problem for Games... ( WhDload 98 % are fine ) but disk versions are really a problem ...

Thanx for your hard work.. really awesome project...

is there any chance to fix chipramspeed at all??? maybe pistorm isnt the right Base for your project

captain-amygdala commented 2 years ago

@radi7777 Yes, there is a chance chipram speed will be fixed. But currently I have too much on my todo list for a immediately fix. As intermediate solution you can overclock the Raspberry Pi "Core" frequency and use the experimental PiStorm Firmware. This reports 96% to 100% Chipram Speed in Sysinfo.

elerion64 commented 1 year ago

@captain-amygdala Tried overclocking RPi3A to 1500MHz, but there was no change in Chip speed. Where can we find this experimental Firmware?

I see somenthing along these lines was merged with raspi source but not with the pistorm source.