Search found 83 matches

by R4MS
Mon Mar 30, 2020 11:24 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

BBond007 wrote:For larger files, you can also "mount" an HDF in the Linux filesystem and FTP them in. Care must be taken to properly "umount" the HDF or it will get corrupted.

The HDF has to be formatted with the OFS (Old File System). That's the only Amiga filesystem that Linux can mount.
by R4MS
Sat Feb 01, 2020 8:13 pm
Forum: MiSTer
Topic: Attempting LiteX/VexRiscV Linux on Mister
Replies: 48
Views: 5087

Re: Attempting LiteX/VexRiscV Linux on Mister

Yes, but no connection to MiSTer other than the use of the RAM board.
by R4MS
Sat Dec 14, 2019 6:51 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

So if the memory contains any non zero bit - data corruption occurs. sonycman was right. I found some time to look at the problem. There are three slow ram banks. What happens without sonycmans fix is that if a bank is disabled, read access returns the bits of the custom chip register mirror and th...
by R4MS
Fri Dec 13, 2019 3:26 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

Why? It's just replacing sel_xram with |t_sel_slow in sel_reg. OK, I missed that. This way it will work. As far as I remember it worked before, because the data from the registers will have priority over the data which is read from RAM. With the proposed change, there will no unnecessary RAM access.
by R4MS
Fri Dec 13, 2019 2:06 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

sonycman wrote:I suggest to edit gary.v that way:

and remove sel_xram completely.


My guess would be, that with that change you will get no slow ram at all. You definitely need to set sel_reg to zero, if slow_ram should be accessed.
by R4MS
Tue Nov 05, 2019 5:32 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

Detecting the size of the HDF file does not work with OS 3.1.4. I think you have to manually set an odd number of cylinders and max number of sectors and heads (63/4 ?), such that the computed capacity (cyl*sec*heads*512) is below the filesize.
by R4MS
Tue Oct 29, 2019 10:28 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

The A314 code looks nice and well organized. I think it would be useful to implement a virtual harddrive on the HPS filesystem. That's one of the things I'm looking at right now, besides the instabilities in the current hdd access.
by R4MS
Tue Oct 15, 2019 5:39 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

OK. You're right. The Product ID is 16. The 1 in 5020/1 displayed in Sysinfo is the optional serial number. The explanation in the HRM is This is for the manufacturer’s use and can contain anything at all. The main intent is to allow a manufacturer to uniquely identify individual cards, but it can c...
by R4MS
Mon Oct 14, 2019 11:27 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

Serial ID on MiSTer is 1 or 2, which does not exist in that list.
by R4MS
Mon Oct 14, 2019 9:17 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

I can think of two (more or less) intended ways to detect a MiSTer: 1. When a hdd is autodetected (eg. with HDToolBox), the manufacturer will be "MiSTer". 2. The autoconfig ID of the memory expansion is 5020 / 1. I did not find this ID in the http://amiga.resource.cx database. Might be the...
by R4MS
Sat Sep 28, 2019 6:12 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

z00pster wrote:Should 256M memory mode work on a MiSTer with 64MB? I've got 8MB FAST working but not anything higher.


256M is independent of external RAM module. But you have to select the 68020 to be able to access the memory, since it is above the 24 bit address range of the 68000.
by R4MS
Sun Sep 22, 2019 4:29 pm
Forum: MiSTer
Topic: exfat performance
Replies: 5
Views: 1448

Re: exfat performance

OK, you were right. Got a good 10 MB/s when using bs=64k. Still, I'll be using ext4 for data to exclude strange behavior of the file system.
by R4MS
Sun Sep 22, 2019 4:28 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

Make sure to (newly) set a valid memory mode in the new release. I also have to reset MiSTer from time to time, because crashes at startup or the video is corrupted.
by R4MS
Sun Sep 22, 2019 3:15 pm
Forum: MiSTer
Topic: exfat performance
Replies: 5
Views: 1448

Re: exfat performance

Sorgelig wrote:By the way, did you try to write to pre-allocated/existing file? .

Yes, no difference with dd. But when copying a file, the speed can top 10MB/s.
by R4MS
Sun Sep 22, 2019 2:18 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

Did you try to only use the 256MB fastRAM option? Moreover you could try to disable both turbo modes, which slows down access to the ram module. Also reading the first post of the MiSTer updates thread does not hurt: MiSTer updates and changelog This thread is strictly for Cores and HW updates! No d...
by R4MS
Sun Sep 22, 2019 2:15 pm
Forum: MiSTer
Topic: exfat performance
Replies: 5
Views: 1448

exfat performance

I was playing around while investigating the IDE problems in minimig and did some performance tests. dd if=/dev/zero of=/media/fat/testfile.tmp bs=1k count=$((40*1024)) writes an empty 40MB file... on the exfat partition the speed is less than 400K per second. On an ext4 partition on the same SD car...
by R4MS
Sun Sep 22, 2019 2:00 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

I'm trying to figure out how to add the displacement to the stack pointer. I've also tried that a while back, but finally gave up. I figured, that it might be good to understand die original (and much shorter) 68000 implementation of tg68k ( https://opencores.org/projects/tg68) first. Right now, I ...
by R4MS
Sun Sep 22, 2019 12:52 am
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

BlockABoots wrote:Was the option to adjust the size of the screen removed from recent versions of Minimig?, i dont see it in the Audio & video options anymore?

I just used it today on the current release.
by R4MS
Sat Sep 21, 2019 11:16 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

apolkosnik wrote: tg68k .... add validation or unit tests.

Toni Wilen has a developed a testsuit for 68k cpus: http://eab.abime.net/showthread.php?t=98747
by R4MS
Sat Sep 21, 2019 10:49 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

I'm not sure if there any apps not able to use >24bit space. There have been early apps that used the upper byte of the address registers to store stuff. Those will obviously not work on a system with a 32bit address bus. If tg68k implements this correctly, 68000 and 68010 should only use 24 bits f...
by R4MS
Sat Sep 21, 2019 4:55 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

Should be OK. We only have to disable the 8M and 16M Autoconf Memory boards in tg68k.
by R4MS
Sat Sep 21, 2019 12:21 am
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

sonycman wrote:Something was wrong with the lowered freqs?


Yes, Minimig was slower than it needed to be.
by R4MS
Fri Sep 20, 2019 11:52 am
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

Any idea?

Minimig on MiSTer has IDE timing problems, also in versions before September. Might be worse now, because of the faster memory access. I'll have a closer look at it, as soon as it gets colder outside (in central europe).
by R4MS
Mon Sep 16, 2019 7:55 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

Turbo Chip Mem only has an effect, if 2MB Chip and AGA are selected. Otherwise that option does not do anything.
by R4MS
Sun Sep 15, 2019 3:40 pm
Forum: MiSTer
Topic: Minimig (Amiga) core discussion
Replies: 1315
Views: 287606

Re: Minimig (Amiga) core discussion

Minimig on MiSTer supports reading and writing to 880K ADFs.

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