Search found 89 matches

by christian
Sat May 22, 2021 1:34 pm
Forum: BASIC programming
Topic: Looking for a BASIC trick for RESTORE N
Replies: 5
Views: 1051

Re: Looking for a BASIC trick for RESTORE N

You can try:

Code: Select all

100 GOSUB 1000: READ A
....
900 DATA 900,901
1000 DOKE #B0,DEEK(#AC) :RETURN
1001DATA 1000,1001
by christian
Mon May 17, 2021 1:47 pm
Forum: Technical questions
Topic: Oric HFE file
Replies: 60
Views: 4462

Re: Oric HFE file

I just submitted a PR for oricutron to correct the problem.

@AtmoeX: thanks
by christian
Sun May 16, 2021 5:31 pm
Forum: Technical questions
Topic: Oric HFE file
Replies: 60
Views: 4462

Re: Oric HFE file

Jeff wrote:
Sun May 16, 2021 4:52 pm
And don't forget the write splice. The extras bit(s) + the write splice mixed with the previous data may result to any possible value.
Exact.

So, it's time to add some improvements to Oricutron.

Thanks
by christian
Sun May 16, 2021 3:44 pm
Forum: Technical questions
Topic: Oric HFE file
Replies: 60
Views: 4462

Re: Oric HFE file

You're right about Oricutron. What you are saying is that the FDC automatically adds this extra byte after the CRC, so if we format a floppy disk there will also be this extra byte at the end of the index field? I don't remember reading this in the FDC specs but maybe I missed it. The other thing I ...
by christian
Sun May 16, 2021 1:14 pm
Forum: Technical questions
Topic: Oric HFE file
Replies: 60
Views: 4462

Re: Oric HFE file

I checked SEDO40.DSK and hxctest_hfe.dsk from hxctest.zip. The size of GAP and the order of the sectors are not the same i don't know why but this is not the issue with Oricutron I found some tracks that seem weird to me. These are sectors 6 and 7 of track 7 that correspond to your test program (bit...
by christian
Fri May 15, 2020 10:50 am
Forum: Emulators
Topic: Sound hacking and Oricutron: Paste from clipboard in Atmos mode?
Replies: 17
Views: 4823

Re: Sound hacking and Oricutron: Paste from clipboard in Atmos mode?

keymap file: use 1 line per keycode to translate, with the following pattern: <SDL_host_keycode> : <SDL_oric_keycode> Here is the file I use on my french laptop (decimal values): 38 : 49 233 : 50 34 : 51 39 : 52 40 : 53 45 : 54 232 : 55 95 : 56 231 : 57 224 : 48 41 : 45 61 : 61 33 : 92 94 : 91 36 : ...
by christian
Thu Mar 19, 2020 2:12 pm
Forum: Demos
Topic: Swiss16 - the Sweet16 port for Oric by [raxiss] + demo
Replies: 3
Views: 1899

Re: Swiss16 - the Sweet16 port for Oric by [raxiss] + demo

Nice demo and port! A small note, the BRxx instructions of the original version used a relative displacement which allowed to load a sweet16 program anywhere in memory, but this version seems to use absolute addresses. Maybe a relative displacement of +/- 32767 might be enough (but this will slightl...
by christian
Sat Jan 25, 2020 4:56 pm
Forum: Technical questions
Topic: Jasmin time
Replies: 29
Views: 13467

Re: Jasmin time

FTDOS use always IRQ to read or write data
by christian
Fri Jan 17, 2020 10:41 am
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 156
Views: 108850

Re: Clock Signal — an Oric emulator for macOS and Linux

actually, follow-up query on the Jasmin: if you can select arbitrarily many then how do you deselect drives?
Drive 0 -> 0x3FC, Drive 1->0x3FD, Drive 2->0x3FE, Drive 3->0x3FF
To select a drive write 1 to the corresponding address and 0 to deselect.
by christian
Fri Jan 10, 2020 12:04 pm
Forum: Technical questions
Topic: Jasmin time
Replies: 29
Views: 13467

Re: Jasmin time

I do not remember ever having encountered this problem with my Jasmin.
Do you have the same problem within other address ranges?
by christian
Wed Dec 11, 2019 6:37 pm
Forum: Painting tricks
Topic: A little sprite-demo (textmode)
Replies: 27
Views: 37408

Re: A little sprite-demo (textmode)

Works with Oricutron too
by christian
Mon Dec 02, 2019 11:47 am
Forum: Technical questions
Topic: Atmos/Microdisk - ghost in the machine!?!?!?
Replies: 28
Views: 10909

Re: Atmos/Microdisk - ghost in the machine!?!?!?

<r>I think the FDC should be a WD1793, not a MB8877.<br/> They are "firmware compatible" but not "pin compatible"<br/> <br/> Here is the datasheet: <URL url="http://bitsavers.org/components/westernDigital/FD179X-02_Data_Sheet_May1980.pdf"><s>[url]</s><LINK_TEXT text="http://bitsavers.org/components/...
by christian
Sun Nov 24, 2019 6:41 pm
Forum: Emulators
Topic: Oricutron 1.0 (EDIT: Now 1.2)
Replies: 191
Views: 167145

Re: Oricutron 1.0 (EDIT: Now 1.2)

I just made a PR on Github with the patch to add the support of the WRITE TRACK command.
by christian
Tue Nov 19, 2019 5:28 pm
Forum: Emulators
Topic: Oricutron 1.0 (EDIT: Now 1.2)
Replies: 191
Views: 167145

Re: Oricutron 1.0 (EDIT: Now 1.2)

I found my quick and dirty patch, it works with Ftdos and Sedoric.

I still have to add some checks to avoid having buffer overflow (when trying to format an image with more tracks than the image file)
Also the header of the disk image isn't modified...
by christian
Mon Nov 18, 2019 10:11 pm
Forum: Emulators
Topic: Oricutron 1.0 (EDIT: Now 1.2)
Replies: 191
Views: 167145

Re: Oricutron 1.0 (EDIT: Now 1.2)

I wrote a patch some time ago to support the WRITE TRACK command but I have never published.
I needed it for a program that formatted its data diskettes (can't remember its name)

If I remember correctly, my modification works but the delay before the IRQ interrupt may not be accurate.