Search found 1308 matches

by Symoon
Mon May 21, 2018 11:29 pm
Forum: 6502 assembly coding
Topic: 6502 flags C, N, Z, V and tests
Replies: 7
Views: 137

Re: 6502 flags C, N, Z, V and tests

All those other options are very interesting, keep bringing them on ;) (Initially I made this table was because I needed extremely compact and fast ways to set/test/branch; I counted bytes and cycles many, many times... But having other ways to do is very interesting and can sometimes spare a specif...
by Symoon
Mon May 21, 2018 10:00 pm
Forum: Tape and floppy disk converters
Topic: Oric DSK Manager
Replies: 37
Views: 1982

Re: Oric DSK Manager

+1 I think you're right. I belive these "merged" files were created 1st to record BIG files, like accounts history, addresses, whatever. Here André seemed to have used this feature in another way, to make a multipart file. In the end it's probably technically the same thing, but used for two differe...
by Symoon
Mon May 21, 2018 9:49 pm
Forum: Technical questions
Topic: Pravetz 8D: loading tapes?
Replies: 9
Views: 154

Re: Pravetz 8D: loading tapes?

Thanks! There's also a chip on my board which is not on yours, just above the sound chip?

Sadly I'm away from the computer for a few weeks now, and I didn't take any picture showing the resistor in detail. We'll have to wait!
by Symoon
Mon May 21, 2018 6:22 pm
Forum: Technical questions
Topic: Pravetz 8D: loading tapes?
Replies: 9
Views: 154

Re: Pravetz 8D: loading tapes?

And here's mine. The ROM is not socketed here.

Not sure what they're used for, but we clearly don't have the same chips, at several places :shock:
IMG_9347_pravetz_Symoon.JPG
by Symoon
Mon May 21, 2018 2:00 pm
Forum: Technical questions
Topic: Pravetz 8D: loading tapes?
Replies: 9
Views: 154

Re: Pravetz 8D: loading tapes?

Next is the ROM - and here is difference for sure exactly in the tape related code (not counting the obvious changes in the message strings and character definitions)! It starts at #E4B6:Oric-8D-ROM-diff.jpg Here are bytes: Oric Atmos: E4B6 8e b1 02 a2 09 20 c9 e6 9d a7 02 ca d0 f7 20 c9 e6 f0 0a e...
by Symoon
Mon May 21, 2018 12:05 pm
Forum: Technical questions
Topic: Pravetz 8D: loading tapes?
Replies: 9
Views: 154

Re: Pravetz 8D: loading tapes?

Thanks ISS for such a detailed reply! So apprently, I won't have to buy another Pravetz!
That's too bad, really. But that explains maybe why there was a specific need/design for a disk drive.

I'll try and check if it could be a software thing (If it's hardware... I'm ignorant ;) )
by Symoon
Mon May 21, 2018 11:01 am
Forum: Technical questions
Topic: Pravetz 8D: loading tapes?
Replies: 9
Views: 154

Re: Pravetz 8D: loading tapes?

Ok, CSAVE works fine, but I can't load again what was saved.

I opend the case and saw nothing special except a RAM chip that was badly inserted. Fixed that; no change.
:cry: :cry: :cry:

Will post photos later, if needed.
by Symoon
Mon May 21, 2018 9:10 am
Forum: Technical questions
Topic: Pravetz 8D: loading tapes?
Replies: 9
Views: 154

Pravetz 8D: loading tapes?

Hi, I bought years ago a Pravetz 8D. At the time, I tried to load tapes and it didn't seem to work. Tried again today, to see if Novalight would work on it, but same result: zero loading, any source, standard format, tried two players, various sound volume... All my other Orics load nicely anything....
by Symoon
Mon May 21, 2018 9:06 am
Forum: Operating systems
Topic: INSERT MASTER DISC IN DRIVE A
Replies: 10
Views: 400

Re: INSERT MASTER DISC IN DRIVE A

Sorry, not much time for this thread at the moment, but: maybe it should be changed at several places on the disk? From vague memories, there are banks, as well as INIT command (building a new disk), that might duplicate some code. Also, you can try downloading Sedoric 4 and see if you can find how ...
by Symoon
Sat May 19, 2018 11:31 pm
Forum: Tape and floppy disk converters
Topic: Oric DSK Manager
Replies: 37
Views: 1982

Re: Oric DSK Manager

Here is the info which describes what PATCH.001 is and how to create it. The info is extracted from "SEDORIC 3.0 à NU". patch-001.pdf To create file is used: COPYM"P?"TO"PATCH.001" which merges the 3 parts. Unfortunately, I don't know more about Sedoric internals. Maybe @Symoon can help more (or an...
by Symoon
Sat May 19, 2018 10:06 am
Forum: 6502 assembly coding
Topic: 6502 flags C, N, Z, V and tests
Replies: 7
Views: 137

6502 flags C, N, Z, V and tests

In my recent works, not being comfortable with assembler, I had to look for many information sites. One thing I never found and thought it was missing, was a summary of the flags that could be set by the user, and tested. In the end, only the Carry flag can be fully operated and tested with specific...
by Symoon
Sat May 19, 2018 9:45 am
Forum: 6502 assembly coding
Topic: Pseudo 3D Starfield
Replies: 3
Views: 5380

Re: Pseudo 3D Starfield

Anyone ever found something about this?
Theres was a great starfield at the beginning of Mercenary, which existed on C64 and many other machines. I suppose we could find the code.
by Symoon
Fri May 18, 2018 10:05 am
Forum: Tape and floppy disk converters
Topic: Oric DSK Manager
Replies: 37
Views: 1982

Re: Oric DSK Manager

Also, PATCH.001 is a merged file (3 files in it).
by Symoon
Fri May 18, 2018 9:32 am
Forum: Operating systems
Topic: INSERT MASTER DISC IN DRIVE A
Replies: 10
Views: 400

Re: INSERT MASTER DISC IN DRIVE A

The patch is extensively described in Sedoric à Nu page 475-477. Patched version is available on Oric.org: https://www.oric.org/index.php?page=software&fille=detail&num_log=741 BTW I found back an "optimized" version I made long ago. I'm copying it here for you to check if it sounds OK to you... IIR...
by Symoon
Thu May 17, 2018 8:54 pm
Forum: Operating systems
Topic: INSERT MASTER DISC IN DRIVE A
Replies: 10
Views: 400

Re: INSERT MASTER DISC IN DRIVE A

I can't recall much about Sedoric 4 as Michel did most of the coding work, I think it uses one more bank so less room on disk I suppose. About Tap2dsk, can't tell you much... Maybe a minimal Sedoric designed to be better than slave disks that do require master disks, but not to have the full OS? (ju...