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Forums > C64 Coding > 6572/6573
2017-04-24 06:10
oziphantom

Registered: Oct 2014
Posts: 174
6572/6573

Does anybody know of a info source for these models of VIC-II. The "VIC Article" doesn't seem to mention them.

VICE has a Drean mode, which is is the 72 model?
2017-04-24 07:40
tlr

Registered: Sep 2003
Posts: 1168
The Drean mode of vice emulates the 6572 (PAL-N).

The 6573 is PAL-M as used in Brazil. PAL-M is basically NTSC with PAL-style coding of the chroma subcarrier so timing should be identical to NTSC. CRT emulation should probably be different though. Not sure if that can be selected.
2017-04-24 07:54
Repose

Registered: Oct 2010
Posts: 138
6572 – VIC-II (PAL-N). Used in Argentina, Paraguay and Uruguay. Basically same as PAL-B/G, D/K, H, or I. Uses Pal timings and colours.

6573 – VIC-II (PAL-M). Used in Brazil, NTSC with Pal colours. Viewable in b/w with NTSC TV's. Should be same timing as NTSC.
2017-04-24 08:08
tlr

Registered: Sep 2003
Posts: 1168
Quoting Repose
6572 – VIC-II (PAL-N). Used in Argentina, Paraguay and Uruguay. Basically same as PAL-B/G, D/K, H, or I. Uses Pal timings and colours.
VIC-II timings are completely different though. Different clock frequency, 65 cycles per line like NTSC but 312 lines per frame like PAL.
2017-04-24 13:06
oziphantom

Registered: Oct 2014
Posts: 174
so
72 = 65/312 50
73 = 65/263 60
2017-04-24 16:01
tlr

Registered: Sep 2003
Posts: 1168
yes.
2017-04-24 16:12
Groepaz

Registered: Dec 2001
Posts: 8548
Quote:
CRT emulation should probably be different though. Not sure if that can be selected.

nah - the details that are different arent emulated either =)
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