In the
HRM there's a fleeting mention of a 8368 Hires (=ECS) Agnus:
Code:
I0-I6 (bits 8-14) provide the chip identification. At present there are
four possible settings. A value of 20 or 30 indicates that the enhanced
Hires Agnus is present.
8361 (regular NTSC) or 8370 (fat NTSC) = 10 for NTSC Agnus
8367 (regular PAL) or 8371 (fat PAL) = 00 for PAL Agnus
8368 (hr) or 8372 (fat-hr) = 20 for PAL, 30 for NTSC
It seems to be designated for an A1000/A2000A like system, as opposed to the latter Fat Agnus designs. Another
internal Commodore document from 1988 mentions a 8369 Denise, I guess it is the corresponding Hires (ECS) Denise. Does anybody has seen those chips mentioned anywhere else or any other kind of additional information?
06 February 2023, 18:34
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