14 August 2021, 11:26 | #1 |
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CD32 limitations
What are the CD32 limitatations that are not overly easy to overcome in 2021?
For example, why can't we connect a floppy drive? Someone suggested the logic has been removed at a hardware level when the CIAs and Gayle were incorporated into the akiko. Is this true? What else cannot be easily supported/added to a CD32? |
14 August 2021, 11:46 | #2 | |
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Quote:
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14 August 2021, 12:10 | #3 |
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Yes. CIAs are Akiko internal and almost all CIA I/O pins don't exist physically (basically left unconnected inside Akiko), including floppy and parallel port pins.
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14 August 2021, 12:38 | #4 | ||
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I don't think losing fmv woukd be a big issue for most Quote:
So they included the logic, but didn't connect it up... Typical commodore |
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15 August 2021, 06:10 | #5 |
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The floppy drive can be implemented with 4 stock logic chips to decode addresses (if you call that easy) as done by Bruce Abbott in 1995, but there was no way to decode _INDEX (IIRC don’t quote me) some hardware banging games did use it, so the interface was only guaranteed to ready legal system disks, and yeah I built one, and it worked. Later also did the parallel port in the same manner. The registers may exist internally. They do read as one state or another, but as stated already, it makes no difference if the pins aren’t there to physically access.
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15 August 2021, 22:17 | #6 |
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You can buy a specific floppy drive for the CD32 but its not cheap.
https://www.ebay.co.uk/itm/184324838...4AAOSwZi5eNEXE |
15 August 2021, 22:51 | #7 | |
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hahahaha it is pointless really |
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16 August 2021, 08:49 | #8 |
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It's not completely pointless. It adds lots of missing IO and someone made an 8MB Fast RAM card which replaces the RTC card these things have.
They were cheap when Analogic first started selling them. They were £69.99 soon going to £99.99 but at £199 you're better off buying a TF330 |
16 August 2021, 10:47 | #9 |
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The tf330 literally only misses the floppy port. Maybe some of the other ports, but I guess for the price one cannot complain, and there are ways around it I suppose
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