UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

SiriusHardware · 17th Sep 2022, 1:08 am

Ah, sorry, I'm not thinking straight, I guess the architecture of the original chip limits the total span of the character set to 64 codes, making it impossible to provide a full ASCII character set.

On the other hand there's no reason why your CPLD VDU needs to limit itself to the restrictions imposed on the original VDU by the character generator, I would think you probably could provide a full ASCII character set on that.

17th Sep 2022, 1:08 am	#10
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,586	Re: DM8678 replacement Ah, sorry, I'm not thinking straight, I guess the architecture of the original chip limits the total span of the character set to 64 codes, making it impossible to provide a full ASCII character set. On the other hand there's no reason why your CPLD VDU needs to limit itself to the restrictions imposed on the original VDU by the character generator, I would think you probably could provide a full ASCII character set on that.