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Re: How would YOU extend the 6502?
Posted: Mon Aug 20, 2018 8:20 pm
by Druzyek
My question is where you would get 10-bit wide RAM and ROM for your new processor
Re: How would YOU extend the 6502?
Posted: Mon Aug 20, 2018 9:58 pm
by 1024MAK
Back in the 1980's, most DRAM chips were only one bit wide anyway, so you would just use ten of them instead of just eight.
ROM is slightly trickier. But if there was a new CPU that looked like it may drive sales, it is likely that a memory chip manufacturer would have produced a suitable EPROM/ROM...
Mark
Re: How would YOU extend the 6502?
Posted: Sat Aug 25, 2018 10:17 am
by Alarm Siren
Fair point MAK, I always forget that RAMs where usually 1-bit in the day.
Re: How would YOU extend the 6502?
Posted: Mon Oct 08, 2018 5:58 pm
by Aaendi
Maybe a dummy cycle reduce mode, where instructions that normally take 2 cycles take 1 cycle.
Re: How would YOU extend the 6502?
Posted: Mon Oct 08, 2018 9:44 pm
by JimBoyd
In 1980? Definitely fix the indirect jump bug so the fix makes it into the 6510.
I don't know if the 6502 could support much in the way of 16-bit instructions, but a 16-bit increment and 16-bit decrement would have been nice.