rbanffy

✨ Seasoned software developer, proficient in Python, Java. Less proficient in Ruby and Lisp. A bit rusty in C and C++. Learning Erlang very slowly. Also a computer collector and restorer, lover of 8-bit computers, mainframes and interesting Unix workstations.

email: username at that google mail thing

http://about.me/rbanffy

https://linkedin.com/in/ricardobanffy

[ my public key: https://keybase.io/rbanffy; my proof: https://keybase.io/rbanffy/sigs/HtF1uAf_RNpwIkNP1-YGWP_-3doWV6S5Cc1KywXeLYo ]

πŸ“… Joined in 2008

πŸ”Ό 188,928 Karma

✍️ 62,335 posts

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15 latest posts

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πŸ‘€rbanffyπŸ•‘1hπŸ”Ό5πŸ—¨οΈ0

(Replying to PARENT post)

Dream big. Imagine what we could do with a 5 GHz 6502.

Of course, the memory would need to be on the same die to be able to function at that speed, but my Apple //e had a full megabyte of RAM (in addition to the 64 on the motherboard) and, IIRC, Apple’s bank switching scheme could accommodate up to 16 megs. The chip would be mostly SRAM.

Talking to anything outside the chip would slow things down considerably though, and using one in place of a real 6502 would be comically weird. It’d feel like a machine that spends 99.999999% of the time waiting for IO.

Which, amusingly, feels the opposite of mainframes, where the machine appears to never have to wait for IO.

πŸ‘€rbanffyπŸ•‘1hπŸ”Ό0πŸ—¨οΈ0

(Replying to PARENT post)

The first time I used an IBM PC I was so disappointed. On every aspect of the interaction my Apple II would run rings about it. Character IO via the BIOS on CGA was glacial to avoid writing to VRAM and getting snow, and an 8088 at 4.77 MHz was not nearly 4.77 times faster than the 6502 at 1 MHz - in fact, it felt slower.

It’s not that the 8088 was a horrible CPU - it was a pretty ok one - it’s just that the 6502 was a beast of a CPU.

πŸ‘€rbanffyπŸ•‘1hπŸ”Ό0πŸ—¨οΈ0
πŸ‘€rbanffyπŸ•‘6hπŸ”Ό1πŸ—¨οΈ0

(Replying to PARENT post)

Also https://news.ycombinator.com/item?id=48068333, but got little traction.
πŸ‘€rbanffyπŸ•‘6hπŸ”Ό0πŸ—¨οΈ0
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πŸ‘€rbanffyπŸ•‘10hπŸ”Ό1πŸ—¨οΈ0

(Replying to PARENT post)

I wonder how long does it take to back it up.
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