rbanffy

โœจย 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 ]

๐Ÿ“… Joined in 2008

๐Ÿ”ผ 189,011 Karma

โœ๏ธ 62,346 posts

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15 latest posts

Load

(Replying to PARENT post)

And here I am measuring the distance from Dublin (Ireland) to Holyhead - would be ok for fast rail, but then it's between 3 to 5 hours of rail to London.

I wonder if Ryanair pays rail companies to offer poor service.

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(Replying to PARENT post)

> aggressive

If not friend, why friend shaped?

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(Replying to PARENT post)

Awwwโ€ฆ but they are soooo cute <3

BTW, I remember a fatal accident at Brasiliaโ€™s zoo with them when I was a kid.

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(Replying to PARENT post)

I actually like it better than plain Rustโ€ฆ
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(Replying to PARENT post)

Iโ€™d also mention the ascent of the Apollo 17 LM. The camera could be commanded to move up to follow the ascent, but the command had to be given ahead of time, from the MOCR, to coincide with the launch, which was commanded from the LM. The audio from the LM was delayed, as was the video from the camera, and the command would take about a second to reach the camera on the moon.
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(Replying to PARENT post)

Mine was never an exercise in practicality - it would be ridiculous to implement, and complete overkill.

OTOH, I wonder if someone would build something like this - a 6502/65816 with lots of SRAM and system-bus compatible timings - using the cheapest commercially available foundry, how much could it cost.

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(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, Appleโ€™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. Itโ€™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.

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(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.

Itโ€™s not that the 8088 was a horrible CPU - it was a pretty ok one - itโ€™s just that the 6502 was a beast of a CPU.

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