Questions tagged [performance]
The performance tag has no usage guidance.
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Maximum speed of serial I/O bit-banged by 8-bit CPU
I'm interested in the limiting speed of I/O on 8-bit computers.
Setting aside the case where parallel cables are used, like the IEEE 488 bus on the Commodore PET; such cables are expensive, which is ...
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When did the PC bus start slowing access to video RAM?
The PC architecture, from the original IBM PC onward, has always been designed around the idea that video memory will be on an expansion card. This was an unusual design decision; most 80s computers ...
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Relay computer performance
I'm looking for performance data on relay based computers, and even human based computers. Performance, as in, time to perform an addition, multiple, etc.
The Nordhaus data is all I have been able to ...
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What did it cost the 8086 to support unaligned access?
The Intel 8086 supported unaligned loads and stores of 16-bit data, e.g. mov ax, foo was guaranteed to work even if foo was odd.
What did this cost, in terms of performance and chip area, compared to ...
- 63.1k
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When did CMOS processors become the fastest?
The earliest CMOS microprocessors (RCA 1802, HP Stirling RISC, et.al.) were slower than contemporaneous NMOS microprocessors and Bipolar logic computers. (IIRC, both the 1802 and the 6502 could be ...
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How much slower was the 286 in protected mode?
I am given to understand that if the 80286 is run in protected mode, it is slightly slower than real mode, due to memory protection checks taking extra clock cycles.
Just how much slower is it? Either ...
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Was the ZX Spectrum used for serious number crunching?
From Eurogamer’s obituary of Sir Clive Sinclair:
Sinclair never intended for his computers to be games machines, but
that was what the market decided they were. Within the space of a few
years, the ...
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Was any DRAM ever slower than 2 MHz?
4096-bit dynamic RAM chips were commonly used for main memory in microcomputers of the late seventies. According to the Mostek MK4096 datasheet, it was sold in various speed grades, with the slowest ...
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What made some 8-bit BASIC interpreters especially slow?
Most 8-bit systems had a BASIC interpreter that ran at a rate roughly commensurate with the CPU type, speed, memory bandwidth and interrupt status. Some systems, however, had interpreters that ran at ...
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Did the ARM-1 really outperform the 387?
According to a comment on https://news.ycombinator.com/item?id=31985142
The first benchmarks indicated the plain Archimedes had higher FP throughput than a 16MHz 386 with a 387.
The original ...
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Fastest 8-bit microprocessor for multiply-accumulate?
I'm wanting to identify which 8-bit microprocessor would have the best performance for a multiply-accumulate operation.
By "operation", I mean the minimal implementation for 16-bit operands ...
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Who were the market for those "speed up your computer" shareware applications back in the day? [closed]
In the Swedish computer magazine PC Hemma ("Home PC") from February 1997 (p. 68), they included a floppy disk with shareware programs related to "trimming your PC", as well as a ...
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Hardware for higher resolution VESA modes
What computer hardware was needed to run something like Duke Nukem 3D smoothly at the 640x480 or 800x600 VESA modes at the time (1996-1997)?
I was wondering if this was possible with contemporary ...
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Why might Quake run slowly on a modern PC in DOS, but not in a virtual machine?
I noticed back in the DOS gaming era that DOS games ran slowly in hi-res modes. I was surprised to discover that this could be true on a modern machine.
I booted a 2017 i5 7200u (I think) laptop into ...
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The march of progress before microchips
Throughout the 1980s and 1990s, computer power seemed to increase so drastically that pretty much any computer you could own rapidly became obsolete. Such were the strides in available power and ...
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