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Results tagged with hardware
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user 276
Retro hardware generally: boards, extension cards, power supplies, peripherals. Use more specific tags as appropriate; use [case] instead for enclosures.
1
vote
Is this machine the EDVAC, MANIAC, or IAS?
Bear in mind that only one of each of the computers you mention was made. Rand built each new machine in a specific location for a specific organisation. All looking broadly similar.
Each develop …
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16
votes
Accepted
Heating issues in Apple II?
The Apple ][ could overheat if it had a number of cards installed. Especially if they were close together. So, yes, it affected (almost) all of them.
This would affect the airflow within the case a …
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41
votes
Was there a retro computer susceptible of being damaged only by issuing instructions at it?
This was, and often still is, a deliberate design feature of safety critical computers.
The Harmon VHLC, which is a 80186-based solid state interlocking used for railway signalling has been around si …
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21
votes
How did the BBC Micro stay cool?
The chips on the motherboard were quite widely spaced. This is still a design consideration when making boards more heat tolerant. Also, the chips didn't generate the sort of heat that more modern, …
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16
votes
Accepted
How can a computer use the drive's momentum for emergency power?
Any real attempt to use the momentum of the spinning disk to generate power would cause the disk to come to a halt very quickly. In essence, this is the principle behing regenerative braking of elect …
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2
votes
How were terminals connected to a PDP-11 computer?
Not quite correct.
The PDP-11, like all DEC machines, had one port which was dedicated to the console device. The dedicated console port had elevated privileges and was used by the system for event …
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12
votes
Accepted
S-100 bus and device drivers
Like most busses of its time, you had to write your own software to communicate between the cards.
The term device driver wasn't widespread at the time, but that is what you were writing.
The S-100 …
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4
votes
Game cartridges on the S-100 bus?
The S-100 bus was introduced in 1975 and the first processor cards available used the Intel 8080.
A large number of cards became available over time, including a variety of video interfaces, both m …
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-4
votes
Why does waggling the joystick of a C64 cause errors loading from tape?
Interrupts.
This is not a problem that is unique to the C64 but could be seen on many machines of the era. There is one CPU handling interrupts from various peripherals.
If the joystick is moved, o …
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10
votes
Could we change the baud rate for the two serial ports on a terminal and on a computer?
The short answer is yes. You can change the baud rate of a VT100 talking to a PDP-11.
On the VT100, this is simply done using the Set Up facility. This is entered using the Set Up key on the top le …
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