All Questions
10
questions
7
votes
1
answer
2k
views
What type of memory was used in N64 and GBA cartridges?
I would like to know if consoles like the N64 and GBA used masked ROMs or some kind of eFuse based ROM, or if they were some kind or flash or EEPROM based memory. I've read that both consoles had ...
- 172
1
vote
2
answers
192
views
How many kinds of mass-producible ROM is avaliable before 1970? [duplicate]
Back in the days before mask ROM (when invented?) we got core rope memories, or Little Old Ladies memories, which required lots of human labor to build.
Were there any kinds of ROMs which were ...
- 3,754
5
votes
4
answers
541
views
Cheapest type of Read-Only Memory allowing Random access before Year 1970
Back in the 50s and 60s people had:
random access, read-write memories like Magnetic Cores.
sequential access, read-write memories like Delay Lines and Magnetic Tapes.
And:
sequential access, write ...
- 3,754
40
votes
8
answers
12k
views
Why is EEPROM called ROM if it can be written to?
Is there a historical reason? Since it is rewritable it isn't read only by definition, so why call it so?
- 3,369
5
votes
1
answer
274
views
How was the second bank of Apple IIc ROM accessed?
The original Apple IIc had a 27128 16 KB ROM mapped into the
$C100-$FFFF range (the $C000 page was decoded for I/O). According to
the Apple IIc Technical Reference Manual the ROMEN1*
and ROMEN2* ...
- 27k
8
votes
4
answers
865
views
Does fast page mode apply to ROM?
Starting with the 4116, RAM chips from the late seventies supported fast page mode, where if you were reading nearby – particularly, successive – words, you didn't need to supply both row and column ...
- 63.1k
4
votes
1
answer
329
views
List of Intel microchips
Where could I find a list of all of the microchips released by Intel, including microprocessors, Rams, roms, storage devices. Etc.
I have checked Wikipedia, and they have the processors, but not any ...
user11220
4
votes
4
answers
895
views
What home computer was the first to use a external ROM cartridge?
When was the external ROM cartridge first used and what home computer was the first to use it?
- 4,499
16
votes
3
answers
3k
views
Speed of early ROM versus RAM chips
In the late seventies, up through around 1981, the maximum access speed of off-the-shelf RAM chips was around 2.6 MHz.
Did the same speed limit apply to ROM chips of the same era? If not, what would ...
- 63.1k
18
votes
4
answers
2k
views
Historical price of ROM
Historical price charts for RAM are quite readily available, e.g. in the mid-seventies a ballpark figure was a penny a byte. What was the price of ROM (assuming you were getting the chips produced in ...
- 63.1k