Otten & Fecht 1 MB RAM-Disc: Difference between revisions
Created page with 'Not much known. Reportedly, the RAM is accessed in 128-byte sectors. That, probably via I/O ports, ie. unlike other RAM expansions, the RAM is probably not mapped to the Z80 me…' |
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Reportedly, the RAM is accessed in 128-byte sectors. | Reportedly, the RAM is accessed in 128-byte sectors. | ||
The RAM is accessed using I/O ports. It can not be banked in like common RAM expansions do. So it's a real RAM disc, not an RAM expansion. | |||
There was support for FutureOS for a while. That support was abandoned later due to the very high price of the RAM disc (more than 1000 DM) corresponding to a very small number of units sold. | |||
== I/O Ports == | == I/O Ports == | ||
#F9FC - #F9FE Otten & Fecht 1 MB RAM-Disc (R/W) | |||
#FBF0 - #FBFF Otten & Fecht 1 MB RAM-Disc (R/W) | |||
(Data taken from the FutureOS manual). | |||
Revision as of 17:30, 5 December 2013
Not much known.
Reportedly, the RAM is accessed in 128-byte sectors.
The RAM is accessed using I/O ports. It can not be banked in like common RAM expansions do. So it's a real RAM disc, not an RAM expansion. There was support for FutureOS for a while. That support was abandoned later due to the very high price of the RAM disc (more than 1000 DM) corresponding to a very small number of units sold.
I/O Ports
- F9FC - #F9FE Otten & Fecht 1 MB RAM-Disc (R/W)
- FBF0 - #FBFF Otten & Fecht 1 MB RAM-Disc (R/W)
(Data taken from the FutureOS manual).