Difference between revisions of "Otten & Fecht 1 MB RAM-Disc"
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(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 12:30, 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).
