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Dk'tronics memory expansion

9 bytes added, 03:23, 6 February 2010
/* Description */
The available memory could be switched in and out of the Z80 64K address block in banks of 16K using either RSX (bar) commands within basic or within an assembly code program.
 
== RSX Commands ==
The additional bar commands were:
* |Poke, n, s, v - Write to a byte in the expansion RAM
A further command which was considered to be only for 'advanced' users was also described later in the handbook:
A further command which was considered to be only for 'advanced' users was also described later in the handbook. The command * |Askram, E, V (E=enquiry No. V=variable) could be used to request information from the expansion card, including the amount of RAM available (where E=1), return the number of banks available (where E=2) or (E=3) returned a 0 or 1 to indicate whether the expansion card 'had a problem'.
== Technical ==
Nocash
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