Abstract: A peripheral mass memory subsystem (PSS.sub.1, PSS.sub.2) of an information processing system including at least one central host (H.sub.1, H.sub.2, H.sub.4, H.sub.4), two control units (UC.sub.1, UC.sub.2) and at least one mass memory (BMD.sub.1, BMD.sub.2, . . . ,) with independent electrical power supplies (ALIM.sub.1, ALIM.sub.2, BAT.sub.1, BAT.sub.2) and each having a plurality of structural (hardware+microsoftware) elements (PR.sub.1 -PR.sub.2, DE.sub.1 -DE.sub.2, CA.sub.1 -CA.sub.2, HA.sub.1 -HA.sub.2, DA.sub.1 -D.sub.2) connected to a first and/or a second parallel-type bus (B.sub.1, B.sub.2). The subsystem is characterized in that it includes a microsoftware architecture (AML) that executes the commands of the host and informs the host of changes in state of the mass memory and is embodied by a plurality of functional microsoftware subassemblies (P, H, D, C, S), each of them specific to each structural element of each control unit and implemented in its hardware structure.

Abstract: A protected method of fast writing of information for at least one mass memory apparatus (DMM.sub.1) belonging to an information processing system including at least one central host (H.sub.1, H.sub.2), two control units (UC.sub.1, UC.sub.2) with independent electrical power supplies (ALIM.sub.1, ALIM.sub.2, BAT.sub.1, BAT.sub.2) connected to a first and second parallel bus (B.sub.1, B.sub.2) is disclosed wherein the method is characterized in that, if the host (H.sub.1, H.sub.2) is connected to each of the two buses via at least one first host adaptor (HA.sub.1, HA.sub.2) belonging to the first control unit (UC.sub.1, UC.sub.2) and the mass memory (D.sub.1 -D.sub.5) is connected to each of the two buses via a first and a second mass memory adaptor (DA.sub.1, DA.sub.2) belonging to the first and second control unit, respectively, which include a first and a second memory buffer (MTD.sub.1, MTD.sub.2), respectively,I--the block of data to be written is memorized in the first host buffer (MTH.sub.1, MTH.sub.

Abstract: Apparatus is provided for production of concrete slabs wherein a reinforced elongated concrete slab is progressively formed on longitudinal supports following the installation of the supports by mounting carriages for movement along the length of the supports, providing the carriages with a leading platform portion to facilitate construction of a metal rod reinforcement core spanning the supports and a trailing slab forming platform.

Abstract: A reinforced elongated concrete slab is progressively formed on longitudinal supports following the installation of the supports by mounting carriages for movement along the length of the supports, providing the carriages with a leading platform portion to facilitate construction of a metal rod reinforcement core spanning the supports and a trailing slab forming platform.