After Acorn's demise, RiscStation developed their own systems based on the ARM7500FE, a Simtec motherboard and RISC OS 4. The models included:
Apart from the R7500, there were plans to launch an ARM based laptop but, unfortunately, it never materialised. The planned portable's specification can be found in the Icon Bar article The RiscStation Portable system . A description and mock-up pictures of the RiscStation Portable System were posted on the Acode Arcade forum on 8 Feb 2002.
There were also plans for a StorngARM based machine, RiscStation Evolution, which would use another Simtec motherboard. But RiscStation and RISCOS Ltd were unable to agree on how to fund the necessary changes to RISC OS to support the Simtec board.
Here is the RiscStation catalogue for 1999/2000.
Here is the RiscStation R7500 Welcome Guide .
The R7500 was launched in 1999. I bought my R7500 on ebay in January 2004.
RiscStation R7500 desktop running RISC OS 4 Select 3
RiscStation R7500 with Acorn AKF60 monitor running RISC OS Select 3
RiscStation R7500 with the case open
RiscStation R7500 with cover off. The tiny Simtec motherboard is lost in the case.
RiscStation R7500 motherboard (made by Simtec)
RiscStation motherboard from Simtec showing the 2 ROMs with white labels in the top right are RISC OS 4.03. The big chip in the middle is the ARM75000FE. The memory is a 16MB SIMM at the top.

RiscStation NetWORX HD computer running RISC OS 4.03
RiscStation NetWORX HD with Acorn AKF60 monitor running RISC OS 4.03 desktop.

RiscStation NetWORX HD keyboard
RiscStation keyboard, note the logo in the top right.

RiscStation NetWORX HD (front)
RiscStation NetWORX HD front, note the logos in the top left and bottom right. Also visible are the floppy disc drive, CD-ROM drive, the power on button and the Reset button.

RiscStation NetWORX HD (right side)

RiscStation NetWORX HD (back)
RiscStation NetWORX HD back showing (from left to right):

RiscStation NetWORX HD with case removed.
RiscStation NetWORX HD with the cover removed showing:

RiscStation NetWORX HD motherboard
RiscStation NetWORX HD motherboard, made by Simtec, showing:
Here is a HiRes picture of the RiscStation NetWORX HD motherboard .
Specification:
| Serial No. | 4343 | 4426 |
| Unique Identity | 00000086A80D | 0000008B4A22 |
| Motherboard | Simtec Electronic EB7500FE-1 | Simtec Electronic EB7500FE-1 |
| Motherboard Serial No. | n/a | n/a |
| CPU | ARM7500FE | ARM7500FE |
| CPU Clock | 56MHz | 56MHz |
| Memory | 16MB EDO SIMM | 2 x 64MB EDO SIMM |
| Memory Clock | 32MHz | 32MHz |
| Floppy Disc | Citizen OSD-U 3.5" | Citizen Z1DA-78A |
| Disc Controller | Simtec EIDE | Simtec EIDE |
| Hard Disc | Nikimi MIK-XL43A 4.3GB | Quantum Fireball 1080AT |
| CDROM | Sony CDU4811 | Hitachi CDR-7730 |
| Network driver | EtherS | EtherS |
| OS | RISC OS 4.03 9-Nov-1999 | RISC OS 4.03 9-Nov-1999 |
| SICK v1.22 Dhrystones/sec kWhetstones/sec | 63566 7381 | 63410 7371 |
| ARMSi v4.0 MIPS | 33.34 | 33.34 |