Yep all doable, just depends on how neat you want it.
Very challenging on the 1632 as only 24 pin chips, I have a similar set up on a 1732 board Basic, EDASM, Wordbee, Pascal & Disassembler a little easier with three 28 pin positions being available. This setup also has the ability to switch in an additional 24K RAM in place of Basic and Pak (EDASM) locations and switch the NET ROM out with a boot ROM and use the 50 WAY to run as a 56K Disk system.
Anyway back to the new board design.
The plan was to do a full emulation of the 8328 (as used in the Microbee PC85) with a one chip 62256 SRAM, expanded Basic in one ROM (instead of the three) and all four decodes of NET 0,1,2,3 in a second ROM, this also would include both the Shell and Help in ROM. The original plan was to combine all these into one ROM, but opted to do it across two as I was not confident with how they interacted so stuck with the two.
Finally would include the expanded decoding for all 16 PAC ROMs at C000 (0 - F) all in the last ROM, as this is the one that is most likely to change if expanding the system, keeped it in a separate ROM from the rest of the operating system to make updating less of a hassle. If you only wanted to stay with the 28 Pin EPROM instead of the 32 pin then decoding of only 8 PAC's would be available, which is equivalent to the Microbee PC85 anyway.
Ernest
Very challenging on the 1632 as only 24 pin chips, I have a similar set up on a 1732 board Basic, EDASM, Wordbee, Pascal & Disassembler a little easier with three 28 pin positions being available. This setup also has the ability to switch in an additional 24K RAM in place of Basic and Pak (EDASM) locations and switch the NET ROM out with a boot ROM and use the 50 WAY to run as a 56K Disk system.
Anyway back to the new board design.
The plan was to do a full emulation of the 8328 (as used in the Microbee PC85) with a one chip 62256 SRAM, expanded Basic in one ROM (instead of the three) and all four decodes of NET 0,1,2,3 in a second ROM, this also would include both the Shell and Help in ROM. The original plan was to combine all these into one ROM, but opted to do it across two as I was not confident with how they interacted so stuck with the two.
Finally would include the expanded decoding for all 16 PAC ROMs at C000 (0 - F) all in the last ROM, as this is the one that is most likely to change if expanding the system, keeped it in a separate ROM from the rest of the operating system to make updating less of a hassle. If you only wanted to stay with the 28 Pin EPROM instead of the 32 pin then decoding of only 8 PAC's would be available, which is equivalent to the Microbee PC85 anyway.
Ernest