My Collection

I may not have as (m)any FDXs as Dave, but here is my collection :-

Picture	Initial Specification	Enhanced specification
	MTX 32KB DRAM, not working Output PAL/composite to old Novex monitor New style SDX FDC card (soldered) 512KB DRAM bipolar PROM address decoder, with off-by-one error SCPM style CP/M boot ROM (slot 4) and buggy SDX ROM (slot 5) Supports B:07 from CP/M and SDX BASIC RS232 card (hacksawed, soldered) As given to me by Geoff Boyd.	MTX 32KB DRAM, not working 2_0 address decoder GAL, to disable onboard DRAM Output PAL/composite to old Novex monitor Modified OSROM, patched to support virtual tape New style SDX FDC card (soldered) 512KB DRAM address decoder GAL replaces bipolar PROM SCPM style CP/M boot ROM (slot 4) and fixed SDX ROM (slot 5) Supports B:07,F:52 from CP/M and SDX BASIC RS232 card (hacksawed, soldered) This makes this system an SDX Plus.
	MTX 64KB DRAM Output PAL/UHF to TV 80 column + RS232 card Output RGBS to monitor No RS232 chips Old style SDX FDC CP/M boot ROM (slot 3) Supports B:03,C:03 from CP/M only Attached to 5.25" Shugart floppy	MTX 64KB DRAM Output PAL/composite to car rear view LCD display 80 column + RS232 card Output RGBS to Gonbes 8200, then to VGA With RS232 chips Old style SDX FDC CP/M boot ROM (slot 4) and SDX ROM (slot 5). Supports B:07,C:07 from CP/M, and B:07 from SDX BASIC Attached to Epson SD800 dual combo 3.5" + 5.25" floppy. B: is 3.5", C: is 5.25". 5.25" configured to run at 300rpm No space to add extra memory, so I can't add virtual tape support.
	MTX 32KB DRAM VRAM, faulty Output PAL/UHF to TV	MTX No DRAM (bodged memory upgrade) VRAM replaced Output PAL/composite to car rear view LCD display OSROM and BASICROM removed REMEMOrizer 512KB SRAM, providing 64KB main RAM 320KB RAM Disc 2x64KB virtual cassette tapes OSROM and BASICROM, with virtual tape patch CP/M boot ROM (slot 4) and SDX ROM (slot 5) Supports B:18,C:19,C:1A,D:1B,F:52 from CP/M and B:18,F:52 from SDX BASIC 80 column output to VGA Speculator hardware Numeric accelerator ROM 2 support
	MTX 256KB DRAM, faulty Output PAL/UHF to to TV	MTX No DRAM (bodged memory replacement) Output PAL/composite to car rear view LCD display MTX Memory Card 32KB, 64KB or 400KB RAM, depending on jumpers NFX Compact Flash Wiznet W5100 module Modified CP/M boot ROM using Compact Flash and VDP
		MTXplus+ Z80 CPU, at various speeds from 4MHz to 16MHz Lots of RAM, lots of ROM Uses MTX keyboard V9958 VDP Sound chip Compact Flash Clock chip CP/M boot ROM using Compact Flash and V9958 (in mono or colour modes) Modified SDX ROM using Compact Flash Issues with video output - TBD
		REMEMOTECH r3 Z80 compatible CPU, at 4.166MHz and other speeds upto 25MHz 384KB RAM, 72KB ROM PS/2 keyboard VDP, outputting to 640x480 @ 50Hz (or 60Hz) VGA 80 column card support, with 80x24 and 80x48 modes, outputting to 640x480 @ 60Hz VGA Whether VDP or 80 column output appears on main VGA output switchable The other display can appear on another VGA, with an appropriate adapter RAM Disc support (upto 320KB) SD Card as a large and fast alternative to floppy disk Modified SDX ROM using SD Card and RAM Disc instead of floppy disk Virtual cassette support Sound chip Serial port Centronics support Port 7 External ROM 2 support

Perhaps one day I might own an FDX, HDX, 8" drive unit, or one of the prototypes that were made. For now, my shelf space is full.