FM Towns:Model List

FM Towns Computer came in multiple models over its lifetime. The most iconic is the tower models.

It should be noted all parts can be interchanged from other models in the series of computers it belongs in. For example, the motherboard from a 2F can be used in a 1H model.

Towers

To tell the difference between the tower models is quite easy. Pay attention to the buttons on the front panel of the computer. They're different for the 4 different tower-types.

All towers come stock with a 386DX CPU clocked at 16mhz.

• 

  All Tower Generation Models. From left to right, Gen 1, Gen 2, Gen 3 and Gen 4

Generation 1 Tower Models

There is no SCSI connector on this computer and it requires a special SCSI add-on card to use a hard drive/hard drive emulator. The model number for the SCSI card is FMT-121.

Generation 1 Tower models

Model	CPU	Integrated Memory	Maximum RAM slot 1	Maximum RAM slot 2	Maximum RAM slot 3	Maximum Memory	Memory Timing	FDD	Other Notes
Model 1	Socketted	1MB	1MB	2MB	2MB	6MB	100ns	One 2Mode FDD	N/A
Model 2	Socketted	2MB	1MB	2MB	2MB	6MB	100ns	Two 2Mode FDD	N/A
S1	Socketted	1MB	1MB	2MB	2MB	6MB	100ns	One 2Mode FDD	Educational Model
S2	Socketted	2MB	1MB	2MB	2MB	6MB	100ns	Two 2Mode FDD	Educational Model

• 

  Generation 1 Tower

Generation 2 Tower Models

Generation 2 and onward have integrated SCSI controller and connector. They also have the optional ability to have an internal HDD which is not recommended.

Generation 2 Tower models

Model	CPU	Integrated Memory	Maximum RAM slot 1	Maximum RAM slot 2	Maximum RAM slot 3	Maximum Memory	Memory Timing	FDD	Other Notes
1F	Socketted	1MB	2MB	2MB	2MB	7MB	100ns	One 2Mode FDD	N/A
2F	Socketted	2MB	2MB	2MB	2MB	8MB	100ns	Two 2Mode FDD	N/A
1H	Socketted	1MB	2MB	2MB	2MB	7MB	100ns	One 2Mode FDD	20MB HDD
2H	Socketted	2MB	2MB	2MB	2MB	8MB	100ns	Two 2Mode FDD	40MB HDD
SF	Socketted	2MB	2MB	2MB	2MB	8MB	100ns	Two 2Mode FDD	Educational Model
SH	Socketted	2MB	2MB	2MB	2MB	8MB	100ns	Two 2Mode FDD	40MB HDD, Educational Model

• 

  Generation 2 Tower. Notice the CD seek light.

Generation 3 Tower Models

Generation 3 towers appear to be the most widespread models specifically the 20F model. The CPU for Generation 3 and onward are soldered and require expert-level desoldering to perform an upgrade.

Generation 3 Tower models

Model	CPU	Integrated Memory	Maximum RAM slot 1	Maximum RAM slot 2	Maximum RAM slot 3	Maximum Memory	Memory Timing	FDD	Other Notes
10F	Soldered	2MB	8MB	8MB	8MB	26MB	100ns	One 2Mode FDD	N/A
20F	Soldered	2MB	8MB	8MB	8MB	26MB	100ns	Two 2Mode FDD	N/A
40H	Soldered	2MB	8MB	8MB	8MB	26MB	100ns	Two 2Mode FDD	40MB HDD
80H	Soldered	2MB	8MB	8MB	8MB	26MB	100ns	Two 2Mode FDD	85MB HDD

• 

  Notice the CD seek light on front panel.

Generation 4 Tower Models

Generation 4 Towers are the best models introducing FAST mode for software that supported it.

Generation 4 Tower models

Model	CPU	Integrated Memory	Maximum RAM slot 1	Maximum RAM slot 2	Maximum RAM slot 3	Maximum Memory	Memory Timing	FDD	Other Notes
CX10	Soldered	2MB	8MB	8MB	8MB	26MB	100ns	One 2Mode FDD	N/A
CX20	Soldered	2MB	8MB	8MB	8MB	26MB	100ns	Two 2Mode FDD	N/A
CX40	Soldered	2MB	8MB	8MB	8MB	26MB	100ns	Two 2Mode FDD	40MB HDD
CX100	Soldered	2MB	8MB	8MB	8MB	26MB	100ns	Two 2Mode FDD	100MB HDD
SF2	Soldered	2MB	8MB	8MB	8MB	26MB	100ns	Two 2Mode FDD	Educational Model
SH2	Soldered	2MB	8MB	8MB	8MB	26MB	100ns	Two 2Mode FDD	40MB HDD, Educational Model

• 

  Generation 4 Tower. Notice the CD, HDD and FAST lights on front panel

All-In-Ones

The U* models had the CRT built into them similar to the very old Mac Classic Computers. You can even use it as a CRT for other FMT and PC98 computers. It is extremely difficult to disassemble an all-in-one model for maintenance or troubleshooting purposes. It is strongly recommended to recap the PSU cards for the Computer and the CRT sections as fast as possible Drive can also be repaired a lot easier than many desktops and towers albeit extremely painful to access. It should also be noted that SCSI ID 0 can't be accessed by U* series due to BIOS limitations and the HDD must be Device 1-8 instead. U* series also cannot shutdown via TownsOS and must be shut off by the actual power button. There is a message similar to Windows 95 where it says "It's now safe to turn off the Computer".

UX series

Very first All-in-one computer. Has the same CPU as Marty except for a 32bit BUS instead of the 16bit one in Marty.

UX Series

Model	Integrated Memory	Slot 1 Maximum	Maximum Memory	Memory Timing	FDD	HDD
UX10	2MB	8MB	10MB	100ns	1 2mode FDD	N/A
UX20	2MB	8MB	10MB	100ns	2 2mode FDD	N/A
UX40	2MB	8MB	10MB	100ns	2 2mode FDD	40MB

• 

  UX20. Notice the CD light right above the power button. Also notice the white letters on disk drive.

UG Series

CPU Clocked at 20mhz but still 386SX. Has FAST mode.

UG Series

Model	Integrated Memory	Slot 1 Maximum	Maximum Memory	Memory Timing	FDD	HDD
UG10	2MB	8MB	10MB	100ns	1 2mode FDD	N/A
UG20	2MB	8MB	10MB	100ns	2 2mode FDD	N/A
UG40	2MB	8MB	10MB	100ns	2 2mode FDD	40MB
UG80	2MB	8MB	10MB	100ns	2 2mode FDD	80MB

• 

  UG20. Notice the FAST mode light and green letters on CD drive.

UR Series

CPU is 486SX at 20mhz and also has FAST mode.

UR Series

Model	Integrated Memory	Slot 1 Maximum	Maximum Memory	Memory Timing	FDD	HDD
UR20	2MB	8MB	10MB	100ns	2 2mode FDD	N/A
UR40	2MB	8MB	10MB	100ns	2 2mode FDD	40MB
UR80	2MB	8MB	10MB	100ns	2 2mode FDD	80MB

• 

  UR20. Notice the disc drive green letters, FAST, HDD and CD lights.

Desktops

All Desktops have 3 Mode FDD and usually come with 2 FDD unless noted. All Desktops have FAST mode build in as an option.

HG Series

Very first desktops. CPU is 386DX at 20mhz.

HG/SG Desktops

Model	Integrated Memory	Slot 1 Maximum	Slot 2 Maximum	Slot 3 Maximum	Maximum Memory	Memory Timing	Other information
HG20	2MB	8MB	8MB	8MB	26MB	100ns	Example
HG40	2MB	8MB	8MB	8MB	26MB	100ns	40MB HDD
HG100	2MB	8MB	8MB	8MB	26MB	100ns	100MB HDD
SG20	2MB	8MB	8MB	8MB	26MB	100ns	Educational Model
SG40	2MB	8MB	8MB	8MB	26MB	100ns	40MB HDD, Educational model

• 

  HG20. Notice the CD Drive text.

HR Series

Not the same as HG-type desktops but looks similar. CPU is 486SX at 20mhz

HR/SR Desktops

Model	Integrated Memory	Slot 1 Maximum	Slot 2 Maximum	Slot 3 Maximum	Maximum Memory	Memory Timing	Other information
HR20	4MB	8MB	8MB	8MB	28MB	100ns	Example
HR100	4MB	8MB	8MB	8MB	28MB	100ns	100MB HDD
HR200	4MB	8MB	8MB	8MB	28MB	100ns	200MB HDD
SR20	4MB	8MB	8MB	8MB	28MB	100ns	Educational Model
SR100	4MB	8MB	8MB	8MB	28MB	100ns	100MB HDD, Educational model

• 

  HR100. Notice the CD Drive text which is totally different from similar HG series.