2 Tandy 102 , 1 one of them is a bit strange

[Stormtrooper of Death]

Hi, since a couple of years I have 2 Tandy 102 computers.

 

Yesterday I compared them and discovered, they werent identical

 

The free memory is not the standard, because i have some small BASIC programs inside their memory

 

Tandy 102 (1) - has this written on its BASIC start screen

 

Tandy 102 Software

Copr. 1983 Microsoft

29323 Bytes free

Ok

 

Tandy 102 (2) - has another message written on its BASIC start screen

 

TRS-80 Model 100 Software

Copr. 1983 Microsoft

17454 Bytes free

Ok

-----

 

Tandy 102 (1) is German as on the bottom is written

Serial = 709400346

Funkenstört nach DBP Vfg. 1046/1984 (is that just year 1984 ?)

RTT86D1040

 

Tandy 102 (2) has this written on the bottom:

Manufactored 1988.9

Serial = 809004255

 

----

Looking at the option rom sockets they both have strange roms

Tandy 102 (1) has these chips from left to right

 

- Japan 8724

Hm6264Lp-15

u0422990

- NFC 8530A3016

D4364C-15L

- and the last chip is a standard chip with pins in some kind of transform socket (that has holes for the pins)

 

Tandy 102(2) has these chips from left to right

 

- Japan MB8464-15L

8829 T99

- Serial no.

00028438

Part no. MOD102

100-001-10

- MIKOHN INC

SEND 2 V1.7

© 1991

 

 

-----

i discovered that Tandy 102(2) has a special rom (is it option rom ?) that contains special software made by MIKOHN to diagnose and program fruitmachines in casinos.

-------

 

So, my question is, does anybody know what strange difrences between my 2 Tandy 102 computers mean ?

 

I ask this, because I also wonder if the amazing REX upgrade can work in my Tandy 102 computers ? (oh, they both have the modem installed)

 

Thanks in advance, Richard Vermeulen.

[JPVR]

Hi Richard,

 

I see today your post and I look also for infos about my Tandy 102 computer.

My model seems to be the same as your model 1 and I have tested the new REX#.

Rex# module work prety fine but it seems that TS-DOS (delivered with the module) is not

fully compatible with this machine.

In fact, when I activate the resident portion of TS-DOS in ram, I can crash the computer when 

I try to save a text file with the TEXT editor on my external TPDD drive.

Apparently, the main rom from microsoft is a modified version for this model.

At this time I don't know more but I suspect that modifications where made for the european market.

My opinion is that your second machine was a equiped with the normal rom version (US market) and

probably fully compatible with the REX# module and TS-DOS.

 

Best regards,

 

Jean - Pierre