Tandy 1000 SL Technical Reference Manual page 562

BIOS Services
IF CF
=
1, the call is not supported (all previous
versions of the Tandy 1000)
Tandy 1000 SL Tandy 1000 TL
Model ID
FF
FF
Submodel ID 00 01
BIOS revision level
xx
Function Descriptions
Read From EEPROM
Read the 16-bit value from the indicated EEPROM word.
Entry Conditions
AH
=
70H
AL
=
0
BL
=
word number to read (0-63)
Exit Conditions
DX
=
word value
Carry flag set indicates EEPROM call not supported.
41.