Jumper Status Register; General Purpose Output Register - VersaLogic EBX-22 Reference Manual

Jumper Status Register

JSR (Read Only) 1D2h
D7
Reserved Reserved
Bit Mnemonic
D7-D2 –
D1
VB_SEL
D0
–

General Purpose Output Register

GPO (Read/Write) 1D4h
D7
Reserved Reserved
This register is used for general purpose outputs.
Bit Mnemonic
D7-D3 –
D2-D0 GPO
EBX-22 Reference Manual
D6 D5 D4
Reserved Reserved
Table 41: JSR Register Bit Assignments
Description
Reserved – These bits have no function.
Video BIOS Selection – Indicates the status of jumper V6[3-4].
0 = Jumper in, Primary Video BIOS selected
1 = Jumper out, Secondary Video BIOS selected
This bit is read-only.
Reserved – This bit has no function.
D6 D5 D4
Reserved Reserved
Table 42: GPO Register Bit Assignments
Description
Reserved – These bits have no function.
General Purpose Outputs
D3 D2
Reserved Reserved VB_SEL
D3 D2 D1
Reserved GPO2 GPO1
Special Registers
D1 D0
Reserved
D0
GPO0
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