Copyright(C) 1994 Terumasa KODAKA , Takeshi KONO
■GP-IB BIOS
o The vector address of the GP-IB BIOS (INT D1h) is not set at system startup.
Before using the GP-IB BIOS, you must set the vector address of INT D1h in advance.
When the GP-IB BIOS ROM segment is D400h, information about the vector address is stored from D540:0000h.
-----------+--------------+------------------------------
Address | Value | Meaning
-----------+--------------+------------------------------
D540:0000h | 01h | Number of entries
D540:0001h | 00h | Unused
D540:0002h | 00h | Unused
D540:0003h | 00h | Unused
D540:0004h | D1h | Vector number
D540:0005h | 00h | Unused
D540:0006h | OFFSET(WORD) | GP-IB BIOS entry offset
| | (GP-IB BIOS entry address segment value is D540h)
-----------+--------------+------------------------------
o GP-IB BIOS ROM address can be changed (default D4000h).
o The GP-IB BIOS vector number does not have to be INT D1h, but the N88-BASIC interpreter uses INT D1h as the GP-IB BIOS vector number.
Table Return Code List
----+-------------------------------------------------------------------
AH | Meaning
----+-------------------------------------------------------------------
00h | Processing completed normally
| Ended due to delimiter reception (no EOI) during RECEIVE DATA
| Ended due to STB reception of RQS bit 1 during EXECUTE SERIAL POLL (no EOI received)
01h | Ended due to delimiter + EOI reception during RECEIVE DATA
| Ended due to STB reception with RQS bit 1 and EOI received during EXECUTE SERIAL POLL
02h | Ended due to EOI reception (no delimiter) during RECEIVE DATA
80h | Conditional normal termination
| Insufficient storage space for received data during RECEIVE DATA (no delimiter received)
| No STB reception of RQS bit 1 during EXECUTE SERIAL POLL
F8h | Forced termination due to IFC reception (when slave)
FCh | Error detected (GP-IB regulation violation detected)
FEh | Forced termination due to time monitoring (timeout)
FFh | Illegal call
----+-------------------------------------------------------------------
INT D1h - Function 00h
Classification GP-IB BIOS
Name GP-IB BIOS initialization [INITIALIZE]
Target PC-9801-29 (K/N)
Input AH=00h
ES=Segment address of control information notification area
Output AH=Return code
Registers other than DS, SS, and SP are not guaranteed
Explanation o See the technical data book
Related 0000:05C2h
INT C5h
F800:7FDCh
INT D1h - Function 01h
Classification GP-IB BIOS
Name IFC setting [SET IFC]
Target PC-9801-29 (K/N)
Input AH=01h
BH=Time to activate IFC line (in 100μs units)
Output AH=Return code
Registers other than DS, SS, and SP are not guaranteed
Explanation o See the technical data book
Related
INT D1h - Function 02h
Classification GP-IB BIOS
Name Setting REN [SET REN]
Target PC-9801-29 (K/N)
Input AH=02h
Output AH=Return code
Registers other than DS, SS, and SP are not guaranteed
Explanation o See the technical data book
Related
INT D1h - Function 03h
Classification GP-IB BIOS
Name Resetting REN [RESET REN]
Target PC-9801-29 (K/N)
Input AH=03h
Output AH=Return code
Registers other than DS, SS, and SP are not guaranteed
Explanation o See the technical data book
Related
INT D1h - Function 04h
Classification GP-IB BIOS
Name Send data [SEND DATA]
Target PC-9801-29 (K･N)
Input AH=04h
ES:SI=Start address of command storage area
BX=Length of command storage area
ES:DI=Start address of data storage area
CX=Length of data storage area
AL=Delimiter specification
Output AH=Return code
Registers other than DS, SS, and SP are not guaranteed
Explanation o See Technical Data Book
Related
INT D1h - Function 05h
Classification GP-IB BIOS
Name Receive data [RECEVIVE DATA]
Target PC-9801-29 (K･N)
Input AH=05h
ES:SI=Start address of command storage area
BX=Length of command storage area
ES:DI=Start address of data storage area
CX=Length of data storage area
AL=Delimiter specification
Output AH=Return code
Registers other than DS, SS, and SP are not guaranteed.
Explanation o See the technical data book.
Related
INT D1h - Function 06h
Classification GP-IB BIOS
Name Execute serial poll [EXECUTE SERIAL POLL]
Target PC-9801-29 (K/N)
Input AH=06h
ES:DI=First address of talker information list
CX=Number of entries in talker information list
Output AH=Return code
Registers other than DS, SS, and SP are not guaranteed.
Explanation o See the technical data book.
Related
INT D1h - Function 07h
Classification GP-IB BIOS
Name Set SRQ [SET SRQ]
Target PC-9801-29 (K/N)
Input AH=07h
BH=STB value sent during serial poll
BL=EOI specification
Output AH=Return code
Registers other than DS, SS, and SP are not guaranteed.
Explanation o See Technical Data Book
Related
INT D1h - Function 08h
Classification GP-IB BIOS
Name Execute parallel poll [EXECUTE PARALLEL POLL]
Target PC-9801-29 (K･N)
Input AH=08h
ES:DI=Address of listener information list
CX=Number of entries in listener information list
BH=Parallel poll start specification
BL=PPU specification
Output AH=Return code
Registers other than DS, SS, and SP are not guaranteed
Explanation o See the technical data book
Related
INT D1h - Function 09h
Classification GP-IB BIOS
Name Set PPR mode [SET PPR MODE]
Target PC-9801-29 (K･N)
Input AH=09h
BH=PPR mode
Output AH=Return code
Registers other than DS, SS, and SP are not guaranteed
Explanation o See the technical data book
Related
INT D1h - Function 0Ah
Classification GP-IB BIOS
Name Set timeout [SET TIME OUT]
Target PC-9801-29 (K/N)
Input AH=0Ah
BH=Timeout value
00h: No timeout check
01-FFh: Timeout check time (in seconds)
Output AH=Return code
Registers other than DS, SS, and SP are not guaranteed
Explanation o See the technical data book
Related
INT D1h - Function 0Bh
Classification GP-IB BIOS
Name Check STB [CHECK STB]
Target PC-9801-29 (K/N)
Input AH=0Bh
Output AH=Return code
DH=Currently held STB value
DL=Currently held EOI designation
Registers other than DS, SS, and SP are not guaranteed
Explanation o See the technical data book
Related