CRUBASE

TIPI supports CRU address base >1000 thru >1F00. The second nibble of the cru address base can be set by setting the CRUBASE jumper block.

The jumper block is a 4 bit nibble with most significant bit on the top, labelled as follows:

>1?00
  8 [..]
  4 [..]
  2 [..]
  1 [..]
    CRUBASE1

The pins on the left are all a pull down to ground.

8	4	2	1	CRUBASE	TYPICAL
0	0	0	0	>1000	Hard & RAM drives*
0	0	0	1	>1100	TI, Corcomp, Myarc FDC
0	0	1	0	>1200
0	0	1	1	>1300	RS232-1/2
0	1	0	0	>1400
0	1	0	1	>1500	RS232-3/4
0	1	1	0	>1600
0	1	1	1	>1700	hexbus
1	0	0	0	>1800
1	0	0	1	>1900	Myarc 512k
1	0	1	0	>1A00
1	0	1	1	>1B00
1	1	0	0	>1C00
1	1	0	1	>1D00	Triple Tech Clock
1	1	1	0	>1E00	SAMS
1	1	1	1	>1F00	PCode

* Myarc Ramdisk (MEXP-1) responds at crubase >1000 and >1900

The following cards are known to have user set CRUBASE:

• Horizon Ramdisk
• IDE
• Mechatronics Gram Karte
• P-Gram

This is not a complete list by any means.

For maximum TIPI functionality, TIPI works best at >1000 if along side an existing floppy controller or >1100 if alone. This allows the DSK1-3, and DSK. <volumename> feature to work.

At higher CRUBASES >1200 - >1F00, "TIPI." and "PI." devices are available, as well as all other low level functionality such as networking features.