IBM System/23 Datamaster: Difference between revisions
Content deleted Content added
Added interrupts |
Detailed test 05 |
||
Line 230:
! Test !! Description !! Notes
|-
| 00/FF (uninitialized) || Data bus test (undocumented) || writes and reads to port 0x4C (8255 managing keyboard, port A).
|-
| 01 || CPU || 8085 self-test.
|-
| 02 || First unpaged ROS ROM || This is the ROM at 0000h.
|-
| 03 || Reserved || Unused. Tests pass directly from 02 to 04.
|-
| 04 || RAM || Test for the first unpaged 16KB. Lecture of register 0x2e.
|-
| 05
|-
| 06-07 || CRTC || Initialization and test; any error in this step or earlier requires a probe
|-
| 08 || Page registers || For CPU access, ROM only
| |||