Retro/pcjs
Watch
1
0
Fork
You've already forked pcjs
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Updated VT100 debugger README

Browse source
This commit is contained in:
Jeff Parsons 2016-08-14 12:04:36 -07:00
commit 4c0ffd89c0
1 changed files with 4 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

11
devices/pc8080/machine/vt100/debugger/README.md
View file

@ -22,7 +22,6 @@ maps modern keys to VT100 key addresses, and most of the mappings are 1-1. Func
- F2: PF2
- F3: PF3
- F4: PF4
- F5: KEYPAD COMMA
- F6: BREAK
- F7: LINE FEED
- F8: NO SCROLL
@ -222,12 +221,10 @@ at column 1, line 1, and the microprocessor enters its background routine, ready
Some additional observations:
- During the NVR test, a "WAIT" message is displayed in the top-left corner of the screen.
- Following the NVR test, code at 0x00D2 loops for 0xFFF (4095) times with the CLICK bit (0x80) set in the keyboard STATUS
port (0x82), generating a "bell" (beep), presumably because the NVR test failed. And one would expect the NVR checksum test
to fail, since we initialize all NVR words with the freshly-erased value of 0x3fff. Also, at some point before arriving at the
preceding loop, the "WAIT" message has been cleared.
- During the NVR test, a "WAIT" message is displayed in the top-left corner of the screen; it's cleared after the test.
- Following the NVR test, if an error was detected, code at 0x00D2 loops for 0xFFF (4095) times with the CLICK bit (0x80)
set in the keyboard STATUS port (0x82), generating a "bell" (beep). The NVR checksum test used to fail when we initialized all
NVR words with the freshly-erased value of 0x3fff; now we initialize them with canned values (see ChipSet.VT100.INIT).
Additional VT100 Resources
--------------------------