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- PATCHING PERFECT CALC v1.10 FOR KAYPROs WITH GRAPHICS MONITORS
- by
- Bob Stein
- 3-3-88
-
- Perfect Calc was bundled with many of the earlier Kaypros, before the advent
- of the monitor capable of displaying reverse video. Many of the original
- owners of Kaypro IIs went on to 4s and 10s, yet continued to use Perfect Calc.
- Unfortunately, there was no way to utilize the reverse video because Kaypro
- disabled the terminal-configuration routine in the version of PCCONFIG.COM
- that they supplied.
-
- However, it is possible to patch Perfect Calc to display the axes in reverse
- video, and to make the cursor (cell marker) a reverse video block instead of
- < >, using DDT. Be sure that you have a backup copy of PC.OVL, which is the
- file that must be patched, just in case!
-
- Since this patch will work only with version 1.10 of Perfect Calc, check the
- version you are using by loading PC; note the version number in the sign-on
- message which appears before the cells are displayed. If it is not VERS 1.10,
- stop and forget the whole thing!
-
- To start, put your Perfect Calc program disk in drive A and a disk containing
- DDT.COM in drive B. Log onto drive A and perform the following steps:
-
- You Enter Computer Displays Remarks
- --------- ----------------- -------
- B:DDT PC.OVL<cr> DDT VERS 2.2
- NEXT PC
- 8600 0100
- - - is the DDT prompt
- S844A<cr> 844A 00
- 1B<cr> 844B 00
- 42<cr> 844C 00
- 30<cr> 844D 00
- 1B<cr> 844E 00
- 42<cr> 844F 00
- 31<cr> 8450 00
- <cr> 8451 00
- <cr> 8452 00
- <cr> 8453 00
- <cr> 8454 00
- 1B<cr> 8455 00
- 43<cr> 8456 00
- 30<cr> 8457 00
- 1B<cr> 8458 00
- 43<cr> 8459 00
- 31<cr> 845A 00
- .<cr> - Type a period and <cr>
- Ctrl-C Warm Boot
- A> or A0>
- SAVE 133 PC.OVL Delete File?
- Y A> or A0>
-
- If you have followed the preceding instructions to the letter, the next time
- you use Perfect Calc you will have the cell axes and a block cursor in
- half-intensity reverse video.