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cpm
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walnut-creek-CDROM
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KAYPRO
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KPNUROM.LBR
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NEWROM.DQC
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NEWROM.DOC
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Text File
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2000-06-30
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3KB
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58 lines
This is a revised ROM for the 1983 Kaypro 4. I believe it should
also function on the 1983 version Kaypro II, but this has not
been checked.
Features:
1. Improved Screen Handling. (additions to original)
a. Lines no longer wrap at column 80 when no further
characters are written.
b. Cursor user modifiable with <esc>C (for flashing)
or <esc>D (not flashing), followed by cursor
character desired. DEL, ^-, and _ are the most
useful.
c. Moving the cursor on and off a position holding the
cursor character no longer deletes the character
d <esc>( sets the FLASH attribute. Characters sent
until an <esc>) sequence will flash.
e. ^_ allows entry of control characters as displayable,
for access to the Greek etc. char. set. Only the
immediately following character is displayed. This
replaces the original <esc>G and <esc>A sequences.
f. Screen scrolling maintains the original column. Up
and down scrolling is symmetrical.
g. Video output calls return the current cursor position
in hl suitable for repositioning (with <esc>=hl).
h. <esc>e and <esc>r insert/remove characters at cursor.
2. Time delays adapt to CPU clock speed. Should now be independant
of any speed-up kits.
3. Correct list status is returned for the parallel port.
4. The disk system can now be properly reset via the CPM diskreset
call. Previously could not change single to/from double sided
formats without a ^C at the CPM prompt. This prevented programs
that allowed disk changes functioning correctly.
5. The cause and location of any disk errors is reported at the
lower right of the screen.
6. Disk error retries are now shorter (by default). This can be
reconfigured with the auxiliary SYSCNTRL program, which will
also report a soft-error (i.e. recovered) summary since reset.
7. The read after write feature can now be disabled (with SYSCNTRL).
This can increase the writing speed by a factor of 2 or more.
Soft-error reports (above) can show whether your system needs
this feature for reliability.
To install, extract the NEWROM.BIN module, and program it into a
2732A Rom chip, using positive address and data conventions (the
usual). Replace the current ROM with this, and try it out. Make
sure your board (if a Kaypro II) is configured for the 2732, not
the 2716 ROM. (The rom is mounted just to the left of the Z80 chip).
A 2732 (non A) version will work on 2.5Mhz systems, but may not be
fast enought at 5Mhz.
June 1985 C.B. Falconer (203) 281-1438