Values in Jantar- and Osborne-ROM:
Jantar: Osborne:
389B: 8D = Cursor Left FF = Empty
389C: 8A = Cursor Up FF = Shift
389D: 8C = Cursor Down 0D = Enter
389E: 8B = Cursor Right 27 = 'CTRL and SHIFT keys don't have their own ASCII-Codes ... does CTRL-C shows ^C after A> in CP/M?
Values in Jantar- and Osborne-ROM:
CodeJantar: Osborne: 389B: 8D = Cursor Left FF = Empty 389C: 8A = Cursor Up FF = Shift 389D: 8C = Cursor Down 0D = Enter 389E: 8B = Cursor Right 27 = 'CTRL and SHIFT keys don't have their own ASCII-Codes ... does CTRL-C shows ^C after A> in CP/M?
Unfortunately, no. CTRL with any key does not show anything
Then programs like WordStar will not be usable ... please change the byte at position 3908 to the value 8B: does pressing SHIFT shows ^L?
3908 with 8B - shows nothing 
But RIGHT ARROW shows ^L
and real SHIFT key on Jantar keyboard with UP ARROW shows ^L too
arrrgghhh... 
About non ASCII code:
CTRL and SHIFT keys don't have their own ASCII-Codes
What does this mean in our case? How are these keys read? Does it mean that the Jantar must have had a special version of CP/M?
How are these keys read? Does it mean that the Jantar must have had a special version of CP/M?
The Osborne-CP/M keyboard driver will expect CTRL and SHIFT at specific addresses in the keyboard matrix, so an adjustment would have to be made there too ... unfortunately, we can only reassign keys that generate an ASCII code ...
and real SHIFT key on Jantar keyboard with UP ARROW shows ^L too
after the last change at position 3908? Then please change also the byte at 38C8 to 8B ...
So it seems that the creators/developers of the Jantar computer wrote their keyboard driver for CP/M? Did I understand that correctly?
Yes. 
and real SHIFT key on Jantar keyboard with UP ARROW shows ^L too
after the last change at position 3908? Then please change also the byte at 38C8 to 8B ...
SHIFT = as a real SHIFT key shows ^L
RIGHT ARROW = shows ^L , with no other key pressed. Just RIGHT ARROW
So it seems that the creators/developers of the Jantar computer wrote their keyboard driver for CP/M? Did I understand that correctly?
Yes.
uhhhh... 
I found it, I hope 
UP ARROW Q is a probalby CTRL - when dad push UP ARROW Q and C shows ^C on CP/M
SHIFT = as a real SHIFT key shows ^L
OK, this works as expected ... now please change the byte value to 8A (Cursor Up) ...
Byte 3898 = 03: maps ETX (End Of Text) to ^C
Byte 38CA = 18: maps CAN (Cancel) to ^X
... these are their ASCII values, but the keys can of course be reassigned ...
Hi,
Ok. Once dad is awake he will check these keys after changing these bytes.
all the best
Arek
PS. By the way. Thank you for deciphering the abbreviations ETX and CAN My dad and I were wondering what it meant 
Byte 3898 = 03: maps ETX (End Of Text) to ^C
Byte 38CA = 18: maps CAN (Cancel) to ^X
... these are their ASCII values, but the keys can of course be reassigned ...
Hi,
in our opinion these keys working as expected
all the best
Arek
Hi,
a small summary of our search
byte 388B = UP ARROW
byte 389D = DOWN ARROW
byte 389E = RIGHT ARROW
byte 3898 = ETX
byte 38C9 = ESC
byte 38CA = CAN
byte 38C8 = SHIFT
byte 38C0 = CTRL
byte 3899 = CAPSLOCK
byte 38CC = UP ARROW WITH S
byte ???? = HT probably TAB
byte ???? = UP ARROW WITH Q probably CTRL
byte ???? = LEFT ARROW
I know I can find these three missing bytes because when I changed the whole set of bytes from 388B up to 39F3, the three keys stopped working e.g. HT stopped being TAB. It is a tedious job that I will do. Unless one of you can come up with where they are.
all the best
Arek
byte ???? = HT probably TAB
byte ???? = LEFT ARROW
HT ("Horizontal Tabulator"?) is already defined at address 389F with ASCII code 09 ... LEFT ARROW and BACKSPACE both have ASCII code 08 on the Osborne Executive ... it's the DEL key on the Jantar for now ...
Found some assembler sources of the Osborne Executive CP/M in http://bitsavers.org/bits/User…e/Executive_Double-Sided/ ...
byte ???? = HT probably TAB
byte ???? = LEFT ARROW
HT ("Horizontal Tabulator"?) is already defined at address 389F with ASCII code 09 ... LEFT ARROW and BACKSPACE both have ASCII code 08 on the Osborne Executive ... it's the DEL key on the Jantar for now ...
Found some assembler sources of the Osborne Executive CP/M in http://bitsavers.org/bits/User…e/Executive_Double-Sided/ ...
Ohhh HT apparently I "lost" a byte for this key somewhere. Thank you.
LEFT ARROW and BACKSPACE - now I understand. It's just the delete sign to the left of the cursor. Same function though two keys. All clear! Great!
But we don't have byte for UP ARROW WITH Q probably CTRL
As for the assembler sources. I've "licked" asember for the 6502; the Z80 is the uncharted, dark terrain of Mordor 
Now my dad is trying an electrical change to make the SHIFT key work as well and the CTRL key too as it is written on the Jantar keyboard, and it seems that I will be able to present the Jantar in my museum to the public.
Your help is immense and I am very grateful to you. 
all the best
Arek
the Z80 is the uncharted, dark terrain of Mordor
Of course not ... show me LDIR on the 6502 ... 
On the 6502: A brilliant or sloppy design?
Now my dad is trying an electrical change to make the SHIFT key work as well and the CTRL key too as it is written on the Jantar keyboard [ ... ]
OK, "the hard way" ... The Ctrl-Codes are still messed up on the Jantar ...
You're welcome ... glad I could be of assistance ... Does the "Meritum I" (in your museum) work?
Alles anzeigenthe Z80 is the uncharted, dark terrain of Mordor
Of course not ... show me LDIR on the 6502 ...
Now my dad is trying an electrical change to make the SHIFT key work as well and the CTRL key too as it is written on the Jantar keyboard [ ... ]
OK, "the hard way" ...
You're welcome ... glad I could be of assistance ...
hahaha. Concerns by Z80 are obviously due to lack of experience
As for the CTRL and SHIFT codes - so tell me, do you see any chance of finding and changing the codes for Jantar in CPM from Osborne without re-writing the keyboard driver? Then dad wouldn't have to change anything in the keyboard.
Yes - the Meritum (as well as the original TRS 80, which I also have in the museum) are working 
My younger brother even wrote a game "clone" of asteroids on the Meritum and Z80. Under TRS it works too under the name AstroKawaRoids (AstroCofeeRoids). I can send file here if you want
As for the CTRL and SHIFT codes - so tell me, do you see any chance of finding and changing the codes for Jantar in CPM from Osborne without re-writing the keyboard driver? Then dad wouldn't have to change anything in the keyboard.
In the Jantar MAME driver, pressing CTRL-A outputs 01 (which is correct), CTRL-B shows 18 hex: but 02 is the correct ASCII code ... the ASCII codes for each CTRL key can also be changed like above: it remains only to find out the corresponding addresses in the IMD ... The "problem" is still that the CTRL key itself (like SHIFT) cannot be remapped ...
Please post the Meritum I game in the Tandy TRS-80 section ...
Found some assembler sources of the Osborne Executive CP/M in http://bitsavers.org/bits/User…e/Executive_Double-Sided/ ...
Hi,
I took a short look into the sources and found the following in "SYSSIMAC.imd.IMG" File "SYSS1.MAC". May be interesting in terms of keyboard. (Attention: The image has a wrong extension, is only .imd not .IMG!)
PAW
P.S.: I have no idea about Osborne computer, but in Z80 programming!
;KEYBOARD CONSTANTS
KL_LEN EQU 3 ;KEY LIST LENTH
KLE_LEN EQU 2 ;KEY LIST ENTRY LENTH
KL_USED EQU 7 ;KEYLIST ENTRY USED
KY_SRVD EQU 6 ;KEY SERVICED ONCE
KROW_M EQU 38H ;ROW NUMBER MASK
KCOL_M EQU 7H ;COL NUMBER MASK
RPTCTR EQU 1 ;REPEAT COUNT
ROW0_M EQU 81H ;MASK FOR ADDRESSING ROW 0
DB_CT EQU 1 ;DEBOUNCE COUNT
IRPTCT EQU 24 ;INITIAL REPEAT COUNT (400MS)
SRPTCT EQU 3 ;SECOND REPEAT COUNT (100MS) DAB9/17
;REDUCED TO HALF ORIGINAL VALUE TO
;SPEED REPEAT.
TOT_ROW EQU 8 ;TOTAL ROWS
TOT_COL EQU 8
CTL_KY EQU 2 ;COLUMN NUMBER OF CTL,ALPHA AND SHIFT KEYS
ALPH_KY EQU 3
SHFT_KY EQU 4
PAGE
;BUFFER HANDLING EQUATES
MX_CH_BF EQU 10H ;MAX NUMBER OF CHARS IN A BUFFER
BF_OV_HD EQU 4 ;NO. BYTES OVERHEAD IN BUFFER
D_RT_LEN EQU 6 ;NO OF BYTES IN DEVICE LIST ROOT DATA STRUCTURE
NO_DEVS EQU 5 ;NUMBER OF DEVICES
NO_BUFS EQU 40 ;NUMBER OF BUFFERS
THR_HOLD EQU 4 ;NUMBER OF BUFFERS TO RESERVE FOR HIGH PRIORITY
;DEVICES
HI_PRIOR EQU 80H ;HIGH PRIORITY BIT TO INDICATE
;HIGH PRIORITY BUFFERS CAN BE USED
PAGE
;CONTROL CHARACTERS
CR EQU 0DH ;^M, CR = CARRIAGE RETURN
LF EQU 0AH ;^J, LF = LINE FEED
CRLF EQU '_'-40H ;^_, CR AND LF
BKS EQU 08H ;^H, BACKSPACE
CBELL EQU 'G'-40H ;RING THE BELL
MCUP EQU 'K'-40H ;MOVE CURSOR UP
MCRIGH EQU 'L'-40H ;MOVE CURSOR RIGHT
VDWN EQU 'V'-40H ;MOVE CURSOR DOWN
VLIN EQU '_'-40H ;NEW LINE (CR,LF)
VCLRS EQU 'Z'-40H ;CLEAR AND HOME CURSOR
VHOME EQU '^'-40H ;HOME CURSOR
ETX EQU 'C' - 40H ;ASCII ETX CHAR
ACK EQU 'F' - 40H ;ASCII ACK CHAR
XON EQU 'Q' - 40H ;ASCII XON (DC1) CHAR
XOFF EQU 'S' - 40H ;ASCII XOFF (DC3) CHAR
;ESCAPE SEQUENCE CHARACTERS
ESC EQU 1BH ;^[, ESC = ESCAPE
VLOCK EQU '#' ;LOCK KEYBOARD
VUNLK EQU '"' ;UNLOCK KEYBOARD
VCAD EQU '=' ;CURSOR ADDRESSING
VSAD EQU 'S' ;SCREEN ADDRESSING
VINC EQU 'Q' ;INSERT CHAR
VDELC EQU 'W' ;DELETE CHAR
VINL EQU 'E' ;INSERT LINE
VDELL EQU 'R' ;DELETE LINE
VCEOL EQU 'T' ;CLEAR TO END OF LINE
VCEOS EQU 'Y' ;CLEAR TO END OF SCREEN (WINDOW)
VSAL EQU 'a' ;START ALTERNATE CHARACTER SET
VEAL EQU 'A' ;END
VSHI EQU ')' ;START HALF INTENSITY
VEHI EQU '(' ;END
VSGH EQU 'g' ;START GRAPHICS
VEGH EQU 'G' ;END
VRON EQU 'b' ;SET REVERSE VIDEO BACKGROUND (BLACK ON WHITE)
VROFF EQU 'd' ;CLEAR REVERSE VIDEO BACKGROUND (SET TO WHITE ON BLACK)
VCTYP EQU '.' ;CURSOR TYPE DEFINE
VSRV EQU 'j' ;START REVERSE VIDEO
VERV EQU 'k' ;END REVERSE VIDEO
VSUL EQU 'l' ;START UNDERLINE
VEUL EQU 'm' ;END UNDERLINE
VSBL EQU '^' ;START BLINK
VEBL EQU 'q' ;END BLINK
EKC EQU '>' ;ENABLE KEY CLICK
DKC EQU '<' ;DISABLE KEY CLICK
EFKT EQU 'e' ;ENABLE FUNCTION KEY TRANSLATE
DFKT EQU 'f' ;DISABLE FUNCTION KEY TRANSLATE
VWDEF EQU 'z' ;WINDOW DEFINE
VWSET EQU 's' ;WINDOW SET
VOFF EQU 'o' ;DEFINE X-Y OFFSET
VBACK EQU 'x' ;DEFINE BACKGROUND ATTRIBUTES
UNDBIT EQU 00001000B ;UNDERLINE BIT
ALTBIT EQU 00010000B ;
REVBIT EQU 00000100B ;REVERSE VIDEO BIT
BLKBIT EQU 00000010B ;BLINK BIT
HAFBIT EQU 00000001B ;HALF INTENSITY BIT
PAGE
;BOOT CONSTANTS
BOOTADDR EQU 4000H ;BOOT LOAD ADDRESS FOR P-SYSTEM
BIOSBANK EQU 00000000B ;BIOS BANK
BOOTBANK EQU 00000000B ;BOOT STRAP LOADER BANK
TEMPBUF EQU 0CC00H ;TEMPORARY BUFFER IN VIDEO BANK
; USED FOR DMA ADDRESS WHEN BOOTING SYSTEM
PROD_CODE EQU 2 ;SHELLY PRODUCT CODE WRITTEN ON BOOT SECTOR
PAGE
;INTERRUPT CONSTANTS
SIO_I_TBL EQU 0FFE0H ;LOCATION IN RAM OF SIO INTERRUPT VECTOR
;MUST BE IN HIGH RAM AND END IN 0
INTVEC EQU 0FFFEH ;OTHER INTERRUPT'S VECTOR
;INTERRUPT DEVICE NUMBERS
KBD_DEV EQU 0 ;KEYBOARD DEVICE NUMBER
S_CH_A_I EQU 1 ;DEVICE NUMBER FOR SERIAL CHANNEL A INPUT
S_CH_B_I EQU 2 ;DEVICE NUMBER FOR SERIAL CHANNEL B INPUT
S_CH_A_O EQU 3 ;DEVICE NUMBER FOR SERIAL CHANNEL A OUTPUT
S_CH_B_O EQU 4 ;DEVICE NUMBER FOR SERIAL CHANNEL B OUTPUT
PAGE
;ROM'S RAM VALUES
;FLAGS FOR CONSOLE AND FUNCTION KEY TABLE FLAGS
SYS_TBL EQU 0 ;USE SYSTEM TABLE
APP_TBL EQU 1 ;USE APPLICATION TABLE
NO_TBL EQU 2 ;DON'T USE TRANSLATION TABLE (FUNCTION KEY ONLY)
PAGE
;TABLE DEFINITION LOCATIONS
;SYSTEM TRACK LOCATIONS
KCTRK EQU 2 ;TRACK FOR KEYBOARD AND CHARACTER FONT DEFINITIONS
KEYSEC EQU 17 ;SECTOR FOR KEYBOARD DEFINITION
CHARSEC EQU 20 ;SECTOR FOR CHARACTER FONT DEFINITION
ALTSEC EQU 30 ;SECTOR FOR ALTERNATE CHARACTER FONT DEFINITION
;RAM LOCATIONS
RAMTBL EQU 2000H ;KEYBOARD AND CONSOLE TABLE POINTERS
CHRFONT EQU 0000H ;CHARACTER FONT RAM LOCATION
ALTFONT EQU 800H ;ALTERNATE CHARACTER FONT RAM LOCATIONCodeCTL_KY EQU 2 ;COLUMN NUMBER OF CTL,ALPHA AND SHIFT KEYS ALPH_KY EQU 3 SHFT_KY EQU 4
... for the Jantar this should probably be:
CTL_KY EQU 0 ;COLUMN NUMBER OF CTL,ALPHA AND SHIFT KEYS
ALPH_KY EQU 1
SHFT_KY EQU 0New IMD should fix CTRL A - Z codes ... tested with current patch for MAME ...
arekbr please check the + key again (also with UP for SHIFT): it should display 1 or 2 for testing ...
OK. Sent. Waiting for dad's reply
New IMD should fix CTRL A - Z codes ... tested with current patch for MAME ...
arekbr please check the + key again (also with UP for SHIFT): it should display 1 or 2 for testing ...
no SHIFT = 1
with SHIFT = 2
Of course our SHIFT is a UP ARROW
Please change: 38D5 = 2B for + and 3915 = 2A for *
... we could map 0x38CC (special UP-ARROWS key on the Jantar) to 8A (Cursor Up) ...
