Load
LOAD SAVE KILL FILES FORMAT ROM2 uses the two character extension in TDD file names for determining the file type.
ROM2 allows these extensions: .DO, .CO, .BA, and .BR.
Extensions in ROM2 commands which have two file names must have equivalent file types. If the extension is omitted in the second file name then the extension of the first is used. If the extension is omitted in the first file name then .DO is used.
ROM2 allows a third character in the TDD file extension. Weak machine file type checking (the default mode) allows any character. Strong checking allows only the machine's corresponding digit (if the third character is blank then the machine's digit is added). Machine file type checking helps when the TDD files are a mixture of Model 100, NEC 8201A, and/or Tandy 200 files. Since .CO files are almost never compatible, running the wrong machine's file will probably lead to a machine crash and data loss. Also, NEC and Tandy BASIC programs are tokenized differently and will probably corrupt RAM if loaded into the wrong machine type. Strong machine file type checking prevents loading the wrong type of file into the machine.
100: POKE 63852,0 200: POKE 62044,0 NEC: POKE 63577,0 SAVE PROG.BA PROG.BA1 SAVE PROG.BA PROG.BA2 100: POKE 63852,32 200: POKE 62044,32 NEC: POKE 63577,32 If the third char is blank then the proper machine char is added. Example (assuming the machine is a Model 100):
SAVE PROG.BA PROG.BA1 SAVE PROG.BA PROG.BA2 ASM _LAB_.DO ENTRY DEC HEX &file [0..9]* 'T' [0..1]* 'Y' F [ DEC HEX LPT COM EQ [ NEQ [ CST D L [ N RAM ROM2 uses the last two-thirds of In_buf for operating on user input. This limits the usable input line length to 80 chars while in DBG or other ROM2 functions.
In the T200, the Page2 area starts at F7B0 and runs for 640 bytes to FA2F. ROM2 and Cleuseau use the F7C8..F8CF part only.
Load
Save
Kill
List TDD files and sizes.
Format the TDD disk. (No confirmation.)
TDD file types:
Strong and weak machine file types:
Weak machine file type mode:
Third character in the file extension can be anything.
Third character in the file extension can be anything.
Third character in the file extension can be anything. Example (assuming the machine is a Model 100):
Save RAM file PROG.BA as TDD file PROG.BA1.
Save RAM file PROG.BA as TDD file PROG.BA2.
Strong machine file type mode:
Third character in the file extension must be '1'.
Third character in the file extension must be '2'.
Third character in the file extension must be '0'.
Save RAM file PROG.BA as TDD file PROG.BA1.
Results in a ?FC error, due to machine type mismatch.
Example ROM2/TDD program:
10 INPUT "File";F$
20 IF F$="" THEN MENU
30 RC$="LOAD "+F$:CALL 911
40 RC$="ASMN "+F$+" "+F$:CALL 911
50 RC$="SAVE "+F$+".CO":CALL 911
60 MENU
****** ASM/DBG Modifications ******
New ASM modes:
Assembles
An _ASM_.DO file can be renamed _LAB_.DO and used as the initial symbol table for ASM. This reduces the time and memory required to assemble programs which reference many constant label values.
New ASM pseudo ops:
Define the current PC ($) as the EXEcute address for the .CO file created by ASM.
Untyped constants are converted to decimal. This is the initial mode of ASM.
Untyped constants are converted to hexadecimal.
Extended ASM pseudo ops:
&&file
If file.DO is not in RAM then load it from the TDD, include it and then delete it. Macros can not be defined in a file loaded this way.
New ASM/DBG constant types:
Decimal constant. This constant type is needed for entering decimal constants while in HEX mode, since 'D' is a valid hex digit.
Binary constant. This constant type is needed for entering binary constants while in hex mode, since 'B' is a valid hex digit.
New DBG commands:
Find all memory blocks matching the one that starts at address
Display register values in decimal. Untyped constants are converted to decimal.
Display register values in hexadecimal. Untyped constants are converted to hexadecimal. This is the initial mode of DBG.
All DBG display goes to the printer, including prompts and keyboard entry.
All DBG display and input via the COM/MDM port. Use TELCOM's STAT command or a BASIC OPEN statement to set the communication parameters.
Breakpoint if the byte at
Breakpoint if the byte at
Clear the stack trap address. DBG automatically exits when the RET at the end of a routine that invoked DBG is simulated. CST turns off the auto exit.
Display registers and the next instruction to be simulated. All values displayed in decimal or hexadecimal, controlled by the DEC and HEX commands. DBG starts in HEX mode. Values and addresses displayed as the equivalent label name if possible.
Disassemble opcodes starting at
as first debug command. Causes subsequent L commands to disassemble the Cleuseau/ROM2 addresses. This allows you to examine and test the contents of the Cleuseau/ ROM2. Also can run/simulate ROM2 routines.
******Other Notes ******
ROM2/Cleuseau uses the following areas of RAM:
ROM_Check: T200:EEC8..EEEE
IN_Buf: T200:EFC0..F05F
ROM_Name: T200:F4D3..F4DA
Page2: T200:F7C8..F8CF
The Original Laptop Computer . . . 1983