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Length: 2944 (0xb80)
Types: TextFile
Names: »READ48.ME«
└─⟦4dd5d59b6⟧ Bits:30003303 Mix C version 2.1 og debugger til RC703
└─ ⟦this⟧ »READ48.ME«
8048 Cross-Assembler Notes
==========================
Contents Of The Diskette
------------------------
1. XASM48.COM .......... 8048/8041 Family Cross-Assembler
2. TEST48.ASM ......... Demonstration source code file, showing
8048/8041 family instruction set.
Current Versions
----------------
CP/M-80: 1.64 (Released 04-Oct-83)
Enhancements In V1.64
---------------------
1. SYNONYMS FOR PSEUDO-OPS
The pseudo-op EJECT has been added as a synonym for PAGE.
INCLUDE has been added as a synonym for INCLUD.
2. FORWARD REFERENCES IN PSEUDO-OPS
An 'F' error will occur if a forward reference is present in the
operand of any of the following pseudo-ops:
DS
EQU
IF
LOC
ORG
SET
In general, if an 'F' error is present in your assembly you can expect
obscure problems; usually, some symbols will have values which don't
correspond to the location counter. Thus, it's best to get rid of all
illegal forward references before trusting the generated code.
3. DEFAULT LISTING DESTINATION
The assembly listing now defaults to a .PRN file, rather than to
the printer. It may be diverted to the printer by specifying the
'P' switch in the assembler command line. The 'D' switch is no
longer recognized.
Bugs Fixed In V1.64
-------------------
1. The END statement is now recognized even if an unterminated conditional
(ie. IF without ENDIF) is present.
2. When the assembly listing is sent directly to the printer, the page
headings no longer contain LF characters with the high-order bit set.
3. The SHR operator has been fixed.
4. Symbols beginning with a period (".") are now accepted.
Known Bugs Remaining In V1.64
-----------------------------
1. The presence of a non-printing ASCII character in a source
line may cause an 'S' error, or may cause the line to be
interpreted incorrectly.
2. Quasi-Bug: Assembler input (ie. source file) must be upper-case,
except within quoted strings and character constants.
Updates To XASM48 Manual
------------------------
1. FORMAT OF OBJECT FILE (Appendix B)
The END record in object files produced by XASM48 is now:
Byte 1 :
2..3 00 (no. of data bytes)
4..7 0000 (or execution address, if
specified in END statement)
8..9 01 (record type)
10 FF (checksum)
This change reflects Intel's revised definition of the HEX format.
2. RE-DEFINITION OF HARDWARE REGISTERS (V1.63 and Higher)
By popular request, XASM48 now supports the assignment of symbolic
names to the hardware registers. Thus one can write, for example,
FOO EQU R0
BAR EQU R5
MOV A,@FOO
MOV BAR,#27H
3. INTERRUPTING ASSEMBLY
Assembler operation may be terminated at any time by striking a control-C.
«eof»