kevinboone / cpm-cal Goto Github PK

View Code? Open in Web Editor NEW

9.0 9.0 1.0 127 KB

An implementation for CP/M, in Z80 assembly language, of the Unix "cal" utility

Makefile 2.35% Assembly 97.65%

cpm-cal's People

Contributors

Stargazers

Watchers

Forkers

mike632t

cpm-cal's Issues

Simplify linking ?

I like your style (and I may borrow some of your ideas) but I was wondering if you knew that you can automatically link in relocatable object files using .REQUEST ?

e.g

.REQUEST    CONIO

Using this feature of the Microsoft Macro assembler might allow you to simplify the link command making it a little easier to rebuild the binary on CPM itself...

It is probably simpler to simpler to specify the code entry point in main rather than 'mess about' with ASEG and /P directives (there are I suspect perfectly good reasons for using these directives it you want code to burn into a ROM but I've always let the linker just do its' thing).

main.asm


;------------------------------------------------------------------------
; 
;  CAL utility
;
;  main.asm 
;
;  Copyright (c)2021 Kevin Boone, GPL v3.0
;
;------------------------------------------------------------------------

        .Z80

;       ASEG
;       ORG    0100H

        include CONIO.INC
        include CLARGS.INC
        include INTMATH.INC
        include DATE.INC
        include STRING.INC
        include ROMWBW.INC

        .request conio
        .request clargs 
        .request intmath 
        .request date 
        .request string 
        .request romwbw 
        .request mem 

;       JP      main

rtcse:  ; sec
        db 0

end 	main

Makefile

$(TARGET): conio.rel main.rel intmath.rel string.rel mem.rel clargs.rel date.rel romwbw.rel
	$(CPM) $(LINK80) main,$(NAME)/n/e

The result should be an executable that starts with a jump to the entry point...

0100 C37C01C3 7C01E521 1A03CDE3 0321D502  .|..|..!.....!..
0110 CDE303E1 C9E52145 03CDE303 E1C9D5CD  ......!E........
0120 0308B7CA 73027BB7 CA7302FE 0DD27302  ....s.{..s....s.

I'm not sure if the month should be indented but it seems to work..

cpm cal 8 2023 /s
August 2023
Su Mo Tu We Th Fr Sa
       1  2  3  4  5 
 6  7  8  9 10 11 12 
13 14 15 16 17 18 19 
20 21 22 23 24 25 26 
27 28 29 30 31

Error after rebuilding binary from source

I can execute the (renamed) prebuilt binary no problem

$ cpm calendar.com 
No RTC: give month and year
Usage: cal [/hsv] {month} {4-digit year}

$cpm cal 2 1963
February 1963
Mo Tu We Th Fr Sa Su
             1  2  3 
 4  5  6  7  8  9 10 
11 12 13 14 15 16 17 
18 19 20 21 22 23 24 
25 26 27 28 
$

And, after tweaking the make file slightly I can rebuild the binary from source without any errors

$ make all
cpm ../macro =conio.asm

No Fatal error(s)
cpm ../macro =main.asm

No Fatal error(s)
cpm ../macro =intmath.asm

No Fatal error(s)
cpm ../macro =string.asm

No Fatal error(s)
cpm ../macro =mem.asm

No Fatal error(s)
cpm ../macro =clargs.asm

No Fatal error(s)
cpm ../macro =date.asm

No Fatal error(s)
cpm ../macro =romwbw.asm

No Fatal error(s)
cpm ../link main,conio,intmath,string,mem,clargs,date,romwbw,cal/n/e

Data    0103    0997    < 2196>

51647 Bytes Free
[0000   0997        9]
$

However attempting to execute it doesn't have the expected result...

$ cpm cal
cpm: HALT instruction executed
$

simh (build 0fa5807e) also gives up, but is a little more informative!

A>cal 2 1963

HALT instruction, PC: 00132 (HALT)

kevinboone / cpm-cal Goto Github PK

cpm-cal's People

Contributors

Stargazers

Watchers

Forkers

cpm-cal's Issues

Simplify linking ?

Specify entry point in main

main.asm

Makefile

Error after rebuilding binary from source

Recommend Projects

React

Vue.js

Typescript

TensorFlow

Django

Laravel

D3

Recommend Topics

javascript

web

server

Machine learning

Visualization

Game

Recommend Org

Facebook

Microsoft

Google

Alibaba

D3

Tencent