ZX Spectrum Multi User Dungeon (MUD)

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Quazar
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Re: ZX Spectrum Multi User Dungeon (MUD)

Post by Quazar »

MonkZy wrote:
Tue Jul 07, 2020 1:16 am
CircleMUD (Midgaard, New Thalos etc.) server for any testing.
Not familiar with CircleMUD, admittedly though it's been nearly 3 decades since I was spending hours a day on one. It was a lpMUD I was programming for.
MonkZy wrote:
Tue Jul 07, 2020 1:16 am
I really wanted a SAM back in the day. By the time I had the income to buy one, the ship had sailed and I went the Amiga route.
I was late to the SAM scene, didn't get my first until Spring 1993!
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MonkZy
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Re: ZX Spectrum Multi User Dungeon (MUD)

Post by MonkZy »

Update....

Progress has slowed due to work and other distractions but some advances have been made. I have written my own text scrolling routine which is a vast improvement on the scroll used by the spectraNet ROM. I will post the scroll code below. I am very open to suggestions for this routine. The routine + lookup table costs 404 bytes. I am sure there are ways to reduce the size without reducing the speed. I have also added some text formatting to stop words being cut in half. Things look OK, but the MUD data has a carriage return at the end of each 80 character line so some lines leave excess white space at the ends. Really to improve the text formatting, the MUD data would have to be changed. Editing the default circleMUD world would take many hours. I have spent a few hours learning how to structure the MUD files and have added a few new locations and a portal system to gain access to the default circleMUD world. The new locations are more friendly to the 42 char client.



The assembly for my 52 byte scroll routine.

Code: Select all

;;; scroll the text window up one row
;;; B = number of rows to scroll up

Scroll_Up
	push bc
	halt
	ld b,168		; we will loop for 168 lines of screen memory
scroll_loop
	push bc

	;; source and destination are referenced from a lookup table (screen-lookup.asm)
source
	ld hl,(screen_lookup+16)	; source is 8 lines below destination (each line is a 2 byte address)
destination
	ld de,(screen_lookup)
	ld bc,32			; copy 32 bytes, the length of one line
	ldir				; perform copy

	;; increment the source and destination lookup pointers
	ld hl,(destination+2)	; ld de,(NN) uses ED prefix hence +2
	inc hl
	inc hl
	ld (destination+2),hl
	ld hl,(source+1)
	inc hl
	inc hl
	ld (source+1),hl

	pop bc
	djnz scroll_loop

	;; reset the source and destination pointers
	ld hl,screen_lookup+16
	ld (source+1),hl
	ld hl,screen_lookup
	ld (destination+2),hl

	pop bc
	djnz Scroll_Up
The routine uses a 352 byte lookup table :
SpoilerShow

Code: Select all

;;; Lookup table of the address of the first byte of each pixel line

;;; Row 00
     ;defw 16384 ; 000
     ;defw 16640 ; 001
     ;defw 16896 ; 002
     ;defw 17152 ; 003
     ;defw 17408 ; 004
     ;defw 17664 ; 005
     ;defw 17920 ; 006
     ;defw 18176 ; 007
;;; Row 01
screen_lookup		;this label marks the top of the scroll window
     defw 16416 ; 008
     defw 16672 ; 009
     defw 16928 ; 010
     defw 17184 ; 011
     defw 17440 ; 012
     defw 17696 ; 013
     defw 17952 ; 014
     defw 18208 ; 015
;;; Row 02
     defw 16448 ; 016
     defw 16704 ; 017
     defw 16960 ; 018
     defw 17216 ; 019
     defw 17472 ; 020
     defw 17728 ; 021
     defw 17984 ; 022
     defw 18240 ; 023
;;; Row 03
     defw 16480 ; 024
     defw 16736 ; 025
     defw 16992 ; 026
     defw 17248 ; 027
     defw 17504 ; 028
     defw 17760 ; 029
     defw 18016 ; 030
     defw 18272 ; 031
;;; Row 04
     defw 16512 ; 032
     defw 16768 ; 033
     defw 17024 ; 034
     defw 17280 ; 035
     defw 17536 ; 036
     defw 17792 ; 037
     defw 18048 ; 038
     defw 18304 ; 039
;;; Row 05
     defw 16544 ; 040
     defw 16800 ; 041
     defw 17056 ; 042
     defw 17312 ; 043
     defw 17568 ; 044
     defw 17824 ; 045
     defw 18080 ; 046
     defw 18336 ; 047
;;; Row 06
     defw 16576 ; 048
     defw 16832 ; 049
     defw 17088 ; 050
     defw 17344 ; 051
     defw 17600 ; 052
     defw 17856 ; 053
     defw 18112 ; 054
     defw 18368 ; 055
;;; Row 07
     defw 16608 ; 056
     defw 16864 ; 057
     defw 17120 ; 058
     defw 17376 ; 059
     defw 17632 ; 060
     defw 17888 ; 061
     defw 18144 ; 062
     defw 18400 ; 063
;;; Row 08
     defw 18432 ; 064
     defw 18688 ; 065
     defw 18944 ; 066
     defw 19200 ; 067
     defw 19456 ; 068
     defw 19712 ; 069
     defw 19968 ; 070
     defw 20224 ; 071
;;; Row 09
     defw 18464 ; 072
     defw 18720 ; 073
     defw 18976 ; 074
     defw 19232 ; 075
     defw 19488 ; 076
     defw 19744 ; 077
     defw 20000 ; 078
     defw 20256 ; 079
;;; Row 10
     defw 18496 ; 080
     defw 18752 ; 081
     defw 19008 ; 082
     defw 19264 ; 083
     defw 19520 ; 084
     defw 19776 ; 085
     defw 20032 ; 086
     defw 20288 ; 087
;;; Row 11
     defw 18528 ; 088
     defw 18784 ; 089
     defw 19040 ; 090
     defw 19296 ; 091
     defw 19552 ; 092
     defw 19808 ; 093
     defw 20064 ; 094
     defw 20320 ; 095
;;; Row 12
     defw 18560 ; 096
     defw 18816 ; 097
     defw 19072 ; 098
     defw 19328 ; 099
     defw 19584 ; 100
     defw 19840 ; 101
     defw 20096 ; 102
     defw 20352 ; 103
;;; Row 13
     defw 18592 ; 104
     defw 18848 ; 105
     defw 19104 ; 106
     defw 19360 ; 107
     defw 19616 ; 108
     defw 19872 ; 109
     defw 20128 ; 110
     defw 20384 ; 111
;;; Row 14
     defw 18624 ; 112
     defw 18880 ; 113
     defw 19136 ; 114
     defw 19392 ; 115
     defw 19648 ; 116
     defw 19904 ; 117
     defw 20160 ; 118
     defw 20416 ; 119
;;; Row 15
     defw 18656 ; 120
     defw 18912 ; 121
     defw 19168 ; 122
     defw 19424 ; 123
     defw 19680 ; 124
     defw 19936 ; 125
     defw 20192 ; 126
     defw 20448 ; 127
;;; Row 16
     defw 20480 ; 128
     defw 20736 ; 129
     defw 20992 ; 130
     defw 21248 ; 131
     defw 21504 ; 132
     defw 21760 ; 133
     defw 22016 ; 134
     defw 22272 ; 135
;;; Row 17
     defw 20512 ; 136
     defw 20768 ; 137
     defw 21024 ; 138
     defw 21280 ; 139
     defw 21536 ; 140
     defw 21792 ; 141
     defw 22048 ; 142
     defw 22304 ; 143
;;; Row 18
     defw 20544 ; 144
     defw 20800 ; 145
     defw 21056 ; 146
     defw 21312 ; 147
     defw 21568 ; 148
     defw 21824 ; 149
     defw 22080 ; 150
     defw 22336 ; 151
;;; Row 19
     defw 20576 ; 152
     defw 20832 ; 153
     defw 21088 ; 154
     defw 21344 ; 155
     defw 21600 ; 156
     defw 21856 ; 157
     defw 22112 ; 158
     defw 22368 ; 159
;;; Row 20
     defw 20608 ; 160
     defw 20864 ; 161
     defw 21120 ; 162
     defw 21376 ; 163
     defw 21632 ; 164
     defw 21888 ; 165
     defw 22144 ; 166
     defw 22400 ; 167
;;; Row 21
output_line
     defw 20640 ; 168
     defw 20896 ; 169
     defw 21152 ; 170
     defw 21408 ; 171
     defw 21664 ; 172
     defw 21920 ; 173
     defw 22176 ; 174
     defw 22432 ; 175
;;; Row 22

     defw 20672 ; 176
     defw 20928 ; 177
     defw 21184 ; 178
     defw 21440 ; 179
     defw 21696 ; 180
     defw 21952 ; 181
     defw 22208 ; 182
     defw 22464 ; 183
;;; Row 23
status_line
     defw 20704 ; 184
     ;defw 20960 ; 185
     ;defw 21216 ; 186
     ;defw 21472 ; 187
     ;defw 21728 ; 188
     ;defw 21984 ; 189
     ;defw 22240 ; 190
     ;defw 22496 ; 191
I have also set up a TNFS server on the Pi alongside the MUD server. I will be adding in-line images very soon.

Imminent ToDo's


- Delete key. Still not got one.
- 10kb text buffer, allowing the user to scroll back text to re-read it.
- A 'More..' prompt when the incoming data goes over 21 lines. Client will wait for a space bar before continuing.

I am pretty much ready to put this thing online for testing. My only reservation at this point is security. How much of a risk is forwarding a couple of ports (TCP for the MUD, UDP for the TNFS server) to a Pi running on a standard broadband router?
I could afford to rent some server space and host the two servers on that which would remove the need to publish my home IP, but if it is relatively safe to run TNFS/MUD from home I would do it that way and forgo the cost.
I have set up the TNFS server to deliver the latest version of the SpectraMUD client, so you can set it up as a default filesystem and boot straight into the latest version.
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Guesser
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Re: ZX Spectrum Multi User Dungeon (MUD)

Post by Guesser »

Definitely set up your file permissions to make the tnfs root read only to the daemon if it's a public server. You can run tnfsd 'chroot' too.

I love the smooth scrolling.
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8BitAG
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Re: ZX Spectrum Multi User Dungeon (MUD)

Post by 8BitAG »

Interesting stuff. I spent a good year or so, solidly playing MUDs and MUSHes when I was at Uni in 93/94. Too long probably. :) As a text adventure fan it was a natural first step in online gaming. Was a regular on Uglymug and EleMUD... It's quite cool to see that they're still around... I even logged in to my old Uglymug account a few years ago and wandered around the rooms I created... Sadly my EleMUD account was long gone and the landscape was almost completely different to what I remembered.

Certainly a fun project. I've seen similar things done on other platforms too. On the BBC they''ve recreated some of the old MUDs in an offline single-player form which is also an interesting way of capturing some elements of the experience.
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