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Commodore VIC20 ROMs

Commodore Vic20

Manufacturer : Commodore | System : VIC20

Welcome to the Commodore VIC20 ROMs section of the ROM Database. Please scroll down for more sections and remember to share this page. You can also vote for your favourite system.

Commodore Vic 20 Roms Section.

The VIC-20 (Germany: VC-20; Japan: VIC-1001) is an 8-bit home computer which was sold by Commodore Business Machines. The VIC-20 was announced in 1980, roughly three years after Commodore's first personal computer, the PET. The VIC-20 was the first computer of any description to sell one million units.

The VIC-20 was intended to be more economical than the PET computer. It was equipped with 5 kB of static RAM and used the same MOS 6502 CPU as the PET. The VIC-20's video chip, the MOS Technology VIC, was a general-purpose color video chip designed by Al Charpentier in 1977 and intended for use in inexpensive display terminals and game consoles, but Commodore could not find a market for the chip. As the Apple II gained momentum with the advent of VisiCalc in 1979, Jack Tramiel wanted a product that would compete in the same segment, to be presented at the January 1980 CES. For this reason Chuck Peddle and Bill Seiler started to design a computer named TOI (The Other Intellect).

The TOI computer failed to materialize, mostly because it required an 80-column character display which in turn required the MOS Technology 6564 chip. However, the chip could not be used in the TOI since it required very expensive static RAM to operate fast enough. In the meantime, freshman engineer Robert Yannes at MOS Technology (then a part of Commodore) had designed a computer in his home dubbed the MicroPET and finished a prototype with some help from Al Charpentier and Charles Winterble. With the TOI unfinished, when Jack Tramiel was confronted with the MicroPET prototype, he immediately said he wanted it to be finished and ordered it to be mass-produced following a limited demonstration at the CES.

The prototype produced by Yannes had very few of the features required for a real computer, so Robert Russell at Commodore headquarters had to co-ordinate and finish large parts of the design under the codename Vixen. The parts contributed by Russell included a port of the operating system (kernel and BASIC interpreter) taken from John Feagans design for the Commodore PET, a character set with the characteristic PETSCII, an Atari 2600-compatible joystick interface, and a ROM cartridge port. The serial IEEE 488-derivative interface (which could use far cheaper cabling than a real IEEE-488 as was used on the PET) was designed by Glen Stark. Some features, like the memory add-in board, were designed by Bill Seiler.[citation needed] Altogether, the VIC 20 development team consisted of five people, who referred to themselves as the VIC Commandos. According to one of the development team, Neil Harris, "We couldn't get any cooperation from the rest of the company who thought we were jokers because we were working late, about an hour after everyone else had left the building. We'd swipe whatever equipment we needed to get our jobs done. There was no other way to get the work done! [...] they'd discover it was missing and they would just order more stuff from the warehouse, so everybody had what they needed to do their work." At the time, Commodore had an oversupply of 1 kbit×4 SRAM chips, so Tramiel decided that these should be used in the new computer. The end result was arguably closer to the PET or TOI computers than to Yannes' prototype, albeit with a 22-column VIC chip instead of the custom chips designed for the more ambitious computers.

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Index of: Roms/Commodore/VIC20/4kb/

Name Size Modified Rating DLs C|R|SS
91.3 KB 08/04/21463
116.6 KB 08/04/21245
170.2 KB 08/04/21
314
67.3 KB 08/04/21262
110.4 KB 08/04/21
242
98.6 KB 08/04/21214
160.7 KB 08/04/21206
117.9 KB 08/04/21218
116.1 KB 08/04/21
393
74.7 KB 08/04/21
285
63.6 KB 08/04/21219
73.6 KB 08/04/21191
161.0 KB 08/04/21197
113.0 KB 08/04/21
378
55.5 KB 08/04/21397
81.2 KB 08/04/21206
62.2 KB 08/04/21207
128.2 KB 08/04/21234
182.8 KB 08/04/21205
86.3 KB 08/04/21228
67.5 KB 08/04/21164
83.9 KB 08/04/21301
70.9 KB 08/04/21188
77.7 KB 08/04/21
257
55.7 KB 08/04/21165
54.7 KB 08/04/21571
160.9 KB 08/04/21214
89.7 KB 08/04/21184
77.3 KB 08/04/21209
202.2 KB 08/04/21298
73.2 KB 08/04/21163
78.9 KB 08/04/21222
119.2 KB 08/04/21183
74.1 KB 08/04/21193
93.4 KB 08/04/21186
57.5 KB 08/04/21209
167.5 KB 08/04/21178
176.6 KB 08/04/21175
117.2 KB 08/04/21189
51.4 KB 08/04/21197
82.6 KB 08/04/21203
257.1 KB 08/04/21187
50.8 KB 08/04/21193
95.0 KB 08/04/21208
62.3 KB 08/04/21257
65.5 KB 08/04/21184
53.7 KB 08/04/21207
157.1 KB 08/04/21177
76.9 KB 08/04/21194
97.3 KB 08/04/21188
125.6 KB 08/04/21186
56.2 KB 08/04/21188
83.8 KB 08/04/21180
96.2 KB 08/04/21245
88.2 KB 08/04/21220
55.0 KB 08/04/21176
210.5 KB 08/04/21186
50.8 KB 08/04/21184
66.7 KB 08/04/21196
103.4 KB 08/04/21204
45.4 KB 08/04/21187
158.4 KB 08/04/21186
67.9 KB 08/04/21187
247.6 KB 08/04/21202
109.1 KB 08/04/21352
68.0 KB 08/04/21181
100.8 KB 08/04/21203
83.2 KB 08/04/21176
67.5 KB 08/04/21164
56.7 KB 08/04/21
207
88.4 KB 08/04/21155
69.7 KB 08/04/21181
159.8 KB 08/04/21167
54.3 KB 08/04/21168
74.8 KB 08/04/21174
53.2 KB 08/04/21165
96.8 KB 08/04/21192
305.9 KB 08/04/215729
59.0 KB 08/04/21163
81.9 KB 08/04/21217
43.7 KB 08/04/21488
296.0 KB 08/04/21187
123.8 KB 08/04/21173
82.8 KB 08/04/21364
71.3 KB 08/04/21191
78.1 KB 08/04/21191
187.8 KB 08/04/21174
168.6 KB 08/04/21197
262.9 KB 08/04/21224
113.0 KB 08/04/21185
76.7 KB 08/04/21170
117.0 KB 08/04/21
321
122.9 KB 08/04/21177
83.0 KB 08/04/21186
180.2 KB 08/04/21161
179.4 KB 08/04/21180
110.5 KB 08/04/21199
72.7 KB 08/04/21331
167.7 KB 08/04/21185
322.1 KB 08/04/21170
361.5 KB 08/04/21179
90.7 KB 08/04/21379
76.0 KB 08/04/21164
89.9 KB 08/04/21197
149.2 KB 08/04/21158
100.9 KB 08/04/21162
104.6 KB 08/04/21193
68.1 KB 08/04/21214
170.1 KB 08/04/21268
65.4 KB 08/04/21145
62.8 KB 08/04/21162
162.6 KB 08/04/21157
58.1 KB 08/04/21140
110.7 KB 08/04/21151
51.7 KB 08/04/21167
118.6 KB 08/04/21152
101.1 KB 08/04/21176
150.5 KB 08/04/21187
140.3 KB 08/04/21170
72.7 KB 08/04/21157
128.1 KB 08/04/21169
173.4 KB 08/04/21176
115.8 KB 08/04/21164
89.9 KB 08/04/21164
99.2 KB 08/04/21167
189.4 KB 08/04/21184
83.5 KB 08/04/21189
113.7 KB 08/04/21173
136.4 KB 08/04/21184
113.2 KB 08/04/21188
75.0 KB 08/04/21160
66.5 KB 08/04/21159
74.8 KB 08/04/21176
141.5 KB 08/04/21156
182.8 KB 08/04/21169
62.4 KB 08/04/21175
118.3 KB 08/04/21413
88.0 KB 08/04/21150
78.2 KB 08/04/21185
132.0 KB 08/04/21190
103.6 KB 08/04/21153
104.6 KB 08/04/21167
103.3 KB 08/04/21164
125.7 KB 08/04/21189
68.7 KB 08/04/21165
66.1 KB 08/04/21159
85.1 KB 08/04/21154
74.9 KB 08/04/21164
99.8 KB 08/04/21167
145.6 KB 08/04/21183
142.6 KB 08/04/21177
118.2 KB 08/04/21155
90.0 KB 08/04/21
252
141.6 KB 08/04/21163
82.2 KB 08/04/21259
53.3 KB 08/04/21193
336.9 KB 08/04/21171
146.2 KB 08/04/21161
86.4 KB 08/04/21251
103.8 KB 08/04/21175
87.7 KB 08/04/21
387
207.0 KB 08/04/21204
113.6 KB 08/04/21177
90.4 KB 08/04/21185
68.1 KB 08/04/21325
96.4 KB 08/04/21196
68.3 KB 08/04/21175
63.2 KB 08/04/21167
74.2 KB 08/04/21147
124.2 KB 08/04/21208
89.3 KB 08/04/21179
87.4 KB 08/04/21254
147.2 KB 08/04/21197
141.2 KB 08/04/21207
118.3 KB 08/04/21163
62.3 KB 08/04/21148
145.7 KB 08/04/21173
138.9 KB 08/04/21192
59.0 KB 08/04/21209
98.7 KB 08/04/21179
136.5 KB 08/04/21170
60.6 KB 08/04/21172
169.8 KB 08/04/21159
177.1 KB 08/04/21175
113.4 KB 08/04/21175
219.7 KB 08/04/21168
57.8 KB 08/04/21150
98.0 KB 08/04/21164
77.8 KB 08/04/21158
87.5 KB 08/04/21189
244.5 KB 08/04/21173
176.3 KB 08/04/21174
122.5 KB 08/04/21181
99.3 KB 08/04/21174
61.9 KB 08/04/21153
162.2 KB 08/04/21177
49.1 KB 08/04/21147
129.8 KB 08/04/21160
106.3 KB 08/04/21164
89.9 KB 08/04/21154
69.8 KB 08/04/21185
58.2 KB 08/04/21169
81.8 KB 08/04/21182
81.3 KB 08/04/21154
52.5 KB 08/04/21154
176.0 KB 08/04/21181
186.5 KB 08/04/21162
70.1 KB 08/04/21182
140.7 KB 08/04/21187
112.3 KB 08/04/21171
63.0 KB 08/04/21163
207.4 KB 08/04/21187
69.1 KB 08/04/21151
384.5 KB 08/04/21198
361.0 KB 08/04/21151
73.3 KB 08/04/21188
75.6 KB 08/04/21163
419.5 KB 08/04/21159
117.1 KB 08/04/21158
112.7 KB 08/04/21176
100.6 KB 08/04/21162
163.2 KB 08/04/21182
162.2 KB 08/04/21167
47.3 KB 08/04/21174
84.8 KB 08/04/21164
70.2 KB 08/04/21178
171.3 KB 08/04/21212
76.2 KB 08/04/21186
79.8 KB 08/04/21228
71.2 KB 08/04/21189
321.2 KB 08/04/21185
114.0 KB 08/04/21172
262.4 KB 08/04/21167
40.1 KB 08/04/21187
47.5 KB 08/04/21213
90.8 KB 08/04/21222
106.8 KB 08/04/21173
47.3 KB 08/04/21181
304.4 KB 08/04/21174
87.2 KB 08/04/21203


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