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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
305.9 KB 08/04/215729
54.7 KB 08/04/21572
43.7 KB 08/04/21488
91.3 KB 08/04/21464
118.3 KB 08/04/21414
55.5 KB 08/04/21398
116.1 KB 08/04/21
395
87.7 KB 08/04/21
389
90.7 KB 08/04/21380
113.0 KB 08/04/21
380
82.8 KB 08/04/21365
109.1 KB 08/04/21353
72.7 KB 08/04/21332
68.1 KB 08/04/21325
117.0 KB 08/04/21
323
170.2 KB 08/04/21
315
83.9 KB 08/04/21302
202.2 KB 08/04/21299
74.7 KB 08/04/21
287
170.1 KB 08/04/21269
67.3 KB 08/04/21263
82.2 KB 08/04/21260
77.7 KB 08/04/21
259
62.3 KB 08/04/21257
87.4 KB 08/04/21254
90.0 KB 08/04/21
253
86.4 KB 08/04/21252
116.6 KB 08/04/21246
96.2 KB 08/04/21246
110.4 KB 08/04/21
242
128.2 KB 08/04/21235
79.8 KB 08/04/21229
86.3 KB 08/04/21228
262.9 KB 08/04/21225
78.9 KB 08/04/21223
90.8 KB 08/04/21222
88.2 KB 08/04/21221
63.6 KB 08/04/21220
81.9 KB 08/04/21218
117.9 KB 08/04/21218
68.1 KB 08/04/21215
160.9 KB 08/04/21215
98.6 KB 08/04/21214
47.5 KB 08/04/21214
171.3 KB 08/04/21212
77.3 KB 08/04/21210
95.0 KB 08/04/21210
59.0 KB 08/04/21210
57.5 KB 08/04/21210
124.2 KB 08/04/21209
56.7 KB 08/04/21
209
53.7 KB 08/04/21208
141.2 KB 08/04/21208
62.2 KB 08/04/21208
81.2 KB 08/04/21207
160.7 KB 08/04/21206
182.8 KB 08/04/21206
103.4 KB 08/04/21205
207.0 KB 08/04/21205
100.8 KB 08/04/21204
82.6 KB 08/04/21204
87.2 KB 08/04/21204
247.6 KB 08/04/21203
110.5 KB 08/04/21200
384.5 KB 08/04/21199
161.0 KB 08/04/21198
51.4 KB 08/04/21198
168.6 KB 08/04/21198
89.9 KB 08/04/21198
66.7 KB 08/04/21197
147.2 KB 08/04/21197
96.4 KB 08/04/21196
76.9 KB 08/04/21195
50.8 KB 08/04/21194
74.1 KB 08/04/21194
104.6 KB 08/04/21194
53.3 KB 08/04/21194
96.8 KB 08/04/21193
138.9 KB 08/04/21193
78.1 KB 08/04/21192
71.3 KB 08/04/21192
73.6 KB 08/04/21192
132.0 KB 08/04/21191
117.2 KB 08/04/21190
87.5 KB 08/04/21190
125.7 KB 08/04/21190
71.2 KB 08/04/21190
113.2 KB 08/04/21189
70.9 KB 08/04/21189
83.5 KB 08/04/21189
56.2 KB 08/04/21189
97.3 KB 08/04/21189
296.0 KB 08/04/21188
207.4 KB 08/04/21188
140.7 KB 08/04/21188
67.9 KB 08/04/21188
150.5 KB 08/04/21188
73.3 KB 08/04/21188
45.4 KB 08/04/21188
257.1 KB 08/04/21188
83.0 KB 08/04/21187
76.2 KB 08/04/21187
158.4 KB 08/04/21187
40.1 KB 08/04/21187
93.4 KB 08/04/21187
210.5 KB 08/04/21187
125.6 KB 08/04/21187
69.8 KB 08/04/21186
78.2 KB 08/04/21186
113.0 KB 08/04/21186
189.4 KB 08/04/21185
321.2 KB 08/04/21185
167.7 KB 08/04/21185
90.4 KB 08/04/21185
136.4 KB 08/04/21185
50.8 KB 08/04/21185
89.7 KB 08/04/21185
119.2 KB 08/04/21184
65.5 KB 08/04/21184
81.8 KB 08/04/21183
145.6 KB 08/04/21183
70.1 KB 08/04/21183
122.5 KB 08/04/21182
68.0 KB 08/04/21182
163.2 KB 08/04/21182
69.7 KB 08/04/21182
47.3 KB 08/04/21182
176.0 KB 08/04/21182
179.4 KB 08/04/21181
83.8 KB 08/04/21181
98.7 KB 08/04/21180
89.3 KB 08/04/21180
361.5 KB 08/04/21179
70.2 KB 08/04/21179
167.5 KB 08/04/21179
122.9 KB 08/04/21178
162.2 KB 08/04/21178
157.1 KB 08/04/21178
113.6 KB 08/04/21177
55.0 KB 08/04/21177
173.4 KB 08/04/21177
74.8 KB 08/04/21177
112.7 KB 08/04/21177
142.6 KB 08/04/21177
83.2 KB 08/04/21177
113.4 KB 08/04/21176
177.1 KB 08/04/21176
68.3 KB 08/04/21176
101.1 KB 08/04/21176
62.4 KB 08/04/21176
176.6 KB 08/04/21176
103.8 KB 08/04/21176
47.3 KB 08/04/21175
74.8 KB 08/04/21175
99.3 KB 08/04/21175
176.3 KB 08/04/21175
304.4 KB 08/04/21175
187.8 KB 08/04/21175
145.7 KB 08/04/21174
106.8 KB 08/04/21174
244.5 KB 08/04/21174
123.8 KB 08/04/21174
114.0 KB 08/04/21173
60.6 KB 08/04/21173
113.7 KB 08/04/21173
336.9 KB 08/04/21172
112.3 KB 08/04/21172
76.7 KB 08/04/21171
140.3 KB 08/04/21171
58.2 KB 08/04/21170
136.5 KB 08/04/21170
182.8 KB 08/04/21170
322.1 KB 08/04/21170
128.1 KB 08/04/21170
54.3 KB 08/04/21169
219.7 KB 08/04/21169
99.8 KB 08/04/21168
51.7 KB 08/04/21168
159.8 KB 08/04/21168
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63.2 KB 08/04/21168
99.2 KB 08/04/21168
262.4 KB 08/04/21167
162.2 KB 08/04/21167
68.7 KB 08/04/21166
53.2 KB 08/04/21166
67.5 KB 08/04/21165
84.8 KB 08/04/21165
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106.3 KB 08/04/21165
103.3 KB 08/04/21165
115.8 KB 08/04/21165
74.9 KB 08/04/21165
76.0 KB 08/04/21165
67.5 KB 08/04/21165
55.7 KB 08/04/21165
98.0 KB 08/04/21165
73.2 KB 08/04/21164
118.3 KB 08/04/21164
141.6 KB 08/04/21164
63.0 KB 08/04/21164
59.0 KB 08/04/21164
62.8 KB 08/04/21163
100.6 KB 08/04/21163
100.9 KB 08/04/21163
75.6 KB 08/04/21163
146.2 KB 08/04/21162
186.5 KB 08/04/21162
180.2 KB 08/04/21162
75.0 KB 08/04/21161
129.8 KB 08/04/21161
169.8 KB 08/04/21160
66.1 KB 08/04/21160
66.5 KB 08/04/21160
419.5 KB 08/04/21159
149.2 KB 08/04/21159
117.1 KB 08/04/21159
77.8 KB 08/04/21158
72.7 KB 08/04/21158
162.6 KB 08/04/21158
141.5 KB 08/04/21157
88.4 KB 08/04/21156
118.2 KB 08/04/21156
89.9 KB 08/04/21155
52.5 KB 08/04/21155
81.3 KB 08/04/21155
85.1 KB 08/04/21155
103.6 KB 08/04/21154
61.9 KB 08/04/21154
118.6 KB 08/04/21153
361.0 KB 08/04/21152
69.1 KB 08/04/21152
110.7 KB 08/04/21152
88.0 KB 08/04/21151
57.8 KB 08/04/21150
62.3 KB 08/04/21148
49.1 KB 08/04/21148
74.2 KB 08/04/21147
65.4 KB 08/04/21146
58.1 KB 08/04/21141


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