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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
05713 Misc. Minor Always Oct 10, 2014, 11:21 Oct 12, 2014, 12:54
Tester demotester View Status Public Platform MESS (Official Binary)
Assigned To Resolution Open OS Windows XP
Status [?] Acknowledged Driver
Version 0.154 Fixed in Version Build Normal
Fixed in Git Commit Github Pull Request #
Summary MESS-specific 05713: cpc464, cpc6128 (and possibly clones): What CRTC type is emulated in MESS ?
Description Case 1
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Found on following link "Tools about CRTC" (DSK for Emulators):

http://www.cpcwiki.eu/index.php/CRTC

some BASIC tools to detect CRTC types 0-1-2 and show some effects - by Elmar Krieger:

Elmar_Krieger-SPECIAL_EFFECTS.dsk

start cpc6128 and mount above dsk

run"listing2"

it will report: "CRTC-Test aktiviert, CRTC 6845R=Typ 1 gefunden."


Case 2
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Try to start the pouet demo "From Scratch by Vanity":

http://www.pouet.net/prod.php?which=53596

it will report: "CRTC1 needed"
Steps To Reproduce
Additional Information
Github Commit
Flags
Regression Version
Affected Sets / Systems cpc464, cpc6128 (and possibly clones)
Attached Files
 
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Notes
2
User avatar
No.11036
mahlemiut
Developer
Oct 11, 2014, 20:50
It should be the MC6845 (type 2). Other CRTC types are supported, but I don't know if there's any real difference in their emulation, plus there's no easy way to be able to select the CRTC. Could be slotified, maybe?
User avatar
No.11047
demotester
Tester
Oct 12, 2014, 12:54
Mainboard Versions -> http://www.cpcwiki.eu/index.php/Mainboard_Versions

CRTC versions according to above link MB pictures:
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CPC464 version 1 (original) -> HD6845SP
CPC464 version 2 (new gate array) -> MC6845P, HD6845SP, UM6845
CPC464 version 3 (medium-sized) -> UM6845R
CPC464 version 4 (cost-down) -> 40226

CPC472 -> HD6845SP

CPC664 -> HD6845SP

CPC6128 version 1 -> HD6845SP
CPC6128 version 2 -> HD6845SP, MC6845P, UM6845, UM6845R
CPC6128 version 3 (cost-down) -> 40226